off devices (either manual or automatic) near the end of the hoses opposite to the manifold gauge. SERVICE COUPLERS. Never attempt to connect HFC-134a ...
Index of /manuals/AUTOMOBILE/NISSAN/murano/2007/2007 Murano
AUTOMATIC AIR CONDITIONER J AIR CONDITIONER A SECTION B AUTOMATIC AIR CONDITIONER C D CONTENTS E PRECAUTIONS ......................................................... 5 Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" ................................................................. 5 Precautions Necessary for Steering Wheel Rotation After Battery Disconnect ......................................... 5 OPERATION PROCEDURE ................................ 5 PrecautionsforProcedureswithoutCowlTopCove.r.... 6 Precautions for Working with HFC-134a (R-134a)..... 6 CONTAMINATED REFRIGERANT ...................... 6 General Refrigerant Precautions ............................. 7 Precautions for Refrigerant Connection .................. 8 ABOUT ONE-TOUCH JOINT ............................... 8 FEATURES OF NEW TYPE REFRIGERANT CONNECTION ................................................... 10 O-RING AND REFRIGERANT CONNECTION....11 Precautions for Servicing Compressor .................. 13 Precautions for Service Equipment ....................... 13 RECOVERY / RECYCLING EQUIPMENT ......... 13 ELECTRICAL LEAK DETECTOR ...................... 13 VACUUM PUMP ................................................ 13 MANIFOLD GAUGE SET ................................... 13 SERVICE HOSES .............................................. 14 SERVICE COUPLERS ....................................... 14 REFRIGERANT WEIGHT SCALE ..................... 14 CHARGING CYLINDER ..................................... 14 Precautions for Leak Detection Dye ...................... 15 IDENTIFICATION ............................................... 15 IDENTIFICATION LABEL FOR VEHICLE .......... 15 PREPARATION ........................................................ 16 Special Service Tools ............................................ 16 HFC-134a (R-134a) Service Tools and Equipmen.t.. 17 Commercial Service Tools ..................................... 19 REFRIGERATION SYSTEM .................................... 20 Refrigerant Cycle .................................................. 20 REFRIGERANT FLOW ...................................... 20 FREEZE PROTECTION .................................... 20 Refrigerant System Protection .............................. 20 REFRIGERANT PRESSURE SENSOR ............ 20 PRESSURE RELIEF VALVE .............................. 20 F Component Layout ................................................ 21 LUBRICANT ............................................................. 22 Maintenance of Lubricant Quantity in Compressor... 22 G LUBRICANT ....................................................... 22 LUBRICANT RETURN OPERATION ................. 22 LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT H COMPRESSOR ................................................. 23 LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT ...................... 23 I AIR CONDITIONER CONTROL .............................. 25 Description of Air Conditioner LAN Control System... 25 System Construction ............................................. 25 ATC OPERATION ....................................................... 25 TRANSMISSION DATA AND TRANSMISSION ORDER .............................................................. 26 K AIR MIX DOOR CONTROL (AUTOMATIC TEM- PERATURE CONTROL) .................................... 27 FAN SPEED CONTROL ..................................... 27 INTAKE DOOR CONTROL ................................ 27 L MODE DOOR CONTROL .................................. 27 MAGNET CLUTCH CONTROL .......................... 28 SELF-DIAGNOSIS SYSTEM ............................. 28 M Description of Control System ............................... 29 Control Operation .................................................. 29 DISPLAY SCREEN ............................................. 30 AUTO SWITCH .................................................. 30 TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL) (DRIVER SIDE) ... 30 TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL) (PASSENGER SIDE) .................................................................. 30 RECIRCULATION (REC) SWITCH .................... 30 FRESH (FRE) SWITCH ..................................... 30 DEFROSTER (DEF) SWITCH ............................ 30 REAR WINDOW DEFOGGER SWITCH ............ 30 OFF SWITCH ..................................................... 30 A/C SWITCH ...................................................... 30 MODE SWITCH ................................................. 30 Revision: 2006 July ATC-1 2007 Murano FAN CONTROL DIAL ......................................... 30 DUAL SWITCH ................................................... 30 Fail-safe Function .................................................. 31 Discharge Air Flow ................................................ 32 System Description ................................................ 33 SWITCHES AND THEIR CONTROL FUNCTION... 33 CAN Communication System Description ............. 34 TROUBLE DIAGNOSIS ........................................... 35 CONSULT-II Function (BCM) ................................. 35 CONSULT-II BASIC OPERATION ...................... 35 DATA MONITOR ................................................. 35 How to Perform Trouble Diagnosis for Quick and Accurate Repair ..................................................... 36 WORK FLOW ..................................................... 36 SYMPTOM TABLE ............................................. 36 ComponentParts and Harness Connector Location... 37 ENGINE COMPARTMENT ................................. 37 PASSENGER COMPARTMENT ......................... 38 Schematic .............................................................. 39 Wiring Diagram -- A/C -- ...................................... 40 Auto Amp. Terminals and Reference Value ........... 45 PIN CONNECTOR TERMINAL LAYOUT ........... 45 TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP. ....................... 45 Self-diagnosis Function ......................................... 47 DESCRIPTION ................................................... 47 FUNCTION CONFIRMATION PROCEDURE ..... 48 AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER .......................................... 53 AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER .......................................... 54 AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION ................................................ 54 Operational Check ................................................. 55 CHECKING MEMORY FUNCTION .................... 55 CHECKING BLOWER ........................................ 55 CHECKING DISCHARGE AIR ........................... 55 CHECKING INTAKE AIR .................................... 55 CHECKING TEMPERATURE DECREASE ........ 55 CHECKING TEMPERATURE INCREASE ......... 56 CHECK A/C SWITCH ......................................... 56 CHECKING AUTO MODE .................................. 56 Power Supply and Ground Circuit for Auto Amp. ... 57 INSPECTION FLOW .......................................... 57 COMPONENT DESCRIPTION ........................... 57 DIAGNOSIS PROCEDURE FOR A/C SYSTEM... 58 LAN System Circuit ............................................... 59 DIAGNOSIS PROCEDURE FOR LAN CIRCUIT... 59 Mode Door Motor Circuit ....................................... 63 INSPECTION FLOW .......................................... 63 SYSTEM DESCRIPTION ................................... 64 COMPONENT DESCRIPTION ........................... 65 DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR .............................................................. 65 Air Mix Door Motor Circuit ..................................... 66 INSPECTION FLOW .......................................... 66 SYSTEM DESCRIPTION ................................... 67 COMPONENT DESCRIPTION ........................... 68 DIAGNOSISPROCEDUREFORAIRMIXDOOR... 68 Air Mix Door Motor PBR Circuit .............................68 DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR ......................................................68 Intake Door Motor Circuit .......................................69 INSPECTION FLOW ...........................................69 SYSTEM DESCRIPTION ....................................70 COMPONENT DESCRIPTION ...........................71 DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR ...............................................................71 Blower Motor Circuit ...............................................72 INSPECTION FLOW ...........................................72 SYSTEM DESCRIPTION ....................................73 COMPONENT DESCRIPTION ...........................74 DIAGNOSIS PROCEDURE FOR BLOWER MOTOR ...............................................................74 COMPONENT INSPECTION ..............................76 Magnet Clutch Circuit .............................................77 INSPECTION FLOW ...........................................77 SYSTEM DESCRIPTION ....................................78 DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH .............................................................78 COMPONENT INSPECTION ..............................82 Insufficient Cooling .................................................83 INSPECTION FLOW ...........................................83 PERFORMANCE TEST DIAGNOSIS .................85 PERFORMANCE CHART ...................................87 TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE ..................................................................88 Insufficient Heating ................................................91 INSPECTION FLOW ...........................................91 Noise ......................................................................92 INSPECTION FLOW ...........................................92 Self-diagnosis ........................................................93 INSPECTION FLOW ...........................................93 Memory Function ...................................................94 INSPECTION FLOW ...........................................94 Ambient Sensor Circuit ..........................................95 COMPONENT DESCRIPTION ...........................95 AMBIENT TEMPERATURE INPUT PROCESS...95 DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR .............................................................95 COMPONENT INSPECTION ..............................97 In-vehicle Sensor Circuit ........................................98 COMPONENT DESCRIPTION ...........................98 DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR .............................................................99 COMPONENT INSPECTION ............................100 Sunload Sensor Circuit ........................................101 COMPONENT DESCRIPTION .........................101 SUNLOAD INPUT PROCESS ..........................101 DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR ...........................................................101 COMPONENT INSPECTION ............................103 Intake Sensor Circuit ............................................104 COMPONENT DESCRIPTION .........................104 DIAGNOSIS PROCEDURE FOR INTAKE SENSOR ..................................................................104 COMPONENT INSPECTION ............................105 Revision: 2006 July ATC-2 2007 Murano CONTROLLER ...................................................... 106 Removal and Installation of A/C and AV Switch .. 106 REMOVAL ........................................................ 106 INSTALLATION ................................................ 106 AUTO AMP ............................................................ 107 Removal and Installation of Unified Meter and A/C Amp. .................................................................... 107 REMOVAL ........................................................ 107 INSTALLATION ................................................ 107 AMBIENT SENSOR ............................................... 108 Removal and Installation ..................................... 108 REMOVAL ........................................................ 108 INSTALLATION ................................................ 108 IN-VEHICLE SENSOR ........................................... 109 Removal and Installation ..................................... 109 REMOVAL ........................................................ 109 INSTALLATION ................................................ 109 SUNLOAD SENSOR ..............................................110 Removal and Installation ......................................110 REMOVAL .........................................................110 INSTALLATION .................................................110 INTAKE SENSOR ................................................... 111 Removal and Installation ...................................... 111 REMOVAL ......................................................... 111 INSTALLATION ................................................. 111 BLOWER UNIT .......................................................112 Removal and Installation ......................................112 REMOVAL .........................................................112 INSTALLATION .................................................112 Disassembly and Assembly .................................113 Removal and Installation of Blower Duct .............114 REMOVAL .........................................................114 INSTALLATION .................................................114 BLOWER MOTOR ..................................................115 Removal and Installation ......................................115 REMOVAL .........................................................115 INSTALLATION .................................................115 INTAKE DOOR MOTOR .........................................116 Removal and Installation ......................................116 REMOVAL .........................................................116 INSTALLATION .................................................116 IN-CABIN MICROFILTER .......................................117 Removal and Installation ......................................117 FUNCTION ........................................................117 REPLACEMENT TIMING ..................................117 REPLACEMENT PROCEDURES .....................117 HEATER & COOLING UNIT ASSEMBLY ..............118 Removal and Installation ......................................118 REMOVAL .........................................................118 INSTALLATION .................................................119 Disassembly and Assembly ................................ 120 MODE DOOR MOTOR .......................................... 122 Removal and Installation ..................................... 122 REMOVAL ........................................................ 122 INSTALLATION ................................................ 122 AIR MIX DOOR MOTOR ........................................ 123 Removal and Installation ..................................... 123 REMOVAL ........................................................ 123 INSTALLATION ................................................ 123 HEATER CORE ...................................................... 124 Removal and Installation ..................................... 124 A REMOVAL ........................................................ 124 INSTALLATION ................................................ 124 DUCTS AND GRILLES .......................................... 125 B Removal and Installation ..................................... 125 COMPONENT LAYOUT ................................... 125 REMOVAL ........................................................ 125 INSTALLATION ................................................ 130 C REFRIGERANT LINES .......................................... 131 HFC-134a (R-134a) Service Procedure .............. 131 SETTING OF SERVICE TOOLS AND EQUIP- D MENT ............................................................... 131 Components ........................................................ 133 Removal and Installation of Compressor ............. 134 E REMOVAL ........................................................ 134 INSTALLATION ................................................ 134 Check Disc to Pulley Clearance .......................... 135 Removal and Installation of Low-pressure Flexible F Hose .................................................................... 135 REMOVAL ........................................................ 135 INSTALLATION ................................................ 135 G Removal and Installation of High-pressure Flexible Hose .................................................................... 136 REMOVAL ........................................................ 136 H INSTALLATION ................................................ 136 Removal and Installation of Low-pressure Pipe 1 (Engine Compartment) ........................................ 137 REMOVAL ........................................................ 137 I INSTALLATION ................................................ 137 Removal and Installation of High-pressure Pipe 1 (Engine Compartment) ........................................ 138 ATC REMOVAL ........................................................ 138 INSTALLATION ................................................ 138 Removal and Installation of Low-pressure Pipe 2 K and High-pressure Pipe 2 .................................... 139 REMOVAL ........................................................ 139 INSTALLATION ................................................ 140 L Removal and Installation of Liquid Tank .............. 140 REMOVAL ........................................................ 140 INSTALLATION ................................................ 141 Removal and Installation of Condenser ............... 141 M REMOVAL ........................................................ 141 INSTALLATION ................................................ 142 Removal and Installation of Refrigerant Pressure Sensor ................................................................. 142 REMOVAL ........................................................ 142 INSTALLATION ................................................ 142 Removal and Installation of Evaporator ............... 142 REMOVAL ........................................................ 142 INSTALLATION ................................................ 143 Removal and Installation of Expansion Valve ...... 143 REMOVAL ........................................................ 143 INSTALLATION ................................................ 143 Checking for Refrigerant Leaks ........................... 144 Checking System for Leaks Using the Fluorescent Leak Detector ...................................................... 144 Revision: 2006 July ATC-3 2007 Murano Dye Injection ........................................................ 144 Electrical Leak Detector ....................................... 145 PRECAUTIONS FOR HANDLING LEAK DETECTOR ...................................................... 145 CHECKING PROCEDURE ............................... 146 SERVICE DATA AND SPECIFICATIONS (SDS) ... 