PG
pg K ELECTRICAL
PG A
SECTION
B
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS C
D
CONTENTS
E
PRECAUTIONS ......................................................... 3 Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" ................................................................. 3 Wiring Diagrams and Trouble Diagnosis ................. 3
POWER SUPPLY ROUTING CIRCUIT ..................... 4 Schematic ............................................................... 4 Wiring Diagram -- POWER -- ................................ 6 BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION ............................................... 6 ACCESSORY POWER SUPPLY -- IGNITION SW. IN ACC OR ON ............................................11 IGNITION POWER SUPPLY -- IGNITION SW. IN ON ................................................................. 12 IGNITION POWER SUPPLY -- IGNITION SW. IN ON AND/OR START ...................................... 13
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) ..................................... 17
System Description ............................................... 17 SYSTEMS CONTROLLED BY IPDM E/R .......... 17 CAN COMMUNICATION LINE CONTROL ........ 17 IPDM E/R STATUS CONTROL .......................... 18
CAN Communication System Description ............. 18 Function of Detecting Ignition Relay Malfunction ... 18 CONSULT-II Function (IPDM E/R) ........................ 19
CONSULT-II BASIC OPERATION ..................... 19 SELF-DIAGNOSTIC RESULTS ......................... 20 DATA MONITOR ................................................ 20 ACTIVE TEST .................................................... 22 Auto Active Test .................................................... 23 DESCRIPTION ................................................... 23 OPERATION PROCEDURE .............................. 23 INSPECTION IN AUTO ACTIVE TEST MODE... 23 Schematic ............................................................. 25 IPDM E/R Terminal Arrangement .......................... 26 IPDM E/R Power/Ground Circuit Inspection ......... 27 Inspection with CONSULT-II (Self-Diagnosis) ....... 28 Removal and Installation of IPDM E/R .................. 29 REMOVAL .......................................................... 29 INSTALLATION .................................................. 29
GROUND CIRCUIT .................................................. 30 F
Ground Distribution ................................................ 30
MAIN HARNESS ................................................ 30
ENGINE ROOM HARNESS ............................... 33 G ENGINE CONTROL HARNESS ......................... 36
BODY HARNESS ............................................... 37
BODY NO. 2 HARNESS .................................... 38 BACK DOOR NO. 2 RH HARNESS ................... 39
H
HARNESS ................................................................ 40
Harness Layout ..................................................... 40 HOW TO READ HARNESS LAYOUT ................ 40 I
OUTLINE ............................................................ 41
MAIN HARNESS ................................................ 42
ENGINE ROOM HARNESS (LH VIEW) ............. 44 J
ENGINE ROOM HARNESS (RH VIEW) ............ 47
ENGINE CONTROL HARNESS ......................... 49
CHASSIS HARNESS ......................................... 51 PG BODY HARNESS ............................................... 53
BODY NO. 2 HARNESS .................................... 55
ROOM LAMP HARNESS ................................... 57 FRONT DOOR LH HARNESS ........................... 58 L
FRONT DOOR RH HARNESS ........................... 58
REAR DOOR LH HARNESS .............................. 59
REAR DOOR RH HARNESS ............................. 59 M
BACK DOOR HARNESS ................................... 60
Wiring Diagram Codes (Cell Codes) ..................... 61
ELECTRICAL UNITS LOCATION ........................... 64
Electrical Units Location ........................................ 64
ENGINE COMPARTMENT ................................. 64
PASSENGER COMPARTMENT ........................ 65
Fuse ....................................................................... 67
Fusible Link ........................................................... 67
Circuit Breaker (Built Into BCM) ............................ 67
HARNESS CONNECTOR ........................................ 68
Description ............................................................. 68
HARNESS CONNECTOR (TAB-LOCKING
TYPE) ................................................................. 68
HARNESS CONNECTOR (SLIDE-LOCKING
TYPE) ................................................................. 69
HARNESS CONNECTOR (DIRECT-CONNECT
Revision: August 2007
PG-1
2004 QX56
SRS COMPONENT TYPE) ................................ 70 ELECTRICAL UNITS ............................................... 71
Terminal Arrangement ........................................... 71 STANDARDIZED RELAY ......................................... 72
Description ............................................................. 72 NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS ....................................... 72 TYPE OF STANDARDIZED RELAYS ................. 72
SUPER MULTIPLE JUNCTION (SMJ) .....................74 Terminal Arrangement ............................................74
FUSE BLOCK-JUNCTION BOX(J/B) ......................76 Terminal Arrangement ............................................76
FUSE AND FUSIBLE LINK BOX .............................77 Terminal Arrangement ............................................77
FUSE AND RELAY BOX ..........................................78 Terminal Arrangement ............................................78
Revision: August 2007
PG-2
2004 QX56
PRECAUTIONS
PRECAUTIONS
PFP:00011
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT A
BELT PRE-TENSIONER"
EKS007NJ
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
G 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
G 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
G 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
Wiring Diagrams and Trouble Diagnosis
EKS007NK
When you read wiring diagrams, refer to the following:
G Refer to GI-15, "How to Read Wiring Diagrams" in GI section.
H
G Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution.
When you perform trouble diagnosis, refer to the following:
I
G Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
G Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.
J
PG
L
M
Revision: August 2007
PG-3
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
POWER SUPPLY ROUTING CIRCUIT Schematic
For detailed ground distribution, refer to PG-30, "Ground Distribution" .
PFP:24110
EKS007NL
Revision: August 2007
PG-4
WKWA2503E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-5
WKWA2504E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
Wiring Diagram -- POWER --
BATTERY POWER SUPPLY -- IGNITION SW. IN ANY POSITION
EKS007NM
Revision: August 2007
PG-6
WKWA2505E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-7
WKWA2506E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
Revision: August 2007
PG-8
WKWA2507E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-9
WKWA2508E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
Revision: August 2007
PG-10
WKWA2509E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
ACCESSORY POWER SUPPLY -- IGNITION SW. IN ACC OR ON
A B C D E F G H I J PG L M
Revision: August 2007
PG-11
WKWA2510E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
IGNITION POWER SUPPLY -- IGNITION SW. IN ON
Revision: August 2007
PG-12
WKWA2511E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
IGNITION POWER SUPPLY -- IGNITION SW. IN ON AND/OR START
A B C D E F G H I J PG L M
Revision: August 2007
PG-13
WKWA2512E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
Revision: August 2007
PG-14
WKWA2513E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-15
WKWA2514E
2004 QX56
POWER SUPPLY ROUTING CIRCUIT
Revision: August 2007
PG-16
WKWA2515E
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7 A
System Description
EKS00 7N N
G
IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block which were originally placed in engine compartment. It controls integrated relays via IPDM E/R control cir-
B
cuits.
G IPDM E/R-integrated control circuits perform ON-OFF operation of relays, CAN communication control,
etc.
C
G It controls operation of each electrical component via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R integrated relays can be removed.
D
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control
E
Using CAN communication lines, it receives signals from the BCM and controls the following lamps:
G Headlamps (Hi, Lo)
G Parking lamps
F
G Tail lamps
G Front fog lamps
2. Wiper control
G
Using CAN communication lines, it receives signals from the BCM and controls the front wipers.
3. Rear window defogger relay control Using CAN communication lines, it receives signals from the BCM and controls the rear window defogger H relay.
4. A/C compressor control Using CAN communication lines, it receives signals from the ECM and controls the A/C compressor I (magnetic clutch).
5. Starter control
Using CAN communication lines, it receives signals from the ECM and controls the starter relay.
J
6. Cooling fan control
Using CAN communication lines, it receives signals from the ECM and controls the cooling fan relays.
7. Horn control
PG
Using CAN communication lines, it receives signals from the BCM and controls the horn relay.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN L H-line), it is possible to transmit a maximum amount of information with minimum wiring. Each control unit can transmit and receive data, and reads necessary information only.
1. Fail-safe control
M
G When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication returns to normal operation, it also returns to normal control.
G Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Headlamp Tail and parking lamps
Cooling fan Front wiper Rear window defogger
Fail-safe mode G With the ignition switch ON, the headlamp (low) is ON. G With the ignition switch OFF, the headlamp (low) is OFF. G With the ignition switch ON, the tail and parking lamps are ON. G With the ignition switch OFF, the tail and parking lamps are OFF. G With the ignition switch ON, the cooling fan HI operates. G With the ignition switch OFF, the cooling fan stops. Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it was in just before fail-safe control was initiated. Rear window defogger relay OFF
Revision: August 2007
PG-17
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Controlled system A/C compressor Front fog lamps
A/C compressor OFF Front fog lamp relay OFF
Fail-safe mode
IPDM E/R STATUS CONTROL In order to save power, IPDM E/R switches status automatically based on each operating condition. 1. CAN communication status
G CAN communication is normally performed with other control units. G Individual unit control by IPDM E/R is normally performed. G When sleep request signal is received from BCM, mode is switched to sleep waiting status. 2. Sleep waiting status G Process to stop CAN communication is activated. G All systems controlled by IPDM E/R are stopped. When 1 second has elapsed after CAN communica-
tion with other control units is stopped, mode switches to sleep status. 3. Sleep status
G IPDM E/R operates in low current-consumption mode. G CAN communication is stopped. G When a change in CAN communication signal is detected, mode switches to CAN communication sta-
tus. G When a change in ignition switch signal is detected, mode switches to CAN communication status.