148 Compressor .........................................................148 Lubricant ..............................................................148 Refrigerant ...........................................................148 Engine Idling Speed .............................................148 Belt Tension .........................................................148 Revision: 2006 July ATC-4 2007 Murano PRECAUTIONS PRECAUTIONS PFP:00001 Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT A BELT PRE-TENSIONER" NJS000A2 The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. C Information necessary to service the system safely is included in the SRS and SB section of this Service Man- ual. WARNING: D q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be per- formed by an authorized NISSAN/INFINITI dealer. E q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per- sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the SRS section. F q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. G Precautions Necessary for Steering Wheel Rotation After Battery Disconnect NJS000CQ NOTE: H q This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM - NATS). q Remove and install all control units after disconnecting both battery cables with the ignition knob in the LOCK position. I q Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results. ATC For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock mechanism is adopted on the key cylinder. For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible. K If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation. OPERATION PROCEDURE L 1. Connect both battery cables. NOTE: Supply power using jumper cables if battery is discharged. M 2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ACC position. At this time, the steering lock will be released. 3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated. 4. Perform the necessary repair operation. 5. When the repair work is completed, return the ignition switch to the LOCK position before connecting the battery cables. (At this time, the steering lock mechanism will engage.) 6. Perform a self-diagnosis check of all control units using CONSULT-II. Revision: 2006 July ATC-5 2007 Murano PRECAUTIONS Precautions for Procedures without Cowl Top Cover When performing the procedure after removing cowl top cover, cover the lower end of windshield with urethane, etc. NJS000CR PIIB3706J Precautions for Working with HFC-134a (R-134a) NJS000A3 CAUTION: q CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants are mixed and compressor malfunction is likely to occur, refer to "CONTAMINATED REFRIGERANT" below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharging equipment and Refrigerant Identifier. q Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If lubricant other than that specified is used, compressor malfunction is likely to occur. q The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atmosphere. The following handling precautions must be observed: When removing refrigerant components from a vehicle, immediately cap (seal) the component to minimize the entry of moisture from the atmosphere. When installing refrigerant components to a vehicle, never remove the caps (unseal) until just before connecting the components. Connect all refrigerant loop components as quickly as possible to minimize the entry of moisture into system. Only use the specified lubricant from a sealed container. Immediately reseal containers of lubricant. Without proper sealing, lubricant will become moisture saturated and should not be used. Never allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrene foam parts. Damage may result. CONTAMINATED REFRIGERANT If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, take appropriate steps shown below: q Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into the atmosphere. q Explain that recovery of the contaminated refrigerant could damage service equipment and refrigerant supply. q Suggest the customer return the vehicle to the location of previous service where the contamination may have occurred. q In case of repairing, recover the refrigerant using only dedicated equipment and containers. Never recover contaminated refrigerant into the existing service equipment. If the facility does not have dedicated recovery equipment, contact a local refrigerant product retailer for available service. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition, replacement of all refrigerant system components on the vehicle is recommended. q If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact Nissan Customer Affairs for further assistance. Revision: 2006 July ATC-6 2007 Murano PRECAUTIONS General Refrigerant Precautions NJS000A4 WARNING: A q Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat. Remove HFC-134a (R-134a) from the A/C system, using certified service equipment meet- ing requirements of SAEJ-2210 [HFC-134a (R-134a) recycling equipment], or J-2209 [HFC-134a (R- B 134a) recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming service. Additional health and safety information may be obtained from refrigerant and lubricant manufacturers. C q Never release refrigerant into the air. Use approved recovery/recycling equipment to capture the refrigerant every time an air conditioning system is discharged. q Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or D air conditioning system. q Never store or heat refrigerant containers above 52°C (126°F). q Never heat a refrigerant container with an open flame; if container warming is required, place the E bottom of the container in a warm pail of water. q Never intentionally drop, puncture, or incinerate refrigerant containers. q Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns. F q Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suffocation. q Never pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition- G ing systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a) have been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or property damage. Additional health and safety information may be obtained from refrigerant manufacturers. H I ATC K L M Revision: 2006 July ATC-7 2007 Murano PRECAUTIONS Precautions for Refrigerant Connection NJS000A6 A new type refrigerant connection has been introduced to all refrigerant lines except the following location. q Expansion valve to evaporator q Refrigerant pressure sensor to condenser ABOUT ONE-TOUCH JOINT Description q One-touch joints are pipe joints which do not require tools during piping connection. q Unlike conventional connection methods using union nuts and flanges, controlling tightening torque at connection point is not necessary. q When removing a pipe joint, use a disconnector. COMPONENT PARTS FUNCTIONS OF COMPONENT PARTS RJIA4383J 1 Pipe (Male side) 2 Garter spring 3 Indicator ring 4 O-ring 5 Pipe (Female side) q Retains O-rings (4). q Retains garter spring (2) in cage (A). Anchors female side piping (5). When connection is made properly, this is ejected from male-side piping (1). (This part is no longer necessary after connection.) Seals connection point. (Not reusable) q Seals connection by compressing O-rings (4). q Anchors piping connection using flare (B) and garter spring (2). NOTE: q Garter spring (2) cannot be removed from cage (A) of male-side piping. q Indicator ring (3) remains near piping connection point, however, this is not a malfunction. (This is to check piping connection during factory assembly.) Revision: 2006 July ATC-8 2007 Murano PRECAUTIONS REMOVAL A B C D E F SJIA0106E 1. Clean piping connection point, and set a disconnector. G 2. Slide disconnector in axial direction of piping, and stretch garter spring with tapered point of disconnector. 3. Slide disconnector farther so that inside diameter of garter spring becomes larger than outside diameter of female-side piping flare. Then male-side piping can be disconnected. H INSTALLATION I ATC K L M SJIA0107E 1. Clean piping connection points, and insert male-side piping into female-side piping. 2. Push inserted male-side piping harder so that female-side piping flare stretches garter spring. 3. If inside diameter of garter spring becomes larger than outside diameter of female-side piping flare, garter spring seats on flare. Then, it fits in between male-side piping cage and female-side piping flare to anchor piping connection point. NOTE: When garter spring seats on flare, and fits in between male-side piping cage and female-side piping flare, it clicks. CAUTION: q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. q Insert piping securely until a click is heard. Revision: 2006 July ATC-9 2007 Murano PRECAUTIONS q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. NOTE: One-touch joint connection is used in points below. q Low-pressure pipe 1 to low-pressure pipe 2 (O-ring size: 16) q High-pressure pipe 1 to high-pressure pipe 2 (O-ring size: 8) FEATURES OF NEW TYPE REFRIGERANT CONNECTION q The O-ring has been relocated. It has also been provided with a groove for proper installation. This eliminates the possibility of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing characteristics. q The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facilitating piping connections. SHA815E Revision: 2006 July ATC-10 2007 Murano PRECAUTIONS O-RING AND REFRIGERANT CONNECTION A B C D E F G H I ATC RJIA1744E CAUTION: The new and former refrigerant connections use different O-ring configurations. Never confuse Orings since they are not interchangeable. If a wrong O-ring is installed, refrigerant may leak at the con- K nection. O-Ring Part Numbers and Specifications L Connection type Piping connection point Part number QTY O-ring size Low-pressure pipe 1 to low-pressure pipe 2 (One-touch joint) 92473 N8221 2 16 M Low-pressure pipe 2 to expansion valve 92473 N8210 1 16 High-pressure pipe 1 to high-pressure pipe 2 (One-touch joint) 92471 N8221 2 8 High-pressure pipe 2 to expansion valve 92471 N8210 1 8 Condenser to high-pressure flexible hose 92472 N8210 1 12 New Condenser to high-pressure pipe 1 92471 N8210 1 8 Low-pressure flexible hose to low-pressure pipe 1 92474 N8210 1 19 Compressor to low-pressure flexible hose 92474 N8210 1 19 Compressor to high-pressure flexible hose 92472 N8210 1 12 Liquid tank to condenser pipe Inlet 1 92471 N8210 8 Outlet 1 Refrigerant pressure sensor to condenser J2476 89956 1 10 Former Expansion valve to evaporator Inlet 92475 71L00 1 12 Outlet 92475 72L00 1 16 Revision: 2006 July ATC-11 2007 Murano PRECAUTIONS WARNING: Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it. CAUTION: When replacing or cleaning refrigerant cycle components, observe the following. q When the compressor is removed, store it in the same way at it is when mounted on the car. Failure to do so will cause lubricant to enter the low-pressure chamber. q When connecting tubes, always use a torque wrench and a back-up wrench. q After disconnecting tubes, immediately plug all openings to prevent entry of dust and moisture. q When installing an air conditioner in the vehicle, connect the pipes at the final stage of the operation. Never remove the seal caps of pipes and other components until just before required for connection. q Allow components stored in cool areas to warm to working area temperature before removing seal caps. This prevents condensation from forming inside A/C components. q Thoroughly remove moisture from the refrigeration system before charging the refrigerant. q Always replace used O-rings. q When connecting tubes, apply lubricant to circle of the O-rings shown in illustration. Be careful not to apply lubricant to threaded portion. Name : Nissan A/C System Oil Type S q O-ring must be closely attached to the groove of tube. q When replacing the O-ring, be careful not to damage O-ring and tube. q Connect tube until a click can be heard, then tighten the nut or bolt by hand. Make sure that the Oring is installed to tube correctly. q After connecting line, perform leak test and make sure that there is no leakage from connections. When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten connections of seal seat to the specified torque. Revision: 2006 July ATC-12 RHA861F 2007 Murano PRECAUTIONS Precautions for Servicing Compressor q Plug all openings to prevent moisture and foreign matter from entering. NJS000A7 A q When the compressor is removed, store it in the same way at it is when mounted on the car. q When replacing or repairing compressor, follow "Maintenance of Lubricant Quantity in Compres- B sor" exactly. Refer to ATC-22, "Maintenance of Lubricant Quantity in Compressor" . q Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with lubri- cant, wipe it off by using a clean waste cloth moistened with thinner. C q After compressor service operation, turn the compressor shaft by hand more than five turns in both directions. This will equally distribute lubricant inside the compressor. After the compressor is installed, let the engine idle and operate the compressor for one hour. q After replacing the compressor magnet clutch, apply voltage to the new one and check for normal D operation. Precautions for Service Equipment RECOVERY / RECYCLING EQUIPMENT NJS000A8 E Be certain to follow the manufacturer's instructions for machine operation and machine maintenance. Never introduce any refrigerant other than that specified into the machine. F ELECTRICAL LEAK DETECTOR Be certain to follow the manufacturer's instructions for tester operation and tester maintenance. VACUUM PUMP G The lubricant contained inside the vacuum pump is not compatible with the specified lubricant for HFC-134a (R-134a) A/C systems. The vent side of the vacuum pump is exposed to atmospheric pres- H sure. So the vacuum pump lubricant may migrate out of the pump into the service hose. This is possible when the pump is switched off after evacuation (vacuuming) and hose is connected to it. I To prevent this migration, use a manual valve placed near the hoseto-pump connection, as follows. q Usually vacuum pumps have a manual isolator valve as part of ATC the pump. Close this valve to isolate the service hose from the pump. q For pumps without an isolator, use a hose equipped with a man- K ual shut-off valve near the pump end. Close the valve to isolate the hose from the pump. q If the hose has an automatic shut-off valve, disconnect the hose L from the pump. As long as the hose is connected, the valve is open and lubricating oil may migrate. Some one-way valves open when vacuum is applied and close under no vacuum condition. Such valves may restrict the pump's M ability to pull a deep vacuum and are not recommended. MANIFOLD GAUGE SET Be certain that the gauge face indicates HFC-134a or R-134a. Be sure the gauge set has 1/2-16 ACME threaded connections for service hoses. Confirm the set has been used only with refrigerant HFC-134a (R-134a) and specified lubricants. RHA270DA Revision: 2006 July ATC-13 SHA533D 2007 Murano PRECAUTIONS SERVICE HOSES Be certain that the service hoses display the markings described (colored hose with black stripe). All hoses must include positive shutoff devices (either manual or automatic) near the end of the hoses opposite to the manifold gauge. SERVICE COUPLERS Never attempt to connect HFC-134a (R-134a) service couplers to a CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will not properly connect to the CFC-12 (R-12) system. However, if an improper connection is attempted, discharging and contamination may occur. Shut-off valve rotation Clockwise Counterclockwise A/C service valve Open Close REFRIGERANT WEIGHT SCALE Verify that no refrigerant other than HFC-134a (R-134a) and specified lubricants have been used with the scale. If the scale controls refrigerant flow electronically, the hose fitting must be 1/2 -16 ACME. RHA272D RHA273D RHA274D CHARGING CYLINDER Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an electronic scale or of quality recycle/recharge equipment. Revision: 2006 July ATC-14 2007 Murano PRECAUTIONS Precautions for Leak Detection Dye NJS000A9 q The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet A (UV) lamp is required to illuminate the dye when inspecting for leaks. q Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of the fluorescent dye. B q The fluorescent dye leak detector is not a replacement for an electrical leak detector (SST: J-41995). The fluorescent dye leak detector should be used in conjunction with an electrical leak detector (SST: J-41995) to pin-point refrigerant leaks. C q For the purpose of safety and customer's satisfaction, read and follow all manufacture's operating instructions and precautions prior to performing the work. q A compressor shaft seal should not necessarily be repaired because of dye seepage. The compressor D shaft seal should only be repaired after confirming the leak with an electrical leak detector (SST: J-41995). q Always remove any remaining dye from the leak area after repairs are completed to avoid a misdiagnosis during a future service. E q Never allow dye to come into contact with painted body panels or interior components. If dye is spilled, clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period of time cannot be removed. F q Never spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.). q Never use more than one refrigerant dye bottle (1/4 ounce /7.4 cc) per A/C system. q Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Never use G HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detection dye in HFC-134a (R-134a) A/C system, or A/C system damage may result. q The fluorescent properties of the dye will remain for three years or a little over unless a compressor mal- H function occurs. IDENTIFICATION NOTE: I Vehicles with factory installed fluorescent dye have a green label. Vehicles without factory installed fluorescent dye have a blue label. IDENTIFICATION LABEL FOR VEHICLE ATC Vehicles with factory installed fluorescent dye have the identification label on the front side of hood. K L M Revision: 2006 July ATC-15 2007 Murano PREPARATION PREPARATION PFP:00002 Special Service Tools NJS000AB The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here. Tool number (Kent-Moore No.) Tool name Description 9253089908 (for high-pressure pipe 1) ( - ) 9253089912 (for high-pressure flexible hose) ( - ) 9253089916 (for low-pressure pipe 1 and low-pressure flexible hose) ( - ) Disconnector tool set (J-45815) Disconnect one-touch joint connection SJIA1274E Revision: 2006 July ATC-16 2007 Murano PREPARATION HFC-134a (R-134a) Service Tools and Equipment NJS000AC Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/or A its lubricant. Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/lubri- cant. B Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed use of the refrigerants/lubricant. C Never use adapters that convert one size fitting to another: refrigerant/lubricant contamination occurs and compressor malfunction may result. Tool number (Kent-Moore No.) Tool name D Description HFC-134a (R-134a) refrigerant Nissan A/C System Oil Type S (DH-PS) S-NT196 S-NT197 E Container color: Light blue Container marking: HFC-134a (R-134a) Fitting size: Thread size F q Large container 1/2 -16 ACME G Type: Polyalkylene glycol oil (PAG), type S (DH-PS) Application: HFC-134a (R-134a) swash plate H compressors (Nissan only) Capacity: 40 m (1.4 US fl oz., 1.4 Imp fl oz.) I (ACR2005-NI) ACR5 A/C Service Center WJIA0293E Function: Refrigerant recovery, recycling and recharging ATC K L (J-41995) Electrical A/C leak detector Power supply: M DC 12 V (Battery terminal) AHA281A Revision: 2006 July ATC-17 2007 Murano Tool number (Kent-Moore No.) Tool name (J-43926) Refrigerant dye leak detection kit Kit includes: (J-42220) UV lamp and UV safety goggles (J-41459) HFC-134a (R-134a) dye injector Use with J-41447, 1/4 ounce bottle (J-41447) HFC-134a (R-134a) fluorescent leak detection dye (Box of 24, 1/4 ounce bottles) (J-43872) Refrigerant dye cleaner (J-42220) UV lamp and UV safety goggles (J-41447) HFC-134a (R-134a) fluorescent leak detection dye (Box of 24, 1/4 ounce bottles) (J-41459) HFC-134a (R-134a) dye injector Use with J-41447, 1/4 ounce bottle (J-43872) Refrigerant dye cleaner (J-39183) Manifold gauge set (with hoses and couplers) Revision: 2006 July PREPARATION Description Power supply: DC 12 V (Battery terminal) ZHA200H SHA438F SHA439F Power supply: DC 12 V (Battery terminal) For checking refrigerant leak when fluorescent dye is installed in A/C system Includes: UV lamp and UV safety goggles Application: For HFC-134a (R-134a) PAG oil Container: 1/4 ounce (7.4 cc) bottle (Includes self-adhesive dye identification labels for affixing to vehicle after charging system with dye.) SHA440F For injecting 1/4 ounce of fluorescent leak detection dye into A/C system SHA441F For cleaning dye spills Identification: q The gauge face indicates HFC-134a (R-134a). Fitting size: Thread size q 1/2 -16 ACME ATC-18 RJIA0196E 2007 Murano Tool number (Kent-Moore No.) Tool name Service hoses q High-pressure side hose (J-39501-72) q Low-pressure side hose (J-39502-72) q Utility hose (J-39476-72) Service couplers q High-pressure side coupler (J-39500-20) q Low-pressure side coupler (J-39500-24) PREPARATION S-NT201 S-NT202 (J-39650) Refrigerant weight scale (J-39649) Vacuum pump (Including the isolator valve) Commercial Service Tools Tool name S-NT200 S-NT203 Refrigerant identifier equipment Description A Hose color: q Low hose: Blue with black stripe B q High hose: Red with black stripe q Utility hose: Yellow with black stripe or green with black stripe C Hose fitting to gauge: q 1/2 -16 ACME D Hose fitting to service hose: M14 x 1.5 fitting is optional or E permanently attached. F For measuring of refrigerant G Fitting size: Thread size 1/2 -16 ACME H Capacity: q Air displacement: 4 CFM q Micron rating: 20 microns q Oil capacity: 482 g (17 oz.) Fitting size: Thread size q 1/2 -16 ACME Description I ATC NJS000AD K L M Checking for refrigerant purity and system contamination Power tool Revision: 2006 July RJIA0197E PBIC0190E For loosening bolts and nuts ATC-19 2007 Murano REFRIGERATION SYSTEM REFRIGERATION SYSTEM PFP:KA990 Refrigerant Cycle REFRIGERANT FLOW NJS000AE The refrigerant flows from the compressor, through the condenser with liquid tank, through the evaporator, and back to the compressor. The refrigerant evaporation in the evaporator is controlled by an externally equalized expansion valve, located inside the evaporator case. FREEZE PROTECTION To prevent evaporator frozen up, the evaporator air temperature is monitored, and the voltage signal to the unified meter and A/C amp. will make the A/C relay go OFF and stop the compressor. Refrigerant System Protection REFRIGERANT PRESSURE SENSOR NJS000AF The refrigerant system is protected against excessively high- or low-pressure by the refrigerant pressure sensor, located on the condenser. If the system pressure rises above, or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM. ECM makes the A/C relay go OFF and stops the compressor when pressure on the high-pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm2 , 398 psi), or below about 134 kPa (1.4 kg/cm2 , 20 psi). PRESSURE RELIEF VALVE The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor. When the pressure of refrigerant in the system increases to an unusual level [more than 3,727 kPa (38 kg/cm2 , 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere. Revision: 2006 July ATC-20 RJIA1745E 2007 Murano Component Layout REFRIGERATION SYSTEM NJS000AG A B C D E F G H I ATC K L M Revision: 2006 July ATC-21 RJIA1746E 2007 Murano LUBRICANT LUBRICANT PFP:KLG00 Maintenance of Lubricant Quantity in Compressor NJS000AH The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compressor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the specified amount. If lubricant quantity is not maintained properly, the following malfunctions may result: q Lack of lubricant: May lead to a seized compressor. q Excessive lubricant: Inadequate cooling (thermal exchange interference) LUBRICANT Name : NISSAN A/C System Oil Type S LUBRICANT RETURN OPERATION Adjust the lubricant quantity according to the test group shown below. 1. CHECK LUBRICANT RETURN OPERATION Can lubricant return operation be performed? q A/C system works properly. q There is no evidence of a large amount of lubricant leakage. CAUTION: If excessive lubricant leakage is noted, never perform the lubricant return operation. OK or NG OK >> GO TO 2. NG >> GO TO 3. 2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS 1. Start the engine, and set to the following conditions: Engine speed: Idling to 1,200 rpm A/C switch: ON Blower speed: Max. position Temp. control: Optional [Set so that intake air temperature is 25 to 30°C (77 to 86°F).] Intake position: Recirculation (REC) 2. Perform lubricant return operation for about 10 minutes. 3. Stop the engine. >> GO TO 3. 3. CHECK REPLACEMENT PART Should the compressor be replaced? YES NO >> GO TO ATC-23, "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT" . >> GO TO ATC-23, "LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR" . Revision: 2006 July ATC-22 2007 Murano LUBRICANT LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COM- PRESSOR A After replacing any of the following major components, add the correct amount of lubricant to the system. Amount of lubricant to be added: Lubricant to be added to system B Part replaced Amount of lubricant Remarks Evaporator m (US fl oz., Imp fl oz.) 75 (2.5, 2.6) C -- Condenser 35 (1.2, 1.2) -- Liquid tank 10 (0.3, 0.4) In case of refrigerant leak 30 (1.0, 1.1) -- *1: If the refrigerant leak is small, no addition of lubricant is needed. -- D Large leak Small leak*1 E LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACEMENT 1. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg- F ing equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equip- ment lines. 2. Connect recovery/recycling recharging equipment to vehicle. Confirm refrigerant purity in supply tank G using recovery/recycling recharging equipment and refrigerant identifier. If NG, refer to ATC-6, "CONTAMINATED REFRIGERANT" . 3. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrigerant identifier. If NG, refer to ATC-6, "CONTAMINATED REFRIGERANT" . H 4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into the recovery/recycling equipment. 5. Drain the lubricant from the old (removed) compressor into a graduated container and recover the amount I of lubricant drained. 6. Drain the lubricant from the new compressor into a separate, clean container. ATC 7. Measure an amount of new lubricant installed equal to amount drained from old compressor. Add this lubricant to new compressor through the suction port opening. 8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant to new compressor through the suction port opening. K 9. If the liquid tank also needs to be replaced, add another 5 m (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant at this time. Do not add this 5 m (0.2 US fl oz., 0.2 Imp fl oz.) of lubricant when replaces the compressor only. L M Revision: 2006 July ATC-23 2007 Murano LUBRICANT RJIA3578E Revision: 2006 July ATC-24 2007 Murano AIR CONDITIONER CONTROL AIR CONDITIONER CONTROL Description of Air Conditioner LAN Control System PFP:27500 A NJS000AI The LAN (Local Area Network) system consists of unified meter and A/C amp., mode door motor, air mix door motors and intake door motor. B A configuration of these components is shown in the figure below. C D E SJIA0262E System Construction NJS000AJ F A small network is constructed between the unified meter and A/C amp., air mix door motors, mode door motor and intake door motor. The unified meter and A/C amp. and motors are connected by data transmission lines and motor power supply lines. The LAN network is built through the ground circuits of the each door G motor. Addresses, motor opening angle signals, motor stop signals and error checking messages are all transmitted through the data transmission lines connecting the unified meter and A/C amp. and the each door motor. H The following functions are contained in LCUs built into the air mix door motors, the mode door motor and the intake door motor. q Address I q Motor opening angle signals q Data transmission q Motor stop and drive decision ATC q Opening angle sensor (PBR function) q Comparison q Decision (Unified meter and A/C amp. indicated value and motor opening angle comparison) K L M RJIA1747E OPERATION The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp. sends mode door, air mix door and intake door opening angle data to the mode door motor LCU, air mix door motor LCU and intake door motor LCU. The mode door motor, air mix door motors and intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the unified meter and A/C amp. and each of the motor position sensors is compared by the LCUs in each door motor with the existing decision and opening angles. Subsequently, HOT/COLD, DEF/VENT or FRE/REC operation is selected. The new selection data are returned to the unified meter and A/C amp. Revision: 2006 July ATC-25 2007 Murano AIR CONDITIONER CONTROL RJIA1748E TRANSMISSION DATA AND TRANSMISSION ORDER Unified meter and A/C amp. data are transmitted consecutively to each of the door motors following the form shown in figure below. Start: Initial compulsory signal sent to each of the door motors. Address: Data sent from the unified meter and A/C amp. are selected according to data-based decisions made by the air mix door motor, mode door motor and intake door motor. If the addresses are identical, the opening angle data and error check signals are received by the door motor LCUs. The LCUs then make the appropriate error decision. If the opening angle data have no error, door control begins. If an error exists, the received data are rejected and corrected data received. Finally, door control is based upon the corrected opening angle data. Opening Angle: Data that shows the indicated door opening angle of each door motor. Error Check: In this procedure, transmitted and received data are checked for errors. Error data are then compiled. The error check prevents corrupted data from being used by the air mix door motor, the mode door motor and the intake door motor. Error data can be related to the following symptoms. q Malfunction of electrical frequency q Poor electrical connections q Signal leakage from transmission lines q Signal level fluctuation Revision: 2006 July ATC-26 2007 Murano AIR CONDITIONER CONTROL Stop Signal: At the end of each transmission, a stop operation, in-operation, or internal malfunction message is delivered to A the unified meter and A/C amp. This completes one data transmission and control cycle. B C D E F G RJIA1749E AIR MIX DOOR CONTROL (AUTOMATIC TEMPERATURE CONTROL) The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined H value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload. FAN SPEED CONTROL I Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera- ture, intake temperature, amount of sunload and air mix door position. When pressing AUTO switch, the blower motor starts to gradually increase air flow volume. When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow- ATC ing. INTAKE DOOR CONTROL K The intake doors are automatically controlled by the temperature setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and ON/OFF operation of the compressor. MODE DOOR CONTROL L The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper- ature, intake temperature and amount of sunload. M Revision: 2006 July ATC-27 2007 Murano AIR CONDITIONER CONTROL MAGNET CLUTCH CONTROL SJIA0630E When A/C switch, AUTO switch or DEF switch is pressed, unified meter and A/C amp. transmits compressor ON signal to BCM. BCM sends compressor ON signal to ECM, via CAN communication. ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant-pressure sensor signal, throttle angle, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to IPDM E/R, via CAN communication. Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate compressor. When sending compressor ON signal to IPDM E/R via CAN communication, ECM simultaneously sends compressor feedback signal to unified meter and A/C amp. via CAN communication. Unified meter and A/C amp., then, uses input compressor feedback signal to control air inlet. SELF-DIAGNOSIS SYSTEM The self-diagnosis system is built into the unified meter and A/C amp. to quickly locate the cause of malfunctions. Revision: 2006 July ATC-28 2007 Murano AIR CONDITIONER CONTROL Description of Control System NJS000AK The control system consists of input sensors, switches, the unified meter and A/C amp. (microcomputer) and A outputs. The relationship of these components is shown in the figure below: B C D E F G H I ATC Control Operation SJIA0518E K NJS000AL L M Revision: 2006 July ATC-29 SJIA1152E 2007 Murano AIR CONDITIONER CONTROL DISPLAY SCREEN The operation status of the system is displayed on the screen. AUTO SWITCH q The compressor, intake doors, air mix doors, mode doors and blower speed are automatically controlled so that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the operator. q When pressing AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automatically controlled. TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL) (DRIVER SIDE) The set temperature is Increased or decreased with this dial. TEMPERATURE CONTROL DIAL (POTENTIO TEMPERATURE CONTROL) (PASSENGER SIDE) q The set temperature is Increased or decreased with this dial. q When the temperature control dial is turned, the DUAL switch LED will automatically illuminate. RECIRCULATION (REC) SWITCH q When REC switch is ON, REC switch LED turns ON, and air inlet is fixed to REC. q When REC switch is ON and is pressed for approximately 1.5 seconds or longer, REC and FRE switch LEDs blink twice. Then, automatic control mode is entered. Inlet status is displayed even during automatically controlled. q When FRE switch is turned ON, or when compressor is turned from ON to OFF, REC switch is automatically turned OFF (fixed to FRE mode). REC mode can be re-entered by pressing REC switch again. q REC switch is not operated when DEF switch is turned ON, or at the D/F position. FRESH (FRE) SWITCH q When FRE switch is ON, FRE switch LED turns ON, and air inlet is fixed to FRE. q When FRE switch is ON and is pressed for approximately 1.5 seconds or longer, REC and FRE switch LEDs blink twice. Then, automatic control mode is entered. Inlet status is displayed even during automatically controlled. q When REC switch is turned ON, FRE switch is automatically turned OFF (fixed to REC mode). FRE mode can be re-entered by pressing FRE switch again. DEFROSTER (DEF) SWITCH Mode doors are set to the defrost position with this switch. Also, intake doors are set to the outside air position, and compressor turns ON. REAR WINDOW DEFOGGER SWITCH When illumination is ON, rear window is defogged. OFF SWITCH Compressor and blower are OFF, the intake doors are set to the fresh air position, and the mode doors are set to the foot position. A/C SWITCH Compressor is ON or OFF. (Pressing the A/C switch when the AUTO switch is ON, will turn OFF the A/C switch and compressor.) MODE SWITCH The air discharge outlets is controlled by this switch. FAN CONTROL DIAL The blower speed is manually controlled with this dial. Seven speeds are available for manual control (as shown on the display screen). DUAL SWITCH q When the DUAL switch LED is illuminated, the driver side and passenger side temperature can each be set independently. q When the DUAL switch LED is not illuminated, the driver side outlet and setting temperature is applied to both sides. Revision: 2006 July ATC-30 2007 Murano AIR CONDITIONER CONTROL Fail-safe Function NJS000AM q If a communication error exists between unified meter and A/C amp. and A/C and AV switch for 30 sec- A onds or longer, air conditioner is controlled under the following conditions: Compressor : ON B Air outlet : AUTO Air inlet : FRE (Fresh) Blower fan speed : AUTO C Set temperature : Setting before communication error occurs Display : OFF D E F G H I ATC K L M Revision: 2006 July ATC-31 2007 Murano Discharge Air Flow AIR CONDITIONER CONTROL NJS000AN Revision: 2006 July ATC-32 RJIA1753E 2007 Murano AIR CONDITIONER CONTROL System Description SWITCHES AND THEIR CONTROL FUNCTION NJS000AO A B C D E F G H SJIA1171E I ATC K L M SJIA1172E Revision: 2006 July ATC-33 2007 Murano AIR CONDITIONER CONTROL CAN Communication System Description NJS000AP CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only. For details, refer to LAN-49, "CAN System Specification Chart" . Revision: 2006 July ATC-34 2007 Murano TROUBLE DIAGNOSIS TROUBLE DIAGNOSIS CONSULT-II Function (BCM) CONSULT-II can display each diagnosis item using the diagnosis test modes shown following. System part Check item, diagnosis mode Description BCM Data monitor Displays BCM input data in real time. PFP:00004 A NJS000AQ B CONSULT-II BASIC OPERATION C Refer to GI-37, "CONSULT-II Start Procedure" . DATA MONITOR D Operation Procedure 1. Touch "AIR CONDITIONER" on "SELECT TEST ITEM" screen. 2. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen. E 3. Touch either "ALL SIGNALS" or "SELECTION FROM MENU" on "DATA MONITOR" screen. All signals Monitors all the items. F Selection from menu Selects and monitors the individual item selected. 4. When "SELECTION FROM MENU" is selected, touch items to be monitored. When "ALL SIGNALS" is selected, all the items will be monitored. G 5. Touch "START". 6. Touch "RECORD" while monitoring, then the status of the monitored item can be recorded. To stop recording, touch "STOP". H Display Item List Monitor item name "operation or unit" Contents I IGN ON SW "ON/OFF" Displays "IGN position (ON)/OFF, ACC position (OFF)" status as judged from ignition switch signal. FAN ON SIG AIR COND SW "ON/OFF" Displays "FAN (ON)/FAN (OFF)" status as judged from blower fan motor switch signal. "ON/OFF" Displays "COMP (ON)/COMP (OFF)" status as judged from A/C switch signal. ATC K L M Revision: 2006 July ATC-35 2007 Murano TROUBLE DIAGNOSIS How to Perform Trouble Diagnosis for Quick and Accurate Repair WORK FLOW NJS000AR *1 ATC-55, "Operational Check" SHA900E SYMPTOM TABLE Symptom Reference Page A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C System. ATC-57, "Power Supply and Ground Circuit for Auto Amp." A/C system cannot be controlled. q Go to Integrated Display System. q Go to Navigation System. AV-101, "A/C and AV Switch SelfDiagnosis Function" (Integrated Display System) AV-172, "A/C and AV Switch SelfDiagnosis Function" (Navigation System) Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door Motor. (LAN) Mode door motor does not operate normally. ATC-63, "Mode Door Motor Cir- cuit" Discharge air temperature does not change. Air mix door motor does not operate normally. Go to Trouble Diagnosis Procedure for Air Mix Door Motor. (LAN) ATC-66, "Air Mix Door Motor Cir- cuit" Intake door does not change. Go to Trouble Diagnosis Procedure for Intake Door Motor. (LAN) Intake door motor does not operate normally. ATC-69, "Intake Door Motor Cir- cuit" Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor. ATC-72, "Blower Motor Circuit" Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch. ATC-77, "Magnet Clutch Circuit" Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling. ATC-83, "Insufficient Cooling" Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating. ATC-91, "Insufficient Heating" Noise Go to Trouble Diagnosis Procedure for Noise. ATC-92, "Noise" Self-diagnosis cannot be performed. Go to Trouble Diagnosis Procedure for Self-diagnosis. ATC-93, "Selfdiagnosis" Memory function does not operate. Go to Trouble Diagnosis Procedure for Memory Function. ATC-94, "Memory Function" Revision: 2006 July ATC-36 2007 Murano TROUBLE DIAGNOSIS Component Parts and Harness Connector Location ENGINE COMPARTMENT NJS000AS A B C D E F G H I ATC K L M Revision: 2006 July ATC-37 SJIA1153E 2007 Murano TROUBLE DIAGNOSIS PASSENGER COMPARTMENT Revision: 2006 July ATC-38 RJIA1757E 2007 Murano Schematic TROUBLE DIAGNOSIS NJS000AT A B C D E F G H I ATC K L M Revision: 2006 July ATC-39 TJWB0165E 2007 Murano TROUBLE DIAGNOSIS Wiring Diagram -- A/C -- NJS000AU Revision: 2006 July ATC-40 TJWB0166E 2007 Murano TROUBLE DIAGNOSIS A B C D E F G H I ATC K L M Revision: 2006 July ATC-41 TJWB0167E 2007 Murano TROUBLE DIAGNOSIS Revision: 2006 July ATC-42 TJWB0168E 2007 Murano TROUBLE DIAGNOSIS A B C D E F G H I ATC K L M Revision: 2006 July ATC-43 TJWB0169E 2007 Murano TROUBLE DIAGNOSIS Revision: 2006 July ATC-44 TJWB0170E 2007 Murano TROUBLE DIAGNOSIS Auto Amp. Terminals and Reference Value Measure voltage between each terminal and ground by referring terminals and reference value for unified meter and A/C amp. NJS000AV A B C PIN CONNECTOR TERMINAL LAYOUT D RJIA1758E E F G TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP. RJIA1759E Terminal Wire No. color Item Ignition switch Condition Voltage (V) 1 L CAN-H -- -- -- 11 Y CAN-L -- -- -- 21 Y/R Power supply from BATT OFF -- Battery voltage 22 G Power supply from IGN ON -- Battery voltage 29 B Ground (Power) ON -- Approx. 