CAN Communication System Description
EKS007NO
Refer to LAN-5, "CAN COMMUNICATION" .
Function of Detecting Ignition Relay Malfunction
EKS007NP
G When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.
G When the state of the integrated ignition relay does not agree with the state of the ignition switch signal received via CAN communication, the IPDM E/R activates the tail lamp relay.
Ignition switch signal ON OFF ON OFF
Ignition relay status ON OFF OFF ON
Tail lamp relay -- -- --
ON (10 minutes)
NOTE: When the ignition switch is turned ON, the tail lamps are OFF.
Revision: August 2007
PG-18
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
CONSULT-II Function (IPDM E/R)
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
IPDM E/R diagnostic mode
Description
SELF-DIAG RESULTS
Displays IPDM E/R self-diagnosis results.
DATA MONITOR
Displays IPDM E/R input/output data in real time.
CAN DIAG SUPPORT MNTR
The result of transmit/receive diagnosis of CAN communication can be read.
ACTIVE TEST
Operation of electrical loads can be checked by sending drive signal to them.
EKS007NQ
A
B
C
CONSULT-II BASIC OPERATION
CAUTION:
D
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
E
SULT-II CONVERTER to the data link connector, then turn igni-
tion switch ON.
F
G
2. Touch "START (NISSAN BASED VHCL)".
H
BBIA0369E
I
J
3. Touch "IPDM E/R" on "SELECT SYSTEM" screen.
G If "IPDM E/R" is not displayed, print "SELECT SYSTEM" screen, then refer to GI-39, "CONSULT-II Data Link Connector (DLC) Circuit" .
PG
BCIA0029E
L
M
BCIA0030E
Revision: August 2007
PG-19
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
4. Select the desired part to be diagnosed on the "SELECT DIAG MODE" screen.
SELF-DIAGNOSTIC RESULTS Operation Procedure 1. Touch "SELF-DIAG RESULTS" on "SELECT DIAG MODE"
screen.
2. Self-diagnosis results are displayed.
BCIA0031E
Display Item List
WKIA1264E
Display items NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED.
CAN COMM CIRC
CONSULT-II display code
--
Malfunction detection --
U1000
G If CAN communication reception/transmission data has a malfunction, or if any of the control units fail, data reception/transmission cannot be confirmed.
G When the data in CAN communication is not received before the specified time.
TIME CRNT PAST
Possible causes
--
--
--
Any of items listed below have errors:
X
X G TRANSMIT
DIAG
G ECM
G BCM/SEC
NOTE: The details for display of the period are as follows: G CRNT: Error currently detected with IPDM E/R. G PAST: Error detected in the past and placed in IPDM E/R memory.
DATA MONITOR Operation Procedure 1. Touch "DATA MONITOR" on "SELECT DIAG MODE" screen. 2. Touch "ALL SIGNALS", "MAIN SIGNALS" or "SELECTION FROM MENU" on the "DATA MONITOR"
screen.
ALL SIGNALS
All signals will be monitored.
MAIN SIGNALS
Monitors the predetermined item(s).
SELECTION FROM MENU Selects and monitors individual signal(s).
3. Touch "START". 4. Touch the required monitoring item on "SELECTION FROM MENU".
Revision: August 2007
PG-20
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
5. Touch "RECORD" while monitoring to record the status of the item being monitored. To stop recording,
touch "STOP".
A
B
C
D
E
F
G
H
I
J
PG
L
M
Revision: August 2007
PG-21
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
All Signals, Main Signals, Selection From Menu
Item name
CONSULT-II screen display
Display or unit
Monitor item selection
ALL
MAIN SELECTION
SIGNALS SIGNALS FROM MENU
Description
Motor fan request
MOTOR FAN REQ
1/2/3/4
X
X
X
Signal status input from ECM
Compressor request AC COMP REQ ON/OFF
X
X
X
Signal status input from ECM
Position lights request
TAIL & CLR REQ ON/OFF
X
X
X
Signal status input from BCM
Headlamp low beam request
HL LO REQ
ON/OFF
X
X
X
Signal status input from BCM
Headlamp high beam request
HL HI REQ
ON/OFF
X
X
X
Signal status input from BCM
Front fog lghts request
FR FOG REQ ON/OFF
X
X
X
Signal status input from BCM
Front wiper request FR WIP REQ
STOP/1LOW/ LOW/HI
X
X
X
Signal status input from BCM
Wiper auto stop
WIP AUTO STOP
ACT P/STOP P
X
X
X
Output status of IPDM E/R
Wiper protection
WIP PROT
OFF/Block
X
X
X
Control status of IPDM E/R
Starter request
ST RLY REQ
ON/OFF
X
X
Status of input signal NOTE
Ignition relay status
IGN RLY
ON/OFF
X
X
X
Ignition relay status monitored with IPDM E/R
Rear defogger request
RR DEF REQ ON/OFF
X
X
X
Signal status input from BCM
Oil pressure switch OIL P SW
OPEN/CLOSE
X
X
Signal status input from IPDM E/R (function is not enabled)
Hood switch
HOOD SW
OFF
X
Signal status input from IPDM E/R (function is not enabled)
Theft warning horn request
THFT HRN REQ ON/OFF
X
X
Signal status input from BCM
Horn chirp
HORN CHIRP ON/OFF
X
X
Output status of IPDM E/R
Daytime running lamp request
DTRL REQ
ON/OFF
X
X
Signal status input from BCM
NOTE: Perform monitoring of IPDM E/R data with the ignition switch ON. When the ignition switch is in ACC position, display may not be correct.
ACTIVE TEST Operation Procedure 1. Touch "ACTIVE TEST" on "SELECT DIAG-MODE" screen. 2. Touch item to be tested, and check operation. 3. Touch "START". 4. Touch "STOP" while testing to stop the operation.
Test name Rear defogger output
CONSULT-II screen display REAR DEFOGGER
Front wiper (HI, LO) output FRONT WIPER
Cooling fan output
Lamp (HI, LO, TAIL, FOG) output
MOTOR FAN EXTERNAL LAMPS
Description
With a certain ON-OFF operation, the rear defogger relay can be operated.
With a certain operation (OFF, HI, LO), the front wiper relay (Lo, Hi) can be operated.
With a certain operation (1, 2, 3, 4), the cooling fan can be operated.
With a certain operation (OFF, TAIL, LO, HI, FOG), the lamp relay (Low, High, Tail, Fog) can be operated.
Revision: August 2007
PG-22
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Test name
CONSULT-II screen display
Description
Cornering lamp output
CORNERING LAMP
A
--
Horn output
HORN
With a certain ON-OFF operation, the horn relay can be operated.
Auto Active Test
DESCRIPTION
B
EKS00 7N R
G In auto active test mode, operation inspection can be performed when IPDM E/R sends a drive signal to C the following systems:
Rear window defogger
Front wipers
D
Tail and parking lamps
Front fog lamps
Headlamps (Hi, Lo)
E
A/C compressor (magnet clutch)
Cooling fan F
OPERATION PROCEDURE
1. Close hood and front door RH, and lift wiper arms away from windshield (to prevent glass damage by
wiper operation).
G
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield beforehand.
2. Turn ignition switch OFF.
H
3. Turn ignition switch ON and, within 20 seconds, press front door switch LH 10 times. Then turn ignition
switch OFF.
4. Turn ignition switch ON within 10 seconds after ignition switch OFF.
I
5. When auto active test mode is actuated, horn chirps once.
6. After a series of operations is repeated three times, auto active test is completed.
NOTE:
J
When auto active test mode has to be cancelled halfway, turn ignition switch OFF.
CAUTION: Be sure to perform BL-93, "Door Switch Check" when the auto active test cannot be performed. PG
INSPECTION IN AUTO ACTIVE TEST MODE
G When auto active test mode is actuated, the following seven steps are repeated three times. L
M
Revision: August 2007
PG-23
WKIA1972E
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Concept of Auto Active Test
G IPDM E/R actuates auto active test mode when it receives door switch signal from BCM via CAN communication line. Therefore, when auto active test mode is activated successfully, CAN communication between IPDM E/R and BCM is normal.
G If any of the systems controlled by IPDM E/R cannot be operated, possible cause can be easily diagnosed using auto active test.