0 30 B Ground ON -- Approx. 0 35 P/B Power supply from ACC ACC -- Battery voltage 39 B/R Ambient sensor -- -- -- 40 LG In-vehicle sensor -- -- -- 41 R/Y Intake sensor -- -- -- A/C switch: ON (Blower motor operates.) Approx. 0 H I ATC K L M 42 GR Compressor ON signal ON OFF switch: ON (A/C system: OFF) SJIA1423J 43 L/B A/C LAN signal Revision: 2006 July ON -- ATC-45 SJIA1453J 2007 Murano TROUBLE DIAGNOSIS Terminal No. 46 49 50 Wire color W/L B/Y O Item Power supply from IGN2 Sensor ground Sunload sensor Ignition switch ON ON -- Condition -- -- -- Voltage (V) Battery voltage Approx. 0 -- 53 L/Y Blower motor control signal 54 L/W Power supply for each door motor 57 SB Blower motor ON signal ON Blower speed: 1st speed (manual) ON -- A/C switch: ON (Blower motor operates.) Battery voltage Approx. 0 SJIA1454J ON OFF switch: ON (A/C system: OFF) SJIA1474J Revision: 2006 July ATC-46 2007 Murano TROUBLE DIAGNOSIS Self-diagnosis Function DESCRIPTION NJS000AW A The self-diagnosis system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli- cable sections (items) for details. Shifting from normal control to the self-diagnosis system is accomplished by starting the engine (turning the ignition switch ON) and pressing OFF switch for at least 5 seconds. The OFF B switch must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system will be canceled by either pressing AUTO switch or turning the ignition switch OFF. Shifting from one step is accomplished by means of turning temperature control dial (driver side), as required. Shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of turning (fan) control dial C clockwise. D E F G H I ATC K L M Revision: 2006 July ATC-47 SJIA1154E 2007 Murano TROUBLE DIAGNOSIS FUNCTION CONFIRMATION PROCEDURE 1. SET IN SELF-DIAGNOSIS MODE 1. Turn ignition switch ON. 2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned ON.), press OFF switch for at least 5 seconds. NOTE: q If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a result, the system may generate an error even when operation is normal. To avoid this, start engine before performing this diagnosis. q Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis function. >> GO TO 2. 2. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT Does code No. 20 appear on the display? YES >> GO TO 3. NO >> GO TO 13. 3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3 Turn temperature control dial (driver side) clockwise. Advance to self-diagnosis STEP-3? YES >> GO TO 4. NO >> Replace A/C and AV switch. (Temperature control dial is malfunctioning.) 4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2 Turn temperature control dial (driver side) counterclockwise. Return to self-diagnosis STEP-2? YES >> GO TO 5. NO >> Replace A/C and AV switch. (Temperature control dial is malfunctioning.) 5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED Turn temperature control dial (driver side) clockwise. Does code No. 30 appear on the display? YES >> GO TO 6. NO >> GO TO 14. SJIA1778E Revision: 2006 July ATC-48 SJIA1779E 2007 Murano TROUBLE DIAGNOSIS 6. STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED A 1. Turn temperature control dial (driver side) clockwise. 2. Press (DEF) switch. Code No. of each actuator test is indi- cated on the display. B >> GO TO 7. C 7. CHECK ACTUATORS Refer to the following chart and confirm discharge air flow, air temperature, blower motor duty ratio and compressor operation. D SJIA1780E E F G H Code No. Mode door position Intake door position Air mix door position Blower motor duty ratio Compressor 41 VENT REC FULL COLD 37% ON 42 B/L 1 REC FULL COLD 91% ON 43 B/L 2 20%FRE FULL HOT 65% OFF 44 FOOT*1 FRE FULL HOT 65% OFF 45 D/F FRE FULL HOT 65% ON RJIA3995E 46 DEF FRE FULL HOT 91% ON I ATC K Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper L operation. *1: FOOT position during automatic control. Refer to ATC-54, "AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER" . M OK or NG OK >> GO TO 8. NG >> q Air outlet does not change. Go to Mode Door Motor Circuit. Refer to ATC-63, "Mode Door Motor Circuit" . q Intake door does not change. Go to Intake Door Motor Circuit. Refer to ATC-69, "Intake Door Motor Circuit" . q Discharge air temperature does not change. Go to Air Mix Door Motor Circuit. Refer to ATC-66, "Air Mix Door Motor Circuit" . q Blower motor operation is malfunctioning. Go to Blower Motor Circuit. Refer to ATC-72, "Blower Motor Circuit" . q Magnet clutch does not engage. Go to Magnet Clutch Circuit. Refer to ATC-77, "Magnet Clutch Circuit" . Revision: 2006 July ATC-49 2007 Murano TROUBLE DIAGNOSIS 8. STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED 1. Turn temperature control dial (driver side) clockwise. 2. Code No. 51 appears on the display. >> GO TO 9. 9. CHECK AMBIENT SENSOR Press (DEF) switch one time. Temperature detected by ambient sensor is indicated on the display. NOTE: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. OK or NG OK >> GO TO 10. NG >> Go to Ambient Sensor Circuit. Refer to ATC-95, "Ambi- ent Sensor Circuit" . 10. CHECK IN-VEHICLE SENSOR Press (DEF) switch for the second time. Temperature detected by in-vehicle sensor is indicated on the display. NOTE: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. OK or NG OK >> GO TO 11. NG >> Go to In-vehicle Sensor Circuit. Refer to ATC-98, "In- vehicle Sensor Circuit" . 11. CHECK INTAKE SENSOR Press (DEF) switch for the third time. Temperature detected by intake sensor is indicated on the display. NOTE: If the temperature indicated on the display greatly differs from the actual temperature, check sensor circuit first, and then check sensor. OK or NG OK >> GO TO 12. NG >> Go to Intake Sensor Circuit. Refer to ATC-104, "Intake Sensor Circuit" . PJIA0151E PJIA0152E PJIA0153E Revision: 2006 July ATC-50 2007 Murano TROUBLE DIAGNOSIS 12. CHECK CAN COMMUNICATION ERROR 1. Press (REC) switch. 2. CAN communication error between unified meter and A/C amp. and display control unit is displayed. (If pulual errors occur, the display of each error will indicates 1 second each.) OK or NG OK >> 1. Turn ignition switch OFF or AUTO switch ON. 2. INSPECTION END NG >> Go to CAN communication. Refer to DI-33, "DTC [U1000] CAN Communication Circuit" . q Unified meter and A/C amp. - Display control unit 13. CHECK MALFUNCTIONING SENSOR AND DOOR MOTOR A B C D SJIA1155E E Refer to the following chart for malfunctioning code No. (If two or more sensors and door motors malfunction, corresponding code Nos. indicates 1 second each.) *1: Perform self-diagnosis STEP-2 under sunshine. F When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code No. 25 will indicate despite that sunload sensor is functioning properly. G Code No. Malfunctioning sensor and door motor (Including circuits) Reference page 21 / -21 Ambient sensor *2 22 / -22 In-vehicle sensor *3 H 24 / -24 Intake sensor *4 25 / -25 Sunload sensor *1 *5 I 26 / -26 Air mix door motor PBR (Driver side) *6 27 / -27 Air mix door motor PBR (Passenger side) *2: ATC-95, "DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR" . ATC *3: ATC-99, "DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR" . *4: ATC-104, "DIAGNOSIS PROCEDURE FOR INTAKE SENSOR" . *5: ATC-101, "DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR" . K *6: ATC-68, "DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR" . L M >> INSPECTION END SJIA1781E Revision: 2006 July ATC-51 2007 Murano TROUBLE DIAGNOSIS 14. CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH Mode and/or intake door motor PBR(s) is/are malfunctioning. Code No.*1 *2 31 32 33 34 35 36 37 38 39 Mode or intake door position VENT B/L 1 B/L 2 FOOT*3 Mode door motor D/F DEF FRE 20% FRE Intake door motor REC Reference page *4 *5 (If two or more mode or intake door motors malfunction, corresponding code Nos. indicates 1 second each.) *1: If mode door motor harness connector is disconnected, the following display pattern will appear. 313233343536Return to 31 *2: If intake door motor harness connector is disconnected, the following display pattern will appear. 373839Return to 37 *3: FOOT position during automatic control. Refer to ATC-54, "AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER" . *4: ATC-65, "DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR" . *5: ATC-71, "DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR" . >> INSPECTION END SJIA1782E Revision: 2006 July ATC-52 2007 Murano TROUBLE DIAGNOSIS AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER The trimmer compensates for differences in range of ±3°C (±6°F) between temperature setting (displayed dig- A itally) and temperature felt by customer. Operating procedures for this trimmer are as follows: 1. Begin self-diagnosis STEP-5 mode. Refer to ATC-47, "Self-diagnosis Function" . B 2. Turn fan control dial clockwise to set system in auxiliary mode. 3. Display shows "61" in auxiliary mechanism. It takes approximately 3 seconds. 4. Turn temperature control dial (driver side) as desired. Temperature will change at a rate of 0.5°C (1.0°F) C each time a dial is turned. CAUTION: A decimal point is not indicated on the display. D E F G H I ATC K L M SJIA1156E When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Temperature set becomes that of initial condition, i.e. 0°C (0°F). Revision: 2006 July ATC-53 2007 Murano TROUBLE DIAGNOSIS AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER Wind distribution ratio in FOOT mode can be set. Operating procedures for this trimmer are as follows: 1. Begin self-diagnosis STEP-5 mode. Refer to ATC-47, "Self-diagnosis Function" . 2. Turn fan control dial clockwise to set system in auxiliary mode. 3. Display shows "61" in auxiliary mechanism. It takes approximately 3 seconds. 4. Press the mode switch as desired. PJIA0124E When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Wind distribution ratio set becomes that of initial condition. AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION When ignition switch is turned from OFF to ON, inlet port memory function at manual mode can be set. Operating procedures for this trimmer are as follows: 1. Begin self-diagnosis STEP-5 mode. Refer to ATC-47, "Self-diagnosis Function" . 2. Turn fan control dial clockwise to set system in auxiliary mode. 3. Display shows "61" in auxiliary mechanism. It takes approximately 3 seconds. 4. Press the recirculation (REC) and fresh (FRE) switch as desired. Switch LED status of REC/FRE switch Setting status Setting changeover method REC ON OFF Manual REC status is memorized. (Initial setting) AUTO control REC SW: ON FRE ON OFF Manual FRE status is memorized. AUTO control (Initial setting) FRE SW: ON When battery cable is disconnected or battery voltage is below 10 V, memory function is canceled. Memory function set becomes that of initial condition. Revision: 2006 July ATC-54 2007 Murano TROUBLE DIAGNOSIS Operational Check The purpose of the operational check is to check if the individual system operates properly. NJS000AX A Conditions : Engine running at normal operating temperature CHECKING MEMORY FUNCTION B 1. Turn temperature control dial clockwise until 32°C (90°F) is displayed. 2. Press OFF switch. 3. Turn ignition switch OFF. C 4. Turn ignition switch ON. 5. Press the AUTO switch. D 6. Confirm that the set temperature remains at previous temperature. 7. Press OFF switch. If NG, go to trouble diagnosis procedure for ATC-94, "Memory Function" . E If OK, continue the check. CHECKING BLOWER 1. Turn fan control dial clockwise. Blower should operate on low speed. The fan symbol should have one F blade lit. 2. Turn fan control dial clockwise again, and continue checking blower speed and fan symbol until all speeds are checked. G 3. Leave blower on max. speed. If NG, go to trouble diagnosis procedure for ATC-72, "Blower Motor Circuit" . If OK, continue the check. H CHECKING DISCHARGE AIR 1. Press MODE switch and DEF switch. I 2. Each position indicator should change shape. 3. Confirm that discharge air comes out according to the air distri- bution table. Refer to ATC-32, "Discharge Air Flow" . If NG, go to trouble diagnosis procedure for ATC-63, "Mode Door ATC Motor Circuit" . If OK, continue the check. NOTE: K Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at FRESH when the DEF or D/F is selected. L RJIA3995E CHECKING INTAKE AIR M 1. Press recirculation (REC) switch. Recirculation indicator should illuminate. 2. Press fresh (FRE) switch. Fresh indicator should illuminate. 3. Listen for intake door position change. (Slight change of blower sound can be heard.) If NG, go to trouble diagnosis procedure for ATC-69, "Intake Door Motor Circuit" . If OK, continue the check. NOTE: Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at FRESH when the DEF or D/F is selected. CHECKING TEMPERATURE DECREASE 1. Turn temperature control dial (driver side) counterclockwise until 18°C (60°F) is displayed. 2. Check for cold air at discharge air outlets. If NG, go to trouble diagnosis procedure for ATC-83, "Insufficient Cooling" . If OK, continue the check. Revision: 2006 July ATC-55 2007 Murano TROUBLE DIAGNOSIS CHECKING TEMPERATURE INCREASE 1. Turn temperature control dial (driver side) clockwise until 32°C (90°F) is displayed. 2. Check for hot air at discharge air outlets. If NG, go to trouble diagnosis procedure for ATC-91, "Insufficient Heating" . If OK, continue the check. CHECK A/C SWITCH Press AUTO switch and A/C switch. Then A/C switch indicator is turned ON. q Confirm that the compressor clutch engages (sound or visual inspection). If NG, go to trouble diagnosis procedure for ATC-77, "Magnet Clutch Circuit" . If OK, continue the check. CHECKING AUTO MODE Press AUTO switch and A/C switch. Then display is indicated AUTO. q Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower speed will depend on ambient, in-vehicle, and set temperatures.) If NG, go to trouble diagnosis procedure for ATC-57, "Power Supply and Ground Circuit for Auto Amp." , then if necessary, trouble diagnosis procedure for ATC-77, "Magnet Clutch Circuit" . If all operational checks are OK (symptom cannot be duplicated), go to Malfunction Simulation Tests in GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to ATC-36, "SYMPTOM TABLE" and perform applicable trouble diagnosis procedures. Revision: 2006 July ATC-56 2007 Murano TROUBLE DIAGNOSIS Power Supply and Ground Circuit for Auto Amp. SYMPTOM: A/C system does not come on. INSPECTION FLOW NJS000AY A B C D E F G H I *1 ATC-58, "DIAGNOSIS PROCEDURE FOR A/C SYSTEM" *4 AV-39, "A/C and AV Switch SelfDiagnosis Function" *2 ATC-55, "Operational Check" COMPONENT DESCRIPTION Unified Meter and A/C Amp. (Automatic Amplifier) The unified meter and A/C amp. has a built-in microcomputer which processes information sent from various sensors needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower motor and compressor are then controlled. When the various switches and temperature control dials are operated, data is input to the unified meter and A/C amp. from the display control unit using CAN communication. Self-diagnosis functions are also built into unified meter and A/C amp. to provide quick check of malfunctions in the auto air conditioner system. SJIA1158E *3 AV-120, "Example of Symptoms Possible No Malfunction" ATC K L M RJIA1758E Revision: 2006 July ATC-57 2007 Murano TROUBLE DIAGNOSIS Potentio Temperature Control (PTC) The PTC is built into the A/C and AV switch. It can be set at an interval of 0.5°C (1.0°F) in the 18°C (60°F) to 32°C (90°F) temperature range by turning temperature control dial. The set temperature is displayed. DIAGNOSIS PROCEDURE FOR A/C SYSTEM SYMPTOM: A/C system does not come on. SJIA1188E SJIA0301E 1. CHECK POWER SUPPLY CIRCUIT FOR UNIFIED METER AND A/C AMP. 1. Disconnect unified meter and A/C amp. connector. 2. Check voltage between unified meter and A/C amp. harness connector M50 terminals 21, 22 and 35, unified meter and A/C amp. harness connector M51 terminal 46 and ground. Terminals Ignition switch position (+) Unified meter and A/C amp. connector Terminal No. (-) M50 21 OFF ACC ON Battery voltage Battery voltage Battery voltage RJIA1984E M50 22 Approx. 0 V Approx. 0 V Battery voltage Ground M50 35 Approx. 0 V Battery voltage Battery voltage M51 46 Approx. 0 V Approx. 0 V Battery voltage OK or NG OK >> GO TO 2. NG >> Check 10A and 15A fuses [Nos. 6, 10, 11, 12 and 19, located in the fuse block (J/B)]. Refer to PG- 70, "FUSE BLOCK - JUNCTION BOX (J/B)" . q If fuses are OK, check harness for open circuit. Repair or replace if necessary. q If fuses are NG, check harness for short circuit and replace fuse. Revision: 2006 July ATC-58 2007 Murano TROUBLE DIAGNOSIS 2. CHECK GROUND CIRCUIT FOR UNIFIED METER AND A/C AMP. A 1. Turn ignition switch OFF. 2. Check continuity between unified meter and A/C amp. harness connector M50 terminal 29, 30 and ground. B 29, 30 Ground : Continuity should exist. OK or NG C OK >> Replace unified meter and A/C amp. NG >> Repair harness or connector. D RJIA1985E LAN System Circuit NJS000AZ E SYMPTOM: Mode door motor, intake door motor and/or air mix door motor(s) does not operate normally. F G H I ATC DIAGNOSIS PROCEDURE FOR LAN CIRCUIT 1. CHECK POWER SUPPLY FOR UNIFIED METER AND A/C AMP. 1. Turn ignition switch ON. 2. Check voltage between unified meter and A/C amp. harness connector M51 terminal 54 and ground. 54 Ground : Battery voltage OK or NG OK >> GO TO 2. NG >> Replace unified meter and A/C amp. K RJIA1775E L M RJIA1986E Revision: 2006 July ATC-59 2007 Murano TROUBLE DIAGNOSIS 2. CHECK SIGNAL FOR UNIFIED METER AND A/C AMP. Confirm A/C LAN signal between unified meter and A/C amp. harness connector M51 terminal 43 and ground using an oscilloscope. Terminals (+) Unified meter (-) and A/C amp. Terminal No. connector Voltage M51 43 Ground SJIA1453J OK or NG OK >> GO TO 3. NG >> Replace unified meter and A/C amp. 3. CHECK POWER SUPPLY FOR EACH DOOR MOTOR Check voltage between each door motor harness connector terminal 1 and ground. 1 Ground : Battery voltage OK or NG OK >> GO TO 4. NG >> Repair harness or connector. 4. CHECK SIGNAL FOR EACH DOOR MOTOR Confirm A/C LAN signal between each door motor harness connector terminal 3 and ground using an oscilloscope. Terminals Door motor (+) Connector Terminal No. (-) Mode M252 3 Air mix (Driver side) Air mix (Passenger side) M253 M254 3 Ground 3 Intake M255 3 OK or NG OK >> GO TO 5. NG >> Repair harness or connector. Voltage SJIA1453J Revision: 2006 July ATC-60 RJIA1987E RJIA1988E RJIA1989E 2007 Murano TROUBLE DIAGNOSIS 5. CHECK EACH DOOR MOTOR GROUND CIRCUIT A 1. Turn ignition switch OFF. 2. Disconnect each door motor connector. 3. Check continuity between each door motor harness connector B terminal 2 and ground. 2 Ground : Continuity should exist. C OK or NG OK >> GO TO 6. NG >> Repair harness or connector. D 6. CHECK MOTOR OPERATION RJIA1990E E 1. Reconnect each door motor connector. 2. Turn ignition switch ON. F 3. Confirm operation of each door motor. OK or NG OK >> (Return to operate normally.) G q Poor contact in motor connector. NG >> (Does not operate normally.) q GO TO 7. H 7. CHECK AIR MIX DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION 1. Turn ignition switch OFF. I 2. Disconnect mode door motor, air mix door motor (driver side, passenger side), and intake door motor con- nectors. ATC 3. Reconnect air mix door motor (driver side, passenger side) and intake door motor connectors. 4. Turn ignition switch ON. 5. Confirm operation of air mix door motor (driver side, passenger side) and intake door motor. K OK or NG OK >> [Air mix (driver side, passenger side) and intake door motors operate normally.] q Replace mode door motor. L NG >> [Air mix (driver side, passenger side) and intake door motors does not operate normally.] q GO TO 8. 8. CHECK MODE DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION M 1. Turn ignition switch OFF. 2. Disconnect air mix door motor (driver side, passenger side) connectors. 3. Reconnect mode door motor connector. 4. Turn ignition switch ON. 5. Confirm operation of mode door motor and intake door motor. OK or NG OK >> (Mode and intake door motors operate normally.) q GO TO 10. NG >> (Mode and intake door motors does not operate normally.) q GO TO 9. Revision: 2006 July ATC-61 2007 Murano TROUBLE DIAGNOSIS 9. CHECK MODE DOOR MOTOR AND AIR MIX DOOR MOTOR OPERATION 1. Turn ignition switch OFF. 2. Disconnect intake door motor connector. 3. Reconnect air mix door motor (driver side, passenger side) connectors. 4. Turn ignition switch ON. 5. Confirm operation of mode door motor and air mix door motor (driver side, passenger side). OK or NG OK >> [Mode and air mix door motor (driver side, passenger side) operate normally.] q Replace intake door motor. NG >> [Mode and air mix door motor (driver side, passenger side) does not operate normally.] q Replace display and A/C auto amp. 10. CHECK AIR MIX DOOR MOTOR OPERATION 1. Turn ignition switch OFF. 2. Disconnect air mix door motor (driver side) connector. 3. Turn ignition switch ON. 4. Confirm operation of air mix door motor (passenger side). OK or NG OK >> [Air mix door motor (passenger side) operates normally.] q Replace air mix door motor (driver side). NG >> [Air mix door motor (passenger side) does not operate normally.] q Replace air mix door motor (passenger side). Revision: 2006 July ATC-62 2007 Murano TROUBLE DIAGNOSIS Mode Door Motor Circuit SYMPTOM q Air outlet does not change. q Mode door motor does not operate normally. INSPECTION FLOW NJS000B0 A B C D E F G H I ATC K L M *1 ATC-32, "Discharge Air Flow" *2 ATC-55, "Operational Check" *4 ATC-48, "FUNCTION CONFIRMA- *5 ATC-95, "Ambient Sensor Circuit" TION PROCEDURE", see No. 4 to 6. *7 ATC-101, "Sunload Sensor Circuit" *8 ATC-68, "Air Mix Door Motor PBR Circuit" *10 ATC-59, "DIAGNOSIS PROCEDURE *11 ATC-65, "Mode Door Motor" FOR LAN CIRCUIT" SJIA1159E *3 ATC-104, "Intake Sensor Circuit" *6 ATC-98, "In-vehicle Sensor Circuit" *9 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. *12 ATC-36, "SYMPTOM TABLE" Revision: 2006 July ATC-63 2007 Murano TROUBLE DIAGNOSIS SYSTEM DESCRIPTION Component Parts Mode door control system components are: q Unified meter and A/C amp. q Mode door motor (LCU) q A/C LAN system (PBR built-in mode door motor, intake door motor and air mix door motor) q In-vehicle sensor q Ambient sensor q Sunload sensor q Intake sensor System Operation The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp. sends air mix door, mode door and intake door opening angle data to the air mix door motor LCUs, mode door motor LCU and intake door motor LCU. The air mix door motors, mode door motor and intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the unified meter and A/C amp. and each of the motor position sensors are compared by the LCUs in each door motor with the existing decision and opening angles. Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data are returned to the unified meter and A/C amp. Mode Door Control Specification Revision: 2006 July ATC-64 RJIA1777E RJIA1778E 2007 Murano TROUBLE DIAGNOSIS COMPONENT DESCRIPTION Mode Door Motor A The mode door motor is attached to the heater & cooling unit assem- bly. It rotates so that air is discharged from the outlet set by the uni- fied meter and A/C amp. Motor rotation is conveyed to a link which B activates the mode door. C D RJIA3961E DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR E SYMPTOM: Mode door motor does not operate normally. Perform diagnosis procedure. Refer to ATC-59, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" . F G H I ATC K L M Revision: 2006 July ATC-65 2007 Murano TROUBLE DIAGNOSIS Air Mix Door Motor Circuit SYMPTOM q Discharge air temperature does not change. q Air mix door motor does not operate normally. INSPECTION FLOW NJS000B1 *1 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 4 to 6. *4 ATC-101, "Sunload Sensor Circuit" *7 ATC-59, "LAN System Circuit" *10 ATC-36, "SYMPTOM TABLE" *2 ATC-95, "Ambient Sensor Circuit" *3 *5 ATC-68, "Air Mix Door Motor PBR Cir- *6 cuit" *8 ATC-68, "Air Mix Door Motor" *9 *11 ATC-104, "Intake Sensor Circuit" SJIA1229E ATC-98, "In-vehicle Sensor Circuit" ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. ATC-55, "Operational Check" Revision: 2006 July ATC-66 2007 Murano TROUBLE DIAGNOSIS SYSTEM DESCRIPTION Component Parts A Air mix door control system components are: q Unified meter and A/C amp. q Air mix door motor (LCU) B q A/C LAN system (PBR built-in mode door motor, intake door motor and air mix door motor) q In-vehicle sensor C q Ambient sensor q Sunload sensor q Intake sensor D System Operation The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp. sends air mix door, mode door and intake door opening angle data to the air mix door motor LCUs, mode door E motor LCU and intake door motor LCU. The air mix door motors, mode door motor and intake door motor read their respective signals according to the address signal. Opening angle indication signals received from the unified meter and A/C amp. and each of F the motor position sensors are compared by the LCUs in each door motor with the existing decision and open- ing angles. Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection data are returned to the unified meter and A/C amp. G H I ATC K Air Mix Door Control Specification L RJIA1781E M Revision: 2006 July ATC-67 RJIA1782E 2007 Murano TROUBLE DIAGNOSIS COMPONENT DESCRIPTION Air Mix Door Motor The air mix door motors are attached to the heater & cooling unit assembly. It rotates so that the air mix door is opened or closed to a position set by the unified meter and A/C amp. Motor rotation is then conveyed through a shaft and the air mix door position feedback is then sent to the unified meter and A/C amp. by PBR built-in air mix door motor. RJIA3963E DIAGNOSIS PROCEDURE FOR AIR MIX DOOR SYMPTOM: Discharge air temperature does not change. Perform diagnosis procedure. Refer to ATC-59, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" . Air Mix Door Motor PBR Circuit SYMPTOM q Discharge air temperature does not change. q PBR circuit is open or shorted. DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR Perform diagnosis procedure. Refer to ATC-59, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" . RJIA3964E NJS000B2 Revision: 2006 July ATC-68 2007 Murano TROUBLE DIAGNOSIS Intake Door Motor Circuit SYMPTOM q Intake door does not change. q Intake door motor does not operate normally. INSPECTION FLOW NJS000B3 A B C D E F G H I ATC K L M *1 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 4 to 6. *4 ATC-101, "Sunload Sensor Circuit" *7 ATC-59, "LAN System Circuit" *10 ATC-36, "SYMPTOM TABLE" *2 ATC-95, "Ambient Sensor Circuit" *5 ATC-68, "Air Mix Door Motor PBR Circuit" *8 ATC-71, "Intake Door Motor" *11 ATC-104, "Intake Sensor Circuit" SJIA1160E *3 ATC-98, "In-vehicle Sensor Circuit" *6 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. *9 ATC-55, "Operational Check" Revision: 2006 July ATC-69 2007 Murano TROUBLE DIAGNOSIS SYSTEM DESCRIPTION Component Parts Intake door control system components are: q Unified meter and A/C amp. q Intake door motor (LCU) q A/C LAN system (PBR built-in mode door motor, intake door motor and air mix door motor) q In-vehicle sensor q Ambient sensor q Sunload sensor q Intake sensor System Operation The intake door control determines intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When shifting mode position D/F, when the DEF or OFF switches are pressed, or when A/C switch is OFF, the unified meter and A/C amp. sets the intake door at the FRE position. Intake Door Control Specification Revision: 2006 July ATC-70 PJIA0122E RJIA1787E 2007 Murano TROUBLE DIAGNOSIS COMPONENT DESCRIPTION Intake Door Motor A The intake door motor is attached to the blower unit. It rotates so that air is drawn from inlets set by the unified meter and A/C amp. Motor rotation is conveyed to a lever which activates the intake door. B C D RJIA1788E DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR E SYMPTOM: Intake door motor does not operate normally. Perform diagnosis procedure. Refer to ATC-59, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" . F G H I ATC K L M Revision: 2006 July ATC-71 2007 Murano TROUBLE DIAGNOSIS Blower Motor Circuit SYMPTOM: Blower motor operation is malfunctioning. INSPECTION FLOW NJS000B4 *1 ATC-55, "Operational Check" *4 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 6. *7 ATC-36, "SYMPTOM TABLE" *10 ATC-101, "Sunload Sensor Circuit" *2 ATC-104, "Intake Sensor Circuit" *5 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. *8 ATC-95, "Ambient Sensor Circuit" *11 EC-207, "DTC P0117, P0118 ECT SENSOR" SJIA1161E *3 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 4. *6 ATC-74, "DIAGNOSIS PROCEDURE FOR BLOWER MOTOR" *9 ATC-98, "In-vehicle Sensor Circuit" Revision: 2006 July ATC-72 2007 Murano TROUBLE DIAGNOSIS SYSTEM DESCRIPTION Component Parts A Fan speed control system components are: q Unified meter and A/C amp. q A/C LAN system (PBR built-in mode door motor, intake door motor and air mix door motor) B q In-vehicle sensor q Ambient sensor C q Sunload sensor q Intake sensor System Operation D E F G H I SJIA0526E ATC Automatic Mode In the automatic mode, the blower motor speed is calculated by the unified meter and A/C amp. based on the input from the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor. K When the air flow is increased, the duty ratio of the blower fan motor's drive signal is changed at 8%/sec. to prevent a sudden increase in air flow. In addition to manual air flow control and the usual automatic air flow control, starting air flow control, low L water temperature starting control and high passenger compartment temperature starting control are avail- able. Starting Fan Speed Control M Start up from COLD SOAK Condition (Automatic mode) In a cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower will not operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the ambient and engine coolant temperature. In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above 56°C (133°F), and then the blower speed will increase to the objective speed. Start up from usual or HOT SOAK Condition (Automatic mode) The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed will gradu- ally rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective blower speed). Revision: 2006 July ATC-73 2007 Murano TROUBLE DIAGNOSIS Blower Speed Compensation Sunload When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low speed. The low speed will vary depending on the sunload. During conditions of low or no sunload, the blower speed is at duty ratio 25%. During high sunload conditions, the unified meter and A/C amp. raise the blower speed (duty ratio 49%). Fan Speed Control Specification COMPONENT DESCRIPTION Brush-less Motor The blower motor utilizes a brush-less motor with a rotating magnet. Quietness is improved over previous motors where the brush was the point of contact and the coil rotated. DIAGNOSIS PROCEDURE FOR BLOWER MOTOR SYMPTOM: Blower motor operation is malfunctioning. RJIA1996E ZHA152H SJIA0266E Revision: 2006 July ATC-74 2007 Murano TROUBLE DIAGNOSIS 1. CHECK POWER SUPPLY FOR BLOWER MOTOR A 1. Disconnect blower motor connector. 2. Turn ignition switch ON. 3. Check voltage between blower motor harness connector M70 B terminal 1 and ground. 1 Ground : Battery voltage OK or NG OK >> GO TO 2. NG >> Check power supply circuit and 15A fuses [Nos. 10 and 11, located in the fuse block (J/B)]. Refer to PG-70, "FUSE BLOCK - JUNCTION BOX (J/B)" . q If fuse are OK, check harness for open circuit. Repair or replace if necessary. q If fuse are NG, check harness for short circuit and replace fuse. 2. CHECK BLOWER MOTOR GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Check continuity between blower motor harness connector M70 terminal 3 and ground. C D RJIA1997E E F G 3 Ground : Continuity should exist. OK or NG H OK >> GO TO 3. NG >> Repair harness or connector. I RJIA1998E 3. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND UNIFIED METER AND A/C AMP. ATC 1. Disconnect unified meter and A/C amp. connector. 2. Check continuity between blower motor harness connector M70 K terminal 2 and unified meter and A/C amp. harness connector M51 terminal 53. 2 53 : Continuity should exist. L OK or NG OK >> GO TO 4. NG >> Repair harness or connector. M RJIA1999E Revision: 2006 July ATC-75 2007 Murano TROUBLE DIAGNOSIS 4. CHECK UNIFIED METER AND A/C AMP. OUTPUT SIGNAL 1. Reconnect blower motor connector and unified meter and A/C amp. connector. 2. Turn ignition switch ON. 3. Change the fan speed from Lo to Hi, and check the duty ratios between blower motor harness connector M70 terminal 2 and ground by using an oscilloscope. Normal terminal 2 drive signal duty ratios are shown in the table below. RJIA2000E OK or NG OK >> Replace blower motor after confirming the fan air flow does not change. NG >> Replace unified meter and A/C amp. COMPONENT INSPECTION Blower Motor Confirm smooth rotation of the blower motor. q Ensure that there are no foreign particles inside the blower unit. RJIA1792E RJIA1793E Revision: 2006 July ATC-76 2007 Murano TROUBLE DIAGNOSIS Magnet Clutch Circuit SYMPTOM: Magnet clutch does not engage. INSPECTION FLOW NJS000B5 A B C D E F G H I ATC K L M SJIA1162E *1 ATC-104, "Intake Sensor Circuit" *2 ATC-95, "Ambient Sensor Circuit" *3 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. *4 ATC-78, "DIAGNOSIS PROCEDURE *5 ATC-88, "TROUBLE DIAGNOSIS FOR MAGNET CLUTCH" FOR UNUSUAL PRESSURE" *6 ATC-55, "Operational Check" *7 ATC-48, "FUNCTION CONFIRMA- *8 ATC-36, "SYMPTOM TABLE" TION PROCEDURE", see No. 4 to 6. Revision: 2006 July ATC-77 2007 Murano TROUBLE DIAGNOSIS SYSTEM DESCRIPTION Unified meter and A/C amp. controls compressor operation by ambient temperature and signal from ECM. Low Temperature Protection Control Unified meter and A/C amp. will turn the compressor ON or OFF as determined by a signal detected by intake sensor. When intake air temperature is higher than 4°C (39°F), the compressor turns ON. The compressor turns OFF when intake air temperature is lower than 2.5°C (37°F). DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH SYMPTOM: Magnet clutch does not engage when A/C switch is ON. RHA094GD 1. CHECK INTAKE SENSOR CIRCUIT SJIA1232E Check intake sensor. Refer to ATC-48, "FUNCTION CONFIRMATION PROCEDURE" , see No. 11. OK or NG OK >> GO TO 2. NG >> Malfunctioning intake sensor: Refer to ATC-104, "Intake Sensor Circuit" . 2. PERFORM AUTO ACTIVE TEST Refer to PG-21, "Auto Active Test" . Does the magnet clutch operate? YES >> q WITH CONSULT-II: GO TO 5. q WITHOUT CONSULT-II: GO TO 6. NO >> Check 10A fuse (No. 79, located in IPDM E/R). Refer to PG-25, "IPDM E/R Terminal Arrange- ment" , and GO TO 3. Revision: 2006 July ATC-78 2007 Murano TROUBLE DIAGNOSIS 3. CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR 1. Turn ignition switch OFF. 2. Disconnect IPDM E/R connector and compressor connector. 3. Check continuity between IPDM E/R harness connector E8 terminal 33 and compressor harness connector F28 terminal 1. 33 1 : Continuity should exist. OK or NG OK >> GO TO 4. NG >> Repair harness or connector. 4. CHECK MAGNET CLUTCH CIRCUIT Check for operation sound when applying battery voltage direct current to terminal. OK or NG OK >> 1. Replace IPDM E/R. 2. Go to self-diagnosis procedure ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-4. Confirm that magnet clutch operation normal. NG >> 1. Replace compressor. 2. Go to self-diagnosis procedure ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-4. Confirm that magnet clutch operation normal. 5. CHECK BCM INPUT (COMPRESSOR ON) SIGNAL Check compressor ON/OFF signal. Refer to ATC-35, "CONSULT-II Function (BCM)" . A/C SW ON : AIR COND SW ON A/C SW OFF : AIR COND SW OFF OK or NG OK >> GO TO 8. NG >> GO TO 6. 6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect BCM connector and unified meter and A/C amp. connector. 3. Check continuity between BCM harness connector M34 terminal 27 and unified meter and A/C amp. harness connector M51 terminal 42. 27 42 : Continuity should exist. OK or NG OK >> GO TO 7. NG >> Repair harness or connector. A B C D RJIA2004E E F G H RJIA2005E I ATC K L M RJIA1111E RJIA2006E Revision: 2006 July ATC-79 2007 Murano TROUBLE DIAGNOSIS 7. CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (COMPRESSOR ON SIGNAL) 1. Reconnect BCM connector and unified meter and A/C amp. connector. 2. Turn ignition switch ON. 3. Check voltage between unified meter and A/C amp. harness connector M51 terminal 42 and ground. Terminals (+) Unified meter and A/C amp. connector Terminal No. M51 42 (-) Ground Condition A/C switch: ON (Blower motor operates.) OFF switch: ON (A/C system: OFF) Voltage Approx. 0 V Approx. 5 V RJIA2007E OK or NG OK >> GO TO 8. NG-1 >> If the voltage is approx. 5 V when A/C switch is ON: Replace unified meter and A/C amp. NG-2 >> If the voltage is approx. 0 V when A/C switch is OFF: Replace BCM. 8. CHECK REFRIGERANT PRESSURE SENSOR WITH CONSULT-II 1. Start the engine. 2. Check voltage of refrigerant pressure sensor. Refer to EC-126, "CONSULT-II Reference Value in Data Monitor" . WITHOUT CONSULT-II 1. Start the engine. 2. Check voltage between ECM harness connector F101 terminal 70 and ground. Terminals (+) ECM connector Terminal No. (-) Condition Voltage F101 A/C switch: ON 70 Ground (Blower motor Approx. 1.0 - 4.0 V operates.) OK or NG OK >> q WITH CONSULT-II: GO TO 9. q WITHOUT CONSULT-II: GO TO 10. NG >> Refer to EC-648, "REFRIGERANT PRESSURE SENSOR" . PBIB1188E Revision: 2006 July ATC-80 2007 Murano TROUBLE DIAGNOSIS 9. CHECK BCM INPUT (FAN ON) SIGNAL A Check FAN ON/OFF signal. Refer to ATC-35, "CONSULT-II Function (BCM)" . FAN CONTROL DIAL ON : FAN ON SIG ON B FAN CONTROL DIAL OFF : FAN ON SIG OFF OK or NG C OK >> GO TO 12. NG >> GO TO 10. D 10. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND UNIFIED METER AND A/C AMP. RJIA1111E E 1. Turn ignition switch OFF. 2. Disconnect BCM connector and unified meter and A/C amp. connector. 3. Check continuity between BCM harness connector M34 terminal 28 and unified meter and A/C amp. harness connector M51 terminal 57. 28 57 : Continuity should exist. OK or NG OK >> GO TO 11. NG >> Repair harness or connector. 11. CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (FAN ON SIGNAL) F G H RJIA2009E I 1. Reconnect BCM connector and unified meter and A/C amp. connector. ATC 2. Turn ignition switch ON. 3. Check voltage between unified meter and A/C amp. harness connector M51 terminal 57 and ground. K Terminals (+) Unified meter and A/C amp. connector Terminal No. M51 57 Condition Voltage (-) Ground Fan control dial: ON (Blower motor operates.) Approx. 0 V L RJIA2010E M Fan control dial: OFF Approx. 5 V OK or NG OK >> GO TO 12. NG-1 >> If the voltage is approx. 5 V when blower motor is ON: Replace unified meter and A/C amp. NG-2 >> If the voltage is approx. 