Diagnosis chart in auto active test mode
Symptom
Inspection contents
Possible cause
YES G BCM signal input circuit
Rear window defogger does not operate.
Perform auto active test. Does rear window defogger operate?
G Rear window defogger relay G Open circuit of rear window defogger NO G IPDM E/R malfunction G Harness or connector malfunction between IPDM E/R and rear window
defogger
Any of front wipers, tail and parking lamps, front fog lamps, and headlamps (Hi, Lo) do not operate.
Perform auto active test. Does system in question operate?
YES NO
G BCM signal input system
G Lamp/wiper motor malfunction G Lamp/wiper motor ground circuit malfunction G Harness/connector malfunction between IPDM E/R and system in
question G IPDM E/R (integrated relay) malfunction
A/C compressor does not operate.
Perform auto active test. Does magnet clutch operate?
YES NO
G BCM signal input circuit G CAN communication signal between BCM and ECM G CAN communication signal between ECM and IPDM E/R G Magnet clutch malfunction G Harness/connector malfunction between IPDM E/R and magnet clutch G IPDM E/R (integrated relay) malfunction
Cooling fan does not operate.
Perform auto active test. Does cooling fan operate?
YES NO
G ECM signal input circuit G CAN communication signal between ECM and IPDM E/R
G Cooling fan motor malfunction G Harness/connector malfunction between IPDM E/R and cooling fan
motor G IPDM E/R (integrated relay) malfunction
Revision: August 2007
PG-24
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Schematic
EKS007NS
A
B
C
D
E
F
G
H
I
J
PG
L
M
Revision: August 2007
PG-25
WKIA4249E
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R Terminal Arrangement
EKS007NT
Revision: August 2007
PG-26
WKIA4231E
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
IPDM E/R Power/Ground Circuit Inspection
1. FUSE AND FUSIBLE LINK INSPECTION
Check that the following fusible links or IPDM E/R fuses are not blown.
Terminal No.
Signal name
1, 2
Battery power
OK or NG
OK >> GO TO 2. NG >> Replace fuse or fusible link.
2. POWER CIRCUIT INSPECTION
Fuse, fusible link No. a, c, d
1. Disconnect IPDM E/R harness connector E118. 2. Check voltage between IPDM E/R harness connector E118 terminals 1 (B/Y), 2 (R) and ground.
Battery voltage should exist.
OK or NG OK >> GO TO 3. NG >> Repair or replace IPDM E/R power circuit harness.
EKS00 7N U
A B C D E F G
3. GROUND CIRCUIT INSPECTION
1. Disconnect IPDM E/R harness connectors E122 and E124. 2. Check continuity between IPDM E/R harness connector E122
terminal 38 (B), and E124 terminal 59 (B) and ground. Continuity should exist.
OK or NG OK >> Inspection End. NG >> Repair or replace ground circuit harness of IPDM E/R.
H
SKIA1987E
I
J
PG
L
WKIA1453E
M
Revision: August 2007
PG-27
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Inspection with CONSULT-II (Self-Diagnosis)
EKS007NV
CAUTION: If a CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be detected in self-diagnosis depending on which control unit(s) carry out CAN communication.
1. SELF-DIAGNOSIS RESULT CHECK
1. Connect CONSULT-II and select "IPDM E/R" on the Diagnosis System Selection screen. 2. Select "SELF-DIAG RESULTS" on the diagnosis mode selection screen. 3. Check display content in self-diagnosis results.
CONSULT-II Display NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED.
CAN COMM CIRC
CONSULT-II
TIME
display code CRNT PAST
Details of diagnosis result
--
--
--
No malfunction
U1000
Any of items listed below have errors:
G TRANSMIT DIAG
X
X
G ECM
G BCM/SEC
NOTE: The Details for Display for the Period are as follows: G CRNT: Error currently detected by IPDM E/R.
G PAST: Error detected in the past and stored in IPDM E/R memory. Contents displayed
NO DTC DETECTED. FURTHER TESTING MAY BE REQUIRED.>>Inspection End. CAN COMM CIRC>>Print out the self-diagnosis result and refer to LAN-5, "CAN COMMUNICATION" .
Revision: August 2007
PG-28
2004 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Removal and Installation of IPDM E/R
REMOVAL 1. Disconnect negative battery cable.
2. Remove IPDM E/R upper cover.
EKS007NW
A
B
C
3. Release 2 clips and pull IPDM E/R up from case. 4. Disconnect IPDM E/R connectors and remove the IPDM E/R.
D
WKIA1454E
E
F
G
INSTALLATION Installation is in the reverse order of removal.