0 V when blower motor is OFF: Replace BCM. Revision: 2006 July ATC-81 2007 Murano TROUBLE DIAGNOSIS 12. CHECK CAN COMMUNICATION Check CAN communication. Refer to BCS-13, "CAN Communication Inspection Using CONSULT-II (SelfDiagnosis)" . q BCM ECM q ECM IPDM E/R q ECM Unified meter and A/C amp. OK or NG OK >> Replace ECM. NG >> Repair or replace malfunctioning part(s). COMPONENT INSPECTION Refrigerant Pressure Sensor The refrigerant pressure sensor is attached to the condenser. Make sure that the A/C refrigerant pressure and the sensor output voltage are within the specified range as shown in the A/C operating condition figure. Refer to EC-648, "REFRIGERANT PRESSURE SENSOR" . RJIA1795E RJIA2954E Revision: 2006 July ATC-82 2007 Murano Insufficient Cooling SYMPTOM: Insufficient cooling INSPECTION FLOW TROUBLE DIAGNOSIS NJS000B6 A B C D E F G H I ATC K L M Revision: 2006 July ATC-83 SJIA1230E 2007 Murano TROUBLE DIAGNOSIS *1 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 4 to 6. *4 ATC-53, "AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER" *7 ATC-72, "Blower Motor Circuit" *10 ATC-55, "Operational Check" *13 EC-498, "SYSTEM DESCRIPTION" *2 ATC-66, "Air Mix Door Motor Circuit" *5 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 13. *8 ATC-77, "Magnet Clutch Circuit" *11 ATC-6, "CONTAMINATED REFRIGERANT" *3 ATC-87, "Test Reading" *6 ATC-59, "LAN System Circuit" *9 ATC-85, "PERFORMANCE TEST DIAGNOSIS" *12 EM-13, "Checking Drive Belts" Revision: 2006 July ATC-84 2007 Murano TROUBLE DIAGNOSIS PERFORMANCE TEST DIAGNOSIS A B C D E F G H I ATC K L M SJIA1226E *1 ATC-87, "PERFORMANCE CHART" *2 ATC-87, "PERFORMANCE CHART" *3 ATC-88, "TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE" *4 ATC-66, "Air Mix Door Motor Circuit" Revision: 2006 July ATC-85 2007 Murano TROUBLE DIAGNOSIS *1 ATC-135, "Check Disc to Pulley Clearance" *2 ATC-72, "Blower Motor Circuit" SJIA1642E *3 EM-13, "Checking Drive Belts" Revision: 2006 July ATC-86 2007 Murano TROUBLE DIAGNOSIS PERFORMANCE CHART Test Condition Testing must be performed as follows: Vehicle condition Doors Door windows Hood TEMP. Indoors or in the shade (in a well-ventilated place) Closed Open Open Max. COLD Mode switch (Ventilation) set Recirculation (REC) switch (Recirculation) set Fan (blower) speed Max. speed set Engine speed Idle speed Operate the air conditioning system for 10 minutes before taking measurements. Test Reading Recirculating-to-discharge Air Temperature Table Inside air (Recirculating air) at blower assembly inlet Relative humidity % Air temperature °C (°F) 20 (68) 25 (77) 50 - 60 30 (86) 35 (95) 40 (104) 20 (68) 25 (77) 60 - 70 30 (86) 35 (95) 40 (104) Discharge air temperature at center ventilator °C (°F) 5.3 - 6.5 (42 - 44) 9.7 - 11.5 (49 - 53) 13.8 - 16.3 (57 - 61) 18.0 - 21.2 (64 - 70) 22.2 - 25.7 (72 - 78) 6.5 - 7.7 (44 - 46) 11.5 - 13.3 (53 - 56) 16.3 - 18.8 (61 - 66) 21.2 - 24.0 (70 - 75) 25.7 - 29.2 (78 - 85) Ambient Air Temperature-to-operating Pressure Table Ambient air Relative humidity % Air temperature °C (°F) 20 (68) 25 (77) 50 - 70 30 (86) 35 (95) 40 (104) High-pressure (Discharge side) kPa (kg/cm2 , psi) 680 - 840 (6.94 - 8.57, 98.6 - 121.8) 800 - 985 (8.16 - 10.05, 116.0 - 142.8) 940 - 1,150 (9.59 - 11.73, 136.3 - 166.8) 1,160 - 1,410 (11.83 - 14.38, 168.2 - 204.5) 1,325 - 1,620 (13.52 - 16.52, 192.1 - 234.9) Low-pressure (Suction side) kPa (kg/cm2 , psi) 160 - 198 (1.63 - 2.02, 23.2 - 28.7) 198 - 245 (2.02 - 2.50, 28.7 - 35.5) 225 - 278 (2.30 - 2.84, 32.6 - 40.3) 273 - 335 (2.78 - 3.42, 39.6 - 48.6) 325 - 398 (3.32 - 4.06, 47.1 - 57.7) A B C D E F G H I ATC K L M Revision: 2006 July ATC-87 2007 Murano TROUBLE DIAGNOSIS TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE Whenever system's high and/or low side pressure(s) is/are unusual, diagnose using a manifold gauge. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air temperature-to-operating pressure table). Both High- and Low-pressure Sides are Too High Gauge indication Refrigerant cycle Probable cause Corrective action Both high- and low-pressure sides are too high. AC359A The pressure returns to normal soon after water is splashed on condenser. Air suction by cooling fan is insufficient. q Low-pressure pipe is not cold. q When compressor is stopped high-pressure value quickly drops by approximately 196 kPa (2 kg/cm2 , 28 psi). It then decreases gradually thereafter. Engine tends to overheat. q An area of the low-pressure pipe is colder than areas near the evaporator outlet. q Low-pressure pipe is sometimes covered with frost. Excessive refrigerant charge in refrigeration cycle. Insufficient condenser cooling performance. 1. Condenser fins are clogged. 2. Improper fan rotation of cooling fan. Poor heat exchange in condenser (After compressor operation stops, high-pressure decreases too slowly.). Air in refrigeration cycle. Engine cooling systems malfunction. q Excessive liquid refrigerant on low-pressure side. q Excessive refrigerant discharge flow. q Expansion valve is open a little compared with the specification. Improper expansion valve adjustment. Reduce refrigerant until specified pressure is obtained. q Clean condenser. q Check and repair cooling fan as necessary. Evacuate repeatedly and recharge system. Check and repair each engine cooling system. Replace expansion valve. High-pressure Side is Too High and Low-pressure Side is Too Low Gauge indication Refrigerant cycle Probable cause Corrective action High-pressure side is too high and low-pressure side is too low. Upper side of condenser and high-pressure side are hot, however, liquid tank is not so hot. High-pressure tube or parts located between compressor and condenser are clogged or crushed. q Check and repair or replace malfunctioning parts. q Check lubricant for contamination. AC360A Revision: 2006 July ATC-88 2007 Murano TROUBLE DIAGNOSIS High-pressure Side is Too Low and Low-pressure Side is Too High Gauge indication Refrigerant cycle Probable cause Corrective action A High-pressure side is too low and low-pressure side is too high. Compressor pressure operaHigh- and low-pressure sides tion is improper. become equal soon after com- Replace compressor. B pressor operation stops. Damaged inside compressor packings. Compressor pressure opera- C No temperature difference tion is improper. between high- and low-pres- Replace compressor. sure sides. Damaged inside compressor AC356A packings. D Both High- and Low-pressure Sides are Too Low Gauge indication Both high- and low-pressure sides are too low. AC353A Refrigerant cycle Probable cause q There is a big temperature difference between liquid tank outlet and inlet. Outlet temperature is extremely low. Liquid tank inside is slightly clogged. q Liquid tank inlet and expansion valve are frosted. q Temperature of expansion valve inlet is extremely low as compared with areas near liquid tank. q Expansion valve inlet is frosted. High-pressure pipe located between liquid tank and expansion valve is clogged. q Temperature difference occurs somewhere in highpressure side. Expansion valve and liquid tank are warm or slightly cool when touched. Low refrigerant charge. Leaking fittings or components. There is a big temperature difference between expansion valve inlet and outlet while the valve itself is frosted. Expansion valve closes a little compared with the specification. 1. Improper expansion valve adjustment. 2. Malfunctioning expansion valve. 3. Outlet and inlet may be clogged. An area of the low-pressure pipe is colder than areas near the evaporator outlet. Low-pressure pipe is clogged or crushed. Air flow volume is not enough or is too low. Evaporator is frozen. Corrective action q Replace liquid tank. q Check lubricant for contami- nation. q Check and repair malfunctioning parts. q Check lubricant for contamination. Check refrigerant for leaks. Refer to ATC-144, "Checking for Refrigerant Leaks" . q Remove foreign particles by using compressed air. q Replace expansion valve. q Check lubricant for contami- nation. q Check and repair malfunctioning parts. q Check lubricant for contamination. q Check intake sensor circuit. Refer to ATC-104, "Intake Sensor Circuit" . q Replace compressor. q Repair evaporator fins. q Replace evaporator. q Refer to ATC-72, "Blower Motor Circuit" . E F G H I ATC K L M Revision: 2006 July ATC-89 2007 Murano TROUBLE DIAGNOSIS Low-pressure Side Sometimes Becomes Negative Gauge indication Refrigerant cycle Probable cause Corrective action Low-pressure side sometimes becomes negative. AC354A q Air conditioning system does not function and does not cyclically cool the compartment air. q The system constantly functions for a certain period of time after compressor is stopped and restarted. Refrigerant does not discharge cyclically. Moisture is frozen at expansion valve outlet and inlet. Water is mixed with refrigerant. q Drain water from refrigerant or replace refrigerant. q Replace liquid tank. Low-pressure Side Becomes Negative Gauge indication Refrigerant cycle Probable cause Corrective action Low-pressure side becomes negative. Liquid tank or front/rear side of expansion valve's pipe is frosted or wet with dew. AC362A High-pressure side is closed and refrigerant does not flow. Expansion valve or liquid tank is frosted. Leave the system at rest until no frost is present. Start it again to check whether or not the malfunction is caused by water or foreign particles. q If water is the cause, initially cooling is okay. Then the water freezes causing a blockage. Drain water from refrigerant or replace refrigerant. q If due to foreign particles, remove expansion valve and remove the particles with dry and compressed air (not shop air). q If either of the above methods cannot correct the malfunction, replace expansion valve. q Replace liquid tank. q Check lubricant for contamination. Revision: 2006 July ATC-90 2007 Murano Insufficient Heating SYMPTOM: Insufficient heating INSPECTION FLOW TROUBLE DIAGNOSIS NJS000B7 A B C D E F G H I ATC K L M *1 ATC-55, "Operational Check" *4 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No.13. *7 EC-207, "DTC P0117, P0118 ECT SENSOR" SJIA1231E *2 ATC-66, "Air Mix Door Motor Circuit" *3 ATC-48, "FUNCTION CONFIRMATION PROCEDURE", see No. 4 to 6. *5 ATC-59, "LAN System Circuit" *6 ATC-72, "Blower Motor Circuit" *8 CO-9, "Changing Engine Coolant" *9 CO-15, "Checking Radiator Cap" Revision: 2006 July ATC-91 2007 Murano Noise SYMPTOM: Noise INSPECTION FLOW TROUBLE DIAGNOSIS NJS000B8 *1 ATC-55, "Operational Check" *4 EM-13, "Checking Drive Belts" Revision: 2006 July *2 ATC-135, "Check Disc to Pulley Clearance" SJIA0843E *3 ATC-22, "Maintenance of Lubricant Quantity in Compressor" ATC-92 2007 Murano TROUBLE DIAGNOSIS Self-diagnosis SYMPTOM: Self-diagnosis cannot be performed. INSPECTION FLOW NJS000B9 A B C D E F G H I ATC K SJIA1163E *1 ATC-57, "Power Supply and Ground *2 ATC-95, "Ambient Sensor Circuit" *3 ATC-98, "In-vehicle Sensor Circuit" Circuit for Auto Amp." L *4 ATC-101, "Sunload Sensor Circuit" *5 ATC-104, "Intake Sensor Circuit" *6 ATC-68, "Air Mix Door Motor PBR Circuit" *7 ATC-55, "Operational Check" *8 ATC-36, "SYMPTOM TABLE" M Revision: 2006 July ATC-93 2007 Murano TROUBLE DIAGNOSIS Memory Function SYMPTOM: Memory function does not operate. INSPECTION FLOW NJS000BA *1 ATC-57, "Power Supply and Ground *2 ATC-55, "Operational Check" Circuit for Auto Amp." SJIA1164E *3 ATC-48, "FUNCTION CONFIRMATION PROCEDURE" Revision: 2006 July ATC-94 2007 Murano TROUBLE DIAGNOSIS Ambient Sensor Circuit COMPONENT DESCRIPTION Ambient Sensor The ambient sensor is attached on the radiator core support (left side). It detects ambient temperature and converts it into a resistance value which is then input into the unified meter and A/C amp. NJS000BB A B C D AMBIENT TEMPERATURE INPUT PROCESS RJIA3971E E The unified meter and A/C amp. includes a processing circuit for the ambient sensor input. However, when the temperature detected by the ambient sensor increases quickly, the processing circuit retards the unified meter and A/C amp. function. It only allows the unified meter and A/C amp. to recognize an ambient temperature F increase of 0.33°C (0.6°F) per 100 seconds. As an example, consider stopping for a few minutes after high speed driving. Although the actual ambient tem- perature has not changed, the temperature detected by the ambient sensor will increase. This is because the G heat from the engine compartment can radiate to the front grille area, location of the ambient sensor. DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR H SYMPTOM: Ambient sensor circuit is open or shorted. (21 or - 21 is indicated on unified meter and A/C amp. As a result of performing self-diagnosis STEP-2.) I ATC 1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND 1. Disconnect ambient sensor connector. 2. Turn ignition switch ON. 3. Check voltage between ambient sensor harness connector E15 terminal 1 and ground. 1 Ground OK or NG OK >> GO TO 2. NG >> GO TO 4. : Approx. 5 V K RJIA1461E L M RJIA2017E Revision: 2006 July ATC-95 2007 Murano TROUBLE DIAGNOSIS 2. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between ambient sensor harness connector E15 terminal 2 and unified meter and A/C amp. harness connector M51 terminal 49. 2 49 : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair harness or connector. 3. CHECK AMBIENT SENSOR RJIA2018E Refer to ATC-97, "Ambient Sensor" . OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> 1. Replace ambient sensor. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. 4. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between ambient sensor harness connector E15 terminal 1 and unified meter and A/C amp. harness connector M51 terminal 39. 1 39 : Continuity should exist. 4. Check continuity between ambient sensor harness connector E15 terminal 1 and ground. 1 Ground : Continuity should not exist. RJIA2019E OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP -2. Confirm that code No. 20 is displayed. NG >> Repair harness or connector. Revision: 2006 July ATC-96 2007 Murano TROUBLE DIAGNOSIS COMPONENT INSPECTION Ambient Sensor After disconnecting ambient sensor connector E15, measure resistance between terminals 1 and 2 at sensor side. Refer to the table below. Temperature °C (°F) -15 (5) -10 (14) -5 (23) 0 (32) 5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 (113) If NG, replace ambient sensor. Resistance k 12.73 9.92 7.80 6.19 4.95 3.99 3.24 2.65 2.19 1.81 1.51 1.27 1.07 A B C D E F G RJIA3972E H I ATC K L M Revision: 2006 July ATC-97 2007 Murano TROUBLE DIAGNOSIS In-vehicle Sensor Circuit COMPONENT DESCRIPTION In-vehicle Sensor The in-vehicle sensor is located on instrument driver lower panel. It converts variations in temperature of compartment air drawn from the aspirator into a resistance value. It is then input into the unified meter and A/C amp. Aspirator The aspirator is located on driver's side of heater & cooling unit assembly. It produces vacuum pressure due to air discharged from the heater & cooling unit assembly, continuously taking compartment air in the aspirator. NJS000BC RJIA1802E RJIA3973E RJIA1804E Revision: 2006 July ATC-98 2007 Murano TROUBLE DIAGNOSIS DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR SYMPTOM: In-vehicle sensor circuit is open or shorted. (22 or -22 is A indicated on unified meter and A/C amp. as a result of performing self-diagnosis STEP-2.) B C 1. CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND D RJIA1452E 1. Disconnect in-vehicle sensor connector. E 2. Turn ignition switch ON. 3. Check voltage between in-vehicle sensor harness connector M52 terminal 1 and ground. F 1 Ground : Approx. 5 V OK or NG OK >> GO TO 2. NG >> GO TO 4. G H RJIA2022E 2. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND UNIFIED METER AND A/C AMP. I 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between in-vehicle sensor harness connector M52 terminal 2 and unified meter and A/C amp. harness connector M51 terminal 49. 2 49 : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair harness or connector. 3. CHECK IN-VEHICLE SENSOR ATC K L RJIA2023E M Refer to ATC-100, "In-vehicle Sensor" . OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> 1. Replace in-vehicle sensor. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. Revision: 2006 July ATC-99 2007 Murano TROUBLE DIAGNOSIS 4. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between in-vehicle sensor harness connector M52 terminal 1 and unified meter and A/C amp. harness connector M51 terminal 40. 1 40 : Continuity should exist. 4. Check continuity between in-vehicle sensor harness connector M52 terminal 1 and ground. 1 Ground : Continuity should not exist. RJIA2024E OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> Repair harness or connector. COMPONENT INSPECTION In-vehicle Sensor After disconnecting in-vehicle sensor connector M52, measure resistance between terminals 1 and 2 at sensor side. Refer to the table below. Temperature °C (°F) -15 (5) -10 (14) -5 (23) 0 (32) 5 (41) 10 (50) 15 (59) 20 (68) 25 (77) 30 (86) 35 (95) 40 (104) 45 (113) If NG, replace in-vehicle sensor. Resistance k 12.73 9.92 7.80 6.19 4.95 3.99 3.24 2.65 2.19 1.81 1.51 1.27 1.07 RJIA1805E Revision: 2006 July ATC-100 2007 Murano TROUBLE DIAGNOSIS Sunload Sensor Circuit COMPONENT DESCRIPTION Sunload Sensor The sunload sensor is located on the passenger's side instrument mask. It detects sunload entering through windshield by means of a photo diode. The sensor converts the sunload into a current value which is then input into the unified meter and A/C amp. NJS000BD A B C D SUNLOAD INPUT PROCESS RJIA1806E E The unified meter and A/C amp. also includes a processing circuit which averages the variations in detected sunload over a period of time. This prevents drastic swings in the ATC system operation due to small or quick variations in detected sunload. F For example, consider driving along a road bordered by an occasional group of large trees. The sunload detected by the sunload sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver- ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily G obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord- ingly. H DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR SYMPTOM: Sunload sensor circuit is open or shorted. (25 or -25 is indicated on unified meter and A/C amp. as a result of performing I self-diagnosis STEP-2.) ATC 1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND 1. Disconnect sunload sensor connector. 2. Turn ignition switch ON. 3. Check voltage between sunload sensor harness connector M79 terminal 1 and ground. 1 Ground OK or NG OK >> GO TO 2. NG >> GO TO 4. : Approx. 5 V K RJIA1455E L M RJIA2027E Revision: 2006 July ATC-101 2007 Murano TROUBLE DIAGNOSIS 2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between sunload sensor harness connector M79 terminal 2 and unified meter and A/C amp. harness connector M51 terminal 49. 2 49 : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair harness or connector. 3. CHECK SUNLOAD SENSOR RJIA2028E 1. Reconnect sunload sensor connector and unified meter and A/C amp. connector. 2. Refer to ATC-103, "Sunload Sensor" . OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> 1. Replace sunload sensor. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. 4. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between sunload sensor harness connector M79 terminal 1 and unified meter and A/C amp. harness connector M51 terminal 50. 1 50 : Continuity should exist. 4. Check continuity between sunload sensor harness connector M79 terminal 1 and ground. 1 Ground : Continuity should not exist. RJIA2029E OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> Repair harness or connector. Revision: 2006 July ATC-102 2007 Murano TROUBLE DIAGNOSIS COMPONENT INSPECTION Sunload Sensor Measure voltage between unified meter and A/C amp. harness connector M51 terminal 50 and ground. q When checking sunload sensor, select a place where sunshine directly on it. If NG, replace sunload sensor. A B C D E F G RJIA1807E H I ATC K L M SHA930E Revision: 2006 July ATC-103 2007 Murano TROUBLE DIAGNOSIS Intake Sensor Circuit COMPONENT DESCRIPTION Intake Sensor The intake sensor is located on the heater & cooling unit assembly. It converts temperature of air after it passes through the evaporator into a resistance value which is then input to the unified meter and A/ C amp. DIAGNOSIS PROCEDURE FOR INTAKE SENSOR SYMPTOM: Intake sensor circuit is open or shorted. (24 or -24 is indicated on unified meter and A/C amp. as a result of performing self-diagnosis STEP-2.) NJS000BE RJIA1808E 1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND RJIA1458E 1. Disconnect intake sensor connector. 2. Turn ignition switch ON. 3. Check voltage between intake sensor harness connector M256 terminal 1 and ground. 1 Ground : Approx. 5 V OK or NG OK >> GO TO 2. NG >> GO TO 4. RJIA1809E 2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between intake sensor harness connector M256 terminal 2 and unified meter and A/C amp. harness connector M51 terminal 49. 2 49 : Continuity should exist. OK or NG OK >> GO TO 3. NG >> Repair harness or connector. RJIA1810E Revision: 2006 July ATC-104 2007 Murano TROUBLE DIAGNOSIS 3. CHECK INTAKE SENSOR A Refer to ATC-105, "Intake Sensor" . OK or NG OK >> 1. Replace unified meter and A/C amp. B 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform self- diagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> 1. Replace intake sensor. C 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform selfdiagnosis STEP-2. Confirm that code No. 20 is displayed. D 4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP. 1. Turn ignition switch OFF. E 2. Disconnect unified meter and A/C amp. connector. 3. Check continuity between intake sensor harness connector M256 terminal 1 and unified meter and A/C amp. harness con- F nector M51 terminal 41. 1 41 : Continuity should exist. 4. Check continuity between intake sensor harness connector G M256 terminal 1 and ground. 1 Ground : Continuity should not exist. RJIA1811E H OK or NG OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-48, "FUNCTION CONFIRMATION PROCEDURE" and perform self- I diagnosis STEP-2. Confirm that code No. 20 is displayed. NG >> Repair harness or connector. ATC COMPONENT INSPECTION Intake Sensor After disconnecting intake sensor connector M256, measure resis- K tance between terminals 1 and 2 at sensor side. Refer to the table below. Temperature °C (°F) Resistance k L -15 (5) 18.63 -10 (14) 14.14 M -5 (23) 10.85 0 (32) 8.40 5 (41) 6.57 10 (50) 5.18 15 (59) 4.12 20 (68) 3.30 25 (77) 2.66 30 (86) 2.16 35 (95) 1.77 40 (104) 1.46 45 (113) 1.21 If NG, replace intake sensor. RJIA1812E Revision: 2006 July ATC-105 2007 Murano CONTROLLER CONTROLLER Removal and Installation of A/C and AV Switch REMOVAL Refer to AV-61, "Removal and Installation for A/C and AV Switch" . INSTALLATION Installation is basically the reverse order of removal. PFP:27500 NJS000BF Revision: 2006 July ATC-106 2007 Murano AUTO AMP AUTO AMP Removal and Installation of Unified Meter and A/C Amp. REMOVAL 1. Remove audio unit. Refer to AV-59, "Removal and Installation of Audio Unit" . 2. Remove mounting screws, and then remove unified meter and A/C amp. INSTALLATION Installation is basically the reverse order of removal. PFP:27760 A NJS000BG B C D E RJIA1813E F G H I ATC K L M Revision: 2006 July ATC-107 2007 Murano AMBIENT SENSOR AMBIENT SENSOR Removal and Installation REMOVAL 1. Remove ambient sensor from bracket. 2. Disconnect ambient sensor connector, and then remove ambi- ent sensor. INSTALLATION Installation is basically the reverse order of removal. PFP:27722 NJS000BH RJIA3971E Revision: 2006 July ATC-108 2007 Murano IN-VEHICLE SENSOR IN-VEHICLE SENSOR Removal and Installation REMOVAL 1. Remove instrument driver lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting screw, and then remove in-vehicle sensor. PFP:27720 A NJS000BI B C D INSTALLATION Installation is basically the reverse order of removal. E RJIA1814E F G H I ATC K L M Revision: 2006 July ATC-109 2007 Murano SUNLOAD SENSOR SUNLOAD SENSOR Removal and Installation REMOVAL 1. Remove instrument mask (right side). Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Disconnect sunload sensor connector, and then remove sunload sensor. PFP:27721 NJS000BJ INSTALLATION Installation is basically the reverse order of removal. RJIA1806E Revision: 2006 July ATC-110 2007 Murano INTAKE SENSOR INTAKE SENSOR Removal and Installation REMOVAL PFP:27723 A NJS000BK 1. Remove low-pressure pipe 2 and high-pressure pipe 2. Refer to ATC-139, "Removal and Installation of Low-pressure Pipe 2 and High-pressure Pipe 2" . B CAUTION: Cap or wrap the joint of evaporator, low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with suit- able material such as vinyl tape to avoid the entry of air. C 2. Slide evaporator to passenger side, and then remove intake sensor. D E F RJIA1808E INSTALLATION G Installation is basically the reverse order of removal. CAUTION: q Replace O-rings of low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with new ones, and then H apply compressor oil to it when installing it. q Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sen- sor can be located in the same position. I q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. q Insert piping securely until a click is heard. ATC q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. q When recharging refrigerant, check for leaks. K L M Revision: 2006 July ATC-111 2007 Murano BLOWER UNIT BLOWER UNIT PFP:27200 Removal and Installation REMOVAL 1. Remove instrument passenger lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting nuts, and then remove ECM with bracket attached. 3. Disconnect intake door motor connector and blower fan motor connector. NJS000BL 4. Remove blower unit mounting bolts and screw. 5. Remove harness clips from blower unit. CAUTION: Move blower unit rightward, and remove locating pin (1 part) and joint. Then remove blower unit downward. SJIA1170E 6. Remove blower unit. INSTALLATION Installation is basically the reverse order of removal. CAUTION: Make sure locating pin (1 part) and joint are securely inserted. RJIA1819E Revision: 2006 July ATC-112 2007 Murano Disassembly and Assembly BLOWER UNIT 1. Intake adapter 4. Intake lower case 7. In-cabin microfilter 10. Intake door 1 13. Intake door lever 2 2. Intake box case 5. Blower fan motor assembly 8. Filter cover 11. Intake door lever 1 3. Intake upper case 6. Intake door motor 9. Intake door 2 12. Intake door link NJS000BM A B C D E F G H RJIA1820E I ATC K L M Revision: 2006 July ATC-113 2007 Murano BLOWER UNIT Removal and Installation of Blower Duct REMOVAL 1. Remove instrument panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . 3. Remove mounting nuts, and then remove blower duct. NJS000BN INSTALLATION Installation is basically the reverse order of removal. RJIA4001E Revision: 2006 July ATC-114 2007 Murano BLOWER MOTOR BLOWER MOTOR Removal and Installation REMOVAL PFP:27226 A NJS000BO 1. Remove instrument passenger lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . B 2. Disconnect blower motor connector. 3. Remove mounting screws, and then remove blower motor. C D INSTALLATION Installation is basically the reverse order of removal. E RJIA1822E F G H I ATC K L M Revision: 2006 July ATC-115 2007 Murano INTAKE DOOR MOTOR INTAKE DOOR MOTOR Removal and Installation REMOVAL 1. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . 2. Remove mounting screws, and then remove intake door motor from blower unit. INSTALLATION Installation is basically the reverse order of removal. PFP:27730 NJS000BP RJIA1823E Revision: 2006 July ATC-116 2007 Murano IN-CABIN MICROFILTER IN-CABIN MICROFILTER Removal and Installation FUNCTION Air inside passenger compartment is kept clean at either recirculation or fresh mode by installing in-cabin microfilter into blower unit. PFP:27277 A NJS000BQ B C D REPLACEMENT TIMING RJIA1331E E Replace in-cabin microfilter. Refer to MA-8, "CHASSIS AND BODY MAINTENANCE" in Schedule 1 and MA-9, "CHASSIS AND BODY F MAINTENANCE" in Schedule 2. When replacing filter, affix a caution label inside the glove box. REPLACEMENT PROCEDURES G 1. Remove instrument passenger lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove filter cover, and then remove in-cabin microfilter. 3. Take out in-cabin microfilter from blower unit. H 4. Replace with new one and reinstall on blower unit. 5. Reinstall instrument passenger lower panel. I ATC RJIA1824E K L M Revision: 2006 July ATC-117 2007 Murano HEATER & COOLING UNIT ASSEMBLY HEATER & COOLING UNIT ASSEMBLY Removal and Installation REMOVAL 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Drain coolant from cooling system. Refer to CO-9, "Changing Engine Coolant" . 3. Remove cowl top cover. Refer to EI-20, "COWL TOP" . 4. Disconnect evaporator-side one-touch joints. a. Set a disconnector [high-pressure side (SST: 9253089908), low- pressure side (SST: 9253089916)] on A/C piping. b. Slide a disconnector toward vehicle front until it clicks. c. Slide A/C piping toward vehicle front and disconnect it. CAUTION: Cap or wrap the joint of the low-pressure pipe 1 and highpressure pipe 1 with suitable material such as vinyl tape to avoid the entry of air. 5. Remove clamps, and then disconnect two heater hoses from heater core. PFP:27110 NJS000BR PJIA0098E 6. Remove instrument panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 7. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . 8. Remove clips of vehicle harness from steering member. 9. Remove mounting nuts, and then remove instrument stays (driver side and passenger side). RJIA1825E 10. Remove mounting bolts from heater & cooling unit. RJIA1826E Revision: 2006 July ATC-118 RJIA1828E 2007 Murano HEATER & COOLING UNIT ASSEMBLY 11. Remove rear ventilator duct1 and front floor duct. Refer to ATC-128, "Removal of Rear Ventilator Ducts" and ATC-130, "Removal of Floor Ducts" . A B C D E F PJIA0095E G 12. Remove steering member mounting bolts and steering column assembly mounting nuts, and then remove steering member. 13. Remove heater & cooling unit assembly. H INSTALLATION Installation is basically the reverse order of removal. CAUTION: I q Replace O-rings of low-pressure pipe 1 and high-pressure pipe 1 with new ones, and then apply compressor oil to it when installing it. q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping ATC straight in axial direction. q Insert piping securely until a click is heard. q After piping connection is completed, pull male-side piping by hand to make sure that connection K does not come loose. q When recharging refrigerant, check for leaks. NOTE: L q When filling radiator with coolant, refer to CO-9, "Changing Engine Coolant" . q Recharge the refrigerant. M Heater & cooling unit assembly mounting bolt : 6.8 N·m (0.69 kg-m, 60 in-lb) Steering member mounting bolt and steering column assembly mounting nut : 12 N·m (1.2 kg-m, 9 ft-lb) Revision: 2006 July ATC-119 2007 Murano HEATER & COOLING UNIT ASSEMBLY Disassembly and Assembly NJS000BS 1. Adaptor duct 4. Mode door motor 7. Aspirator duct 10. Heater core 13. Heater core cover 16. Low-pressure pipe 2 Revision: 2006 July 2. Heater & cooling unit case (left) 3. Mode door motor bracket 5. Instrument lower cover bracket 6. Aspirator 8. Front heater duct (left) 9. Sub harness 11. Foot duct (passenger side) 12. Front heater duct (right) 14. Air mix door motor (passenger side) 15. Evaporator cover 17. High-pressure pipe 2 18. Cooler pipe grommet PJIA0096E ATC-120 2007 Murano HEATER & COOLING UNIT ASSEMBLY 19. Heater & cooling unit case (right) 22. Defroster door lever 25. Ventilator door lever 28. Ventilator door 31. Intake sensor bracket 34. Expansion valve 37. Defroster door link 40. Center case 43. Max. cool door (right) 20. Insulator 23. Max. cool door lever 26. Ventilator door link 29. Heater pipe support 32. Adaptor cover 35. Evaporator 38. Max. cool door link 41. Heater pipe grommet : N·m (kg-m, in-lb) : Always replace after every disassembly. 21. Air mix door motor (driver side) 24. Main link 27. Foot duct (left) 30. Intake sensor 33. O-ring 36. Defroster door 39. Max. cool door (left) 42. Air mix door (Slide door) A B C D E F G H I ATC K L M Revision: 2006 July ATC-121 2007 Murano MODE DOOR MOTOR MODE DOOR MOTOR Removal and Installation REMOVAL 1. Remove front heater duct (left). Refer to ATC-129, "Removal of Foot Ducts" . 2. Remove BCM. Refer to BCS-14, "Removal and Installation of BCM" . 3. Remove mode door motor mounting screws. 4. Disconnect connector, and then remove mode door motor. PFP:27731 NJS000BT INSTALLATION Installation is basically the reverse order of removal. RJIA3978E Revision: 2006 July ATC-122 2007 Murano AIR MIX DOOR MOTOR AIR MIX DOOR MOTOR Removal and Installation REMOVAL PFP:27732 A NJS000BU Driver Side B 1. Set the temperature control dial (driver side) at 18°C (60°F), and then disconnect the battery cable from the negative terminal. 2. Remove front heater duct (left). Refer to ATC-129, "Removal of Foot Ducts" . C 3. Remove BCM. Refer to BCS-14, "Removal and Installation of BCM" . 4. Remove mounting screws, and then remove air mix door motor. 5. Disconnect air mix door motor connector. D E F RJIA3979E Passenger Side G 1. Set the temperature control dial (passenger side) at 18°C (60°F), and then disconnect the battery cable from the negative terminal. 2. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . H 3. Remove mounting screws, and then remove air mix door motor. 4. Disconnect air mix door motor connector. I ATC INSTALLATION Installation is basically the reverse order of removal. K RJIA3980E L M Revision: 2006 July ATC-123 2007 Murano HEATER CORE HEATER CORE PFP:27140 Removal and Installation REMOVAL NJS000BV 1. Remove heater & cooling unit assembly. Refer to ATC-118, "HEATER & COOLING UNIT ASSEMBLY" . 2. Remove air mix door motor (passenger side). Refer to ATC-123, "AIR MIX DOOR MOTOR" . 3. Remove foot duct (right). Refer to ATC-129, "Removal of Foot Ducts" . 4. Remove mounting screw, and then remove heater core cover. 5. Remove mounting screw, and then remove heater pipe support and heater pipe grommet. 6. Slide heater core (shown in the figure) to passenger side. INSTALLATION Installation is basically the reverse order of removal. SJIA1189E Revision: 2006 July ATC-124 2007 Murano DUCTS AND GRILLES DUCTS AND GRILLES Removal and Installation COMPONENT LAYOUT PFP:27860 A NJS000BW B C D E F 1. Defroster nozzle 4. Side defroster grille (left) 7. Center ventilator grille (right) 10. Side defroster grille (right) 2. Side defroster duct (left) 5. Side ventilator grille (left) 8. Side ventilator grille (right) 11. Side defroster duct (right) RJIA3981E 3. Ventilator duct 6. Center ventilator grille (left) 9. Instrument panel REMOVAL Removal of Center Ventilator Grilles 1. Remove center ventilator. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting clips, and then remove center ventilator grilles. G H I ATC K L Removal of Side Ventilator Grilles 1. Remove side ventilator assembly. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting screw and clips, and then remove side ventilator grilles. M RJIA1834E Revision: 2006 July ATC-125 RJIA1835E 2007 Murano DUCTS AND GRILLES Removal of Rear Ventilator Grilles 1. Remove center pillar lower garnish. Refer to EI-32, "CENTER PILLAR LOWER GARNISH" . 2. Remove mounting clips, and then remove rear ventilator grilles. Removal of Defroster Nozzle, Ducts and Ventilator Ducts 1. Remove instrument panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting screws, and then remove side defroster ducts, using power tools. 3. Remove mounting screws, and then remove defroster nozzle, using power tools. RJIA1836E 4. Remove mounting screws, and then remove ventilator duct, using power tools. RJIA3982E Revision: 2006 July ATC-126 RJIA3983E 2007 Murano DUCTS AND GRILLES Removal of Side Defroster Grilles 1. Remove instrument side finisher. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting clip, and then remove side defroster grilles. A B C D RJIA1838E E F G H I ATC K L M Revision: 2006 July ATC-127 2007 Murano DUCTS AND GRILLES Removal of Rear Ventilator Ducts 1. Remove center console assembly. Refer to IP-17, "CENTER CONSOLE ASSEMBLY" . 2. Slide rear ventilator duct 2 toward vehicle rear, and then remove it. 3. Remove mounting clips, and then remove rear ventilator duct 1. 4. Remove floor carpet. Refer to EI-34, "FLOOR TRIM" . 5. Remove mounting screws, and then remove rear ventilator duct 3. RJIA1839E Revision: 2006 July ATC-128 RJIA1840E 2007 Murano DUCTS AND GRILLES Removal of Front Heater Ducts 1. Remove mounting screw, and then remove front heater duct A (left). B C 2. Remove mounting clips, and then remove front heater duct (right). D RJIA3984E E F G RJIA3985E Removal of Foot Ducts H 1. Remove instrument driver lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" . 2. Remove mounting screws, and then remove foot duct (driver side). I ATC 3. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . 4. Remove mounting screws, and then remove foot duct (passenger side). K RJIA3986E L M RJIA3987E Revision: 2006 July ATC-129 2007 Murano DUCTS AND GRILLES Removal of Floor Ducts 1. Remove front seats and center console assembly. Refer to SE-101, "FRONT SEAT" and IP-17, "CEN- TER CONSOLE ASSEMBLY" . 2. Slide front floor duct downward, and then remove it. 3. Peel back floor carpet to a point where rear floor duct is visible. 4. Remove mounting clip and harness clip, and then remove rear floor ducts. INSTALLATION Installation is basically the reverse order of removal. RJIA1843E RJIA1844E Revision: 2006 July ATC-130 2007 Murano REFRIGERANT LINES REFRIGERANT LINES HFC-134a (R-134a) Service Procedure SETTING OF SERVICE TOOLS AND EQUIPMENT PFP:92600 A NJS000BX Discharging Refrigerant B WARNING: Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat. Remove HFC-134a (R-134a) from A/C system using certified service equipment meeting requirements of SAE J-2210 [HFC-134a (R-134a) recycling equipment] or J-2209 [HFC-134a (R-134a) C recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming ser- vice. Additional health and safety information may be obtained from refrigerant and lubricant manu- facturers. D E F G H I Evacuating System and Charging Refrigerant WJIA0614E ATC K L M Revision: 2006 July ATC-131 WJIA0615E 2007 Murano REFRIGERANT LINES *1 ATC-22, "LUBRICANT RETURN OPERATION" *4 ATC-85, "PERFORMANCE TEST DIAGNOSIS" *2 ATC-144, "Checking for Refrigerant Leaks" *5 ATC-6, "CONTAMINATED REFRIGERANT" SJIA1275E *3 ATC-146, "CHECKING PROCEDURE" Revision: 2006 July ATC-132 2007 Murano REFRIGERANT LINES Components Refer to ATC-8, "Precautions for Refrigerant Connection" . NJS000BY A B C D E F G H I PJIA0097E ATC K L M Revision: 2006 July ATC-133 2007 Murano REFRIGERANT LINES Removal and Installation of Compressor REMOVAL NJS000D4 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Remove air duct (inlet). Refer to EM-16, "AIR CLEANER AND AIR DUCT" . 3. Remove engine undercover, using power tools. 4. Remove mounting bolts from low-pressure flexible hose and high-pressure flexible hose. CAUTION: Cap or wrap the joint of compressor, low-pressure flexible hose and high-pressure flexible hose with suitable material such as vinyl tape to avoid the entry of air. 5. Disconnect compressor connector. PJIA0123E 6. Remove A/C compressor belt. Refer to EM-13, "DRIVE BELTS" . 7. Remove idler pulley bracket. 8. Remove engine oil cooler hose bracket mounting bolts from compressor, using power tools. RJIA2983E 9. Remove mounting bolts and nut from compressor, using power tools. 10. Remove compressor from passenger side of the vehicle. INSTALLATION Installation is basically the reverse order of removal. Revision: 2006 July ATC-134 SJIA1166E 2007 Murano REFRIGERANT LINES CAUTION: q Replace O-rings of low-pressure flexible hose and high-pressure flexible hose with new ones, and A then apply compressor oil to it when installing it. q When recharging refrigerant, check for leaks. Idler pulley bracket mounting bolts B : 28 N·m (2.9 kg-m, 21 ft-lb) Check Disc to Pulley Clearance Check clearance around entire periphery of clutch disc. Disc to pulley clearance : 0.3 - 0.60 mm (0.012 - 0.024 in) If specified clearance is not obtained, replace compressor. C NJS000IC D E Removal and Installation of Low-pressure Flexible Hose REMOVAL 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Remove cowl top cover. Refer to EI-20, "COWL TOP" . 3. Remove air duct (inlet). Refer to EM-16, "AIR CLEANER AND AIR DUCT" . 4. Remove mounting bolt from low-pressure flexible hose. (Com- pressor side) CAUTION: Cap or wrap the joint of low-pressure flexible hose and compressor with suitable material such as vinyl tape to avoid the entry of air. 5. Remove mounting bolt from low-pressure flexible hose. 6. Remove low-pressure flexible hose. CAUTION: Cap or wrap the joint of low-pressure flexible hose and lowpressure pipe 1 with suitable material such as vinyl tape to avoid the entry of air. F SJIA1167E G NJS000C1 H I ATC K RJIA2986E L M RJIA1851E INSTALLATION Installation is basically the reverse order of removal. CAUTION: q Replace O-rings of low-pressure flexible hose with new ones, and then apply compressor oil to it when installing it. q When recharging refrigerant, check for leaks. Revision: 2006 July ATC-135 2007 Murano REFRIGERANT LINES Removal and Installation of High-pressure Flexible Hose REMOVAL 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Remove air duct (inlet). Refer to EM-16, "AIR CLEANER AND AIR DUCT" . 3. Remove mounting bolt from high-pressure flexible hose (Com- pressor side), and then remove high-pressure flexible hose mounting clip. CAUTION: Cap or wrap the joint of high-pressure flexible hose and compressor with suitable material such as vinyl tape to avoid the entry of air. 4. Remove mounting bolt from high-pressure flexible hose (Condenser side), and then remove high-pressure flexible hose. CAUTION: Cap or wrap the joint of high-pressure flexible hose and condenser with suitable material such as vinyl tape to avoid the entry of air. NJS000C2 RJIA2988E RJIA1853E INSTALLATION Installation is basically the reverse order of removal. CAUTION: q Replace O-rings of high-pressure flexible hose with new ones, and then apply compressor oil to it when installing it. q When recharging refrigerant, check for leaks. Revision: 2006 July ATC-136 2007 Murano REFRIGERANT LINES Removal and Installation of Low-pressure Pipe 1 (Engine Compartment) REMOVAL 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Remove cowl top cover. Refer to EI-20, "COWL TOP" . 3. Remove mounting bolts from low-pressure pipe 1 and low-pressure pipe 1 bracket. 4. Remove high-pressure pipe 1 from clip. CAUTION: Cap or wrap the joint of low-pressure pipe 1 and low-pressure flexible hose with suitable material such as vinyl tape to avoid the entry of air. NJS000C3 A B C D 5. Disconnect one-touch joints. a. Set a disconnector (SST: 9253089916) on A/C piping. b. Slide a disconnector toward vehicle front until it clicks. c. Slide A/C piping toward vehicle front and disconnect it. 6. Remove low-pressure pipe 1. CAUTION: Cap or wrap the joint of low-pressure pipe 1 and 2 with suitable material such as vinyl tape to avoid the entry of air. E RJIA1854E F G H INSTALLATION PJIA0098E I Installation is basically the reverse order of removal. CAUTION: ATC q Replace O-rings of low-pressure pipe 1 and low-pressure flexible hose with new ones, and then apply compressor oil to it when installing it. q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. K q Insert piping securely until a click is heard. q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. L q When recharging refrigerant, check for leaks. Low-pressure pipe 1 bracket mounting bolt M : 4.2 N·m (0.43 kg-m, 37 in-lb) Revision: 2006 July ATC-137 2007 Murano REFRIGERANT LINES Removal and Installation of High-pressure Pipe 1 (Engine Compartment) NJS000C4 REMOVAL 1. Remove low-pressure pipe 1. Refer to ATC-137, "Removal and Installation of Low-pressure Pipe 1 (Engine Compartment)" . 2. Remove radiator reservoir tank. Refer to CO-13, "RADIATOR" . 3. Remove IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R" . 4. Remove power steering oil tank mounting nuts. 5. Remove vehicle harness connector from bracket. 6. Remove high-pressure pipe 1 from clips. 7. Remove high-pressure flexible hose from vehicle clips. 8. Disconnect cooling fan connector. 9. Remove cooling fan harness clips from fan shroud. 10. Remove ground harness terminal mounting bolt. RJIA1856E 11. Disconnect one-touch joint of high-pressure pipe 1. a. Set a disconnector (SST: 9253089908) on A/C piping. b. Slide a disconnector toward vehicle front until it clicks. c. Slide A/C piping toward vehicle front and disconnect it. CAUTION: Cap or wrap the joint of high-pressure pipe 1 and 2 with suitable material such as vinyl tape to avoid the entry of air. 12. Remove mounting bolt, and then remove high-pressure pipe 1. CAUTION: Cap or wrap the joint of high-pressure pipe 1 and condenser with suitable material such as vinyl tape to avoid the entry of air. INSTALLATION Installation is basically the reverse order of removal. Revision: 2006 July ATC-138 RJIA1857E RJIA1855E RJIA1853E 2007 Murano REFRIGERANT LINES CAUTION: q Replace O-rings of high-pressure pipe 1 with new ones, and then apply compressor oil to it when A installing it. q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. B q Insert piping securely until a click is heard. q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. C q When recharging refrigerant, check for leaks. Removal and Installation of Low-pressure Pipe 2 and High-pressure Pipe 2 NJS000C5 REMOVAL D 1. Set the temperature control dial (passenger side) at 18°C (60°F), and then disconnect the battery cable from the negative terminal. 2. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. E 3. Remove cowl top cover. Refer to EI-20, "COWL TOP" . 4. Remove mounting bolt from low-pressure flexible pipe 1 bracket. 5. Remove high-pressure pipe 1 from vehicle clips. F G H 6. Disconnect one-touch joints. a. Set a disconnector [high-pressure side (SST: 9253089908), lowpressure side (SST: 9253089916)] on A/C piping. b. Slide a disconnector toward vehicle front until it clicks. c. Slide A/C piping toward vehicle front and disconnect it. CAUTION: Cap or wrap the joint of low-pressure pipe 1, 2 and highpressure pipe 1, 2 with suitable material such as vinyl tape to avoid the entry of air. RJIA1858E I ATC K L PJIA0098E 7. Remove blower unit. Refer to ATC-112, "BLOWER UNIT" . M 8. Remove air mix door motor (passenger side), foot duct, heater core cover. Refer to ATC-123, "AIR MIX DOOR MOTOR" , ATC-129, "Removal of Foot Ducts" and ATC-124, "HEATER CORE" . 9. Remove mounting screws, and then remove evaporator cover. Revision: 2006 July ATC-139 RJIA3992E 2007 Murano REFRIGERANT LINES 10. Remove mounting bolt, and then remove low-pressure pipe 2 and high-pressure pipe 2. CAUTION: Cap or wrap the joint of evaporator, low-pressure pipe 2 and high-pressure pipe 2 with suitable material such as vinyl tape to avoid the entry of air. RJIA1817E INSTALLATION Installation is basically the reverse order of removal. CAUTION: q Replace O-rings of low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with new ones, and then apply compressor oil to it when installing it. q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. q Insert piping securely until a click is heard. q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. q When recharging refrigerant, check for leaks. Low-pressure pipe 1 bracket mounting bolt : 4.2 N·m (0.43 kg-m, 37 in-lb) Removal and Installation of Liquid Tank REMOVAL 1. Remove condenser. Refer to ATC-141, "Removal and Installation of Condenser" . 2. Clean liquid tank and its surrounding area, and remove dust and rust from tank. CAUTION: Be sure to clean carefully. 3. Remove mounting bolts from liquid tank. NJS000C6 4. Lift liquid tank bracket upward. Remove liquid tank bracket from protruding part of condenser. 5. Slide liquid tank upward, and then remove liquid tank. Revision: 2006 July ATC-140 RJIA1859E RJIA1860E 2007 Murano REFRIGERANT LINES INSTALLATION Install liquid tank, and then install liquid tank bracket on condenser. CAUTION: q Make sure liquid tank bracket is securely installed at protru- sion of condenser. q Make sure liquid tank bracket does not move to a position below center of liquid tank. q Replace O-rings of condenser pipe with new ones, and then apply compressor oil to it when installing it. q When recharging refrigerant, check for leaks. A B C D RJIA1861E Liquid tank bracket (upper side) mounting bolt : 3.4 N·m (0.34 kg-m, 30 in-lb) Liquid tank bracket (lower side) mounting bolt : 5.7 N·m (0.58 kg-m, 50 in-lb) Removal and Installation of Condenser REMOVAL 1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. 2. Remove air duct (inlet). Refer to EM-16, "AIR CLEANER AND AIR DUCT" . 3. Remove engine undercover, using power tools. 4. Drain engine coolant. Refer to CO-9, "Changing Engine Coolant" . 5. Remove cooling fan shroud after removing radiator upper hose. Refer to CO-13, "RADIATOR" . 6. Remove mounting bolt, and then disconnect high-pressure flexible hose and high-pressure pipe 1. CAUTION: Cap or wrap the joint of condenser, high-pressure flexible hose and high-pressure pipe 1 with suitable material such as vinyl tape to avoid the entry of air. 7. Remove radiator upper mount, move radiator and condenser to the engine side. E F NJS000C7 G H I ATC K L 8. Remove mounting bolts, and then remove condenser. CAUTION: Be careful not to damage core surface of condenser and radiator. RJIA1853E M RJIA1862E Revision: 2006 July ATC-141 2007 Murano REFRIGERANT LINES INSTALLATION Installation is basically the reverse order of removal. CAUTION: q Replace O-rings of high-pressure flexible hose and high-pressure pipe 1 with new ones, and then apply compressor oil to it when installing it. q When recharging refrigerant, check for leaks. Condenser mounting bolts : 6.1 N·m (0.62 kg-m, 54 in-lb) Removal and Installation of Refrigerant Pressure Sensor REMOVAL 1. Remove condenser. Refer to ATC-141, "Removal and Installation of Condenser" . 2. Remove refrigerant pressure sensor from condenser. CAUTION: When working, be careful not to damage the condenser. NJS000C8 INSTALLATION Installation is basically the reverse order of removal. CAUTION: Apply compressor oil to O-ring of refrigerant pressure sensor when installing it. Refrigerant pressure sensor : 10.8 N·m (1.1 kg-m, 8.0 ft-lb) RJIA1863E Removal and Installation of Evaporator REMOVAL NJS000C9 1. Remove low-pressure pipe 2 and high-pressure pipe 2. Refer to ATC-139, "Removal and Installation of Low-pressure Pipe 2 and High-pressure Pipe 2" . CAUTION: Cap or wrap the joint of evaporator, low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with suitable material such as vinyl tape to avoid the entry of air. 2. Slide evaporator, and then remove it from heater & cooling unit assembly. 3. Remove intake sensor from evaporator, and then remove evaporator. RJIA1808E Revision: 2006 July ATC-142 2007 Murano REFRIGERANT LINES INSTALLATION Installation is basically the reverse order of removal. A CAUTION: q Replace O-rings of low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with new ones, and then apply compressor oil to it when installing it. B q Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping straight in axial direction. q Insert piping securely until a click is heard. C q After piping connection is completed, pull male-side piping by hand to make sure that connection does not come loose. q O-rings are different from low-pressure pipe 1 (high-pressure pipe 1) and low-pressure pipe 2 D (high-pressure pipe 2). q Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sen- sor can be located in the same position. E q When recharging refrigerant, check for leaks. Low-pressure pipe 1 bracket mounting bolt F : 4.2 N·m (0.43 kg-m, 37 in-lb) Removal and Installation of Expansion Valve REMOVAL 1. Remove evaporator. Refer to ATC-142, "Removal and Installation of Evaporator" . 2. Remove mounting bolts, and then remove expansion valve. CAUTION: Cap or wrap the joint of evaporator with suitable material such as vinyl tape to avoid the entry of air. NJS000CA G H I ATC RJIA1864E K INSTALLATION Installation is basically the reverse order of removal. CAUTION: L q Replace O-rings of evaporator with new ones, and then apply compressor oil to it when installing it. q O-rings are different from low-pressure pipe 1 (high-pressure pipe 1) and low-pressure pipe 2 M (high-pressure pipe 2). q When recharging refrigerant, check for leaks. Expansion valve mounting bolts : 3.9 N·m (0.4 kg-m, 35 in-lb) Revision: 2006 July ATC-143 2007 Murano REFRIGERANT LINES Checking for Refrigerant Leaks NJS000CB Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow extra inspection time in these areas when using either an electrical leak detector or fluorescent dye leak detector (SST: J-42220). If dye is observed, confirm the leak with an electrical leak detector. It is possible a prior leak was repaired and not properly cleaned. When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all system components and connections. When searching for refrigerant leaks using an electrical leak detector, move the probe along the suspected leak area at 1 to 2 inches per second and no further than 1/4 inch from the component. CAUTION: Moving the electrical leak detector probe slower and closer to the suspected leak area will improve the chances of finding a leak. Checking System for Leaks Using the Fluorescent Leak Detector NJS000CC 1. Check A/C system for leaks using the UV lamp and safety goggles (SST: J-42220) in a low sunlight area (area without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain opening indicates an evaporator core assembly (tubes, core or expansion valve) leak. 2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or cloth, with the UV lamp for dye residue. 3. After the leak is repaired, remove any residual dye using dye cleaner (SST: J-43872) to prevent future misdiagnosis. 4. Perform a system performance check and verify the leak repair with an approved electrical leak detector. NOTE: Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be checked are clean. Clean with a dry cloth or blow off with shop air. Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings and may damage the detector. Dye Injection NJS000CD (This procedure is only necessary when recharging the system or when the compressor has seized and was replaced.) 1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm2 , 50 psi). 2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (SST: J-41459). 3. Connect the injector tool to the A/C low-pressure side service valve. 4. Start the engine and switch A/C ON. 5. When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye through the low-pressure service valve using dye injector tool (SST: J-41459) (refer to the manufacture's operating instructions). 6. With the engine still running, disconnect the injector tool from the service valve. CAUTION: Be careful the A/C system or replacing a component, pour the dye directly into the open system connection and proceed with the service procedures. 7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the leak size, operating conditions and location of the leak, it may take from minutes to days for the dye to penetrate a leak and become visible. 8. Attach a blue label as necessary. Revision: 2006 July ATC-144 2007 Murano REFRIGERANT LINES Electrical Leak Detector PRECAUTIONS FOR HANDLING LEAK DETECTOR When performing a refrigerant leak check, use an A/C electrical leak detector (SST) or equivalent. Ensure that the instrument is calibrated and set properly per the operating instructions. The leak detector is a delicate device. In order to use the leak detector properly, read the operating instructions and perform any specified maintenance. 1. Position probe approximately 5 mm (3/16 in) away from point to be checked. 2. When testing, circle each fitting completely with probe. 3. Move probe along component approximately 25 to 50 mm (1 to 2 in)/sec. NJS000CE A B C D SHA196FA E F G H SHA707EA I ATC K SHA706E L M SHA708EA Revision: 2006 July ATC-145 2007 Murano REFRIGERANT LINES CHECKING PROCEDURE To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the leaking refrigerant is not dispersed. 1. Stop the engine. 2. Connect a suitable A/C manifold gauge set (SST: J-39183) to the A/C service valves. 3. Check if the A/C refrigerant pressure is at least 345 kPa (3.52 kg/cm2 , 50 psi) above 16°C (61°F). If less than specification, recover/evacuate and recharge the system with the specified amount of refrigerant. NOTE: At temperatures below 16°C (61°F), leaks may not be detected since the system may not reach 345 kPa (3.52 kg/cm2 , 50 psi). 4. Perform the leak test from the high-pressure side (compressor discharge a to evaporator inlet g) to the low-pressure side (evaporator drain hose h to shaft seal m). Refer to ATC-133, "Components" . Perform a leak check for the following areas carefully. Clean the component to be checked and move the leak detected probe completely around the connection/component. Compressor Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal. Condenser Check the fitting of high-pressure flexible hose and pipe, refrigerant pressure sensor. Liquid tank Check the fitting of refrigerant connection. Service valves Check all around the service valves. Ensure service valve caps are secured on the service valves (to prevent leaks). NOTE: After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any false readings by leak detector. Cooling unit (Evaporator) With engine OFF, turn blower fan on "High" for at least 15 seconds to dissipate any refrigerant trace in the cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer's recommended procedure for actual wait time) before inserting the leak detector probe into the drain hose. Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water or dirt that may be in the drain hose. 5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected leak, then repeat check as outlined above. 6. Do not stop when one leak is found. Continue to check for additional leaks at all system components. If no leaks are found, perform steps 7 - 10. 7. Start the engine. 8. Set the A/C control as follows; a. A/C switch: ON b. MODE door position: VENT (Ventilation) c. Intake door position: Recirculation d. Temperature setting: Max cold e. Fan speed: High 9. Run engine at 1,500 rpm for at least 2 minutes. Revision: 2006 July ATC-146 2007 Murano REFRIGERANT LINES 10. Stop the engine and perform leak check again following steps 4 through 6 above. A Refrigerant leaks should be checked immediately after stopping the engine. Begin with the leak detector at the compressor. The pressure on the high-pressure side will gradually drop after refrigerant circulation stops and pressure on the low-pressure B side will gradually rise, as shown in the graph. Some leaks are more easily detected when pressure is high. C SHA839E D 11. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg- ing equipment gauges. No refrigerant pressure should be displayed. If pressure is displayed, recover refrigerant from equipment lines and then check refrigerant purity. E 12. Confirm refrigerant purity in supply tank using recovery/recycling recharging equipment and refrigerant identifier. 13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrigerant identifier. F 14. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com- ponent if necessary. 15. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks. G 16. Perform A/C performance test to ensure system works properly. H I ATC K L M Revision: 2006 July ATC-147 2007 Murano SERVICE DATA AND SPECIFICATIONS (SDS) SERVICE DATA AND SPECIFICATIONS (SDS) Compressor PFP:00030 NJS000CF Model Type Displacement cm3 (cu in)/rev Cylinder bore × stroke mm (in) Direction of rotation Drive belt Lubricant ZEXEL VALEO CLIMATE CONTROL make DKS-17D Swash plate 175 (10.7) 30.5 (1.20) × 24.0 (0.94) Clockwise (viewed from drive end) Poly V NJS000CG Model Name Capacity m (US fl oz, lmp fl oz) Refrigerant Total in system Compressor (Service part) charging amount ZEXEL VALEO CLIMATE CONTROL make DKS-17D Nissan A/C System Oil Type S (DH-PS) 150 (5.03, 5.3) 150 (5.03, 5.3) NJS000CH Type Capacity kg (lb) Engine Idling Speed Refer to EC-664, "Idle Speed and Ignition Timing" . Belt Tension Refer to EM-143, "DRIVE BELT" . HFC-134a (R-134a) 0.525 (1.16) NJS000CI NJS000CJ Revision: 2006 July ATC-148 2007 MuranoFrameMaker SGML 5.5.6p145J Acrobat Distiller 4.05 for Windows