H
WKIA1696E
I
J
PG
L
M
Revision: August 2007
PG-29
2004 QX56
GROUND CIRCUIT
Ground Distribution
MAIN HARNESS
GROUND CIRCUIT
PFP:24080
EKS007NX
Revision: August 2007
PG-30
WKIA3525E
2004 QX56
GROUND CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-31
WKIA3526E
2004 QX56
GROUND CIRCUIT
Revision: August 2007
PG-32
WKIA3527E
2004 QX56
GROUND CIRCUIT
ENGINE ROOM HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-33
WKIA4232E
2004 QX56
GROUND CIRCUIT
Revision: August 2007
PG-34
WKIA3528E
2004 QX56
GROUND CIRCUIT
A B C D E F G H I J PG L M
Revision: August 2007
PG-35
WKIA1459E
2004 QX56
ENGINE CONTROL HARNESS
GROUND CIRCUIT
Revision: August 2007
PG-36
WKIA1460E
2004 QX56
GROUND CIRCUIT
BODY HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-37
WKIA1991E
2004 QX56
BODY NO. 2 HARNESS
GROUND CIRCUIT
Revision: August 2007
PG-38
WKIA4250E
2004 QX56
GROUND CIRCUIT
BACK DOOR NO. 2 RH HARNESS
A
B
C
D
E
F
G H
I
WKIA1975E
J PG
L
M
Revision: August 2007
PG-39
2004 QX56
HARNESS
HARNESS
PFP:24010
Harness Layout
HOW TO READ HARNESS LAYOUT The following Harness Layouts use a map style grid to help locate connectors on the drawings: G Main Harness G Engine Room Harness LH View (Engine Compartment) G Engine Room Harness RH View (Engine Compartment) G Engine Control Harness G Chassis Harness G Body Harness G Body No. 2 Harness To use the grid reference 1. Find the desired connector number on the connector list. 2. Find the grid reference. 3. On the drawing, find the crossing of the grid reference letter column and number row. 4. Find the connector number in the crossing zone. 5. Follow the line (if used) to the connector.
EKS007NY SEL252V
CONNECTOR SYMBOL Main symbols of connector (in Harness Layout) are indicated below.
Connector type
Water proof type
Male
Female
Standard type
Male
Female
G Cavity: 4 or Less G Relay connector
G Cavity: From 5 to 8
G Cavity: 9 or More
G Ground terminal etc.
--
Revision: August 2007
PG-40
2004 QX56
OUTLINE
HARNESS
A
B
C
D
E
F
G H
I
WKIA4233E
J PG
L
M
Revision: August 2007
PG-41
2004 QX56
MAIN HARNESS
HARNESS
Revision: August 2007
PG-42
WKIA4251E
2004 QX56
HARNESS
Revision: August 2007
PG-43
A B C D E F G H I J PG L M
WKIA4252E
2004 QX56
HARNESS
ENGINE ROOM HARNESS (LH VIEW) Engine Compartment
WKIA3530E
Refer to PG-47, "ENGINE ROOM HARNESS (RH VIEW)" for continuation of engine room harness.
Revision: August 2007
PG-44
2004 QX56
HARNESS
Revision: August 2007
PG-45
A B C D E F G H I J PG L M
WKIA3531E
2004 QX56
Passenger Compartment
HARNESS
Revision: August 2007
PG-46
WKIA2706E
2004 QX56
HARNESS
ENGINE ROOM HARNESS (RH VIEW)
Engine Compartment
A
B
C
D
E
F
G
H
I
J
PG
L
M
WKIA4235E
Refer to PG-44, "ENGINE ROOM HARNESS (LH VIEW)" for continuation of engine room harness.
Revision: August 2007
PG-47
2004 QX56
HARNESS
Revision: August 2007
PG-48
WKIA4236E
2004 QX56
HARNESS
ENGINE CONTROL HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-49
WKIA4237E
2004 QX56
HARNESS
Revision: August 2007
PG-50
WKIA4238E
2004 QX56
HARNESS
CHASSIS HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-51
WKIA2710E
2004 QX56
HARNESS
Revision: August 2007
PG-52
WKIA4239E
2004 QX56
HARNESS
BODY HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-53
WKIA3561E
2004 QX56
HARNESS
Revision: August 2007
PG-54
WKIA2713E
2004 QX56
HARNESS
BODY NO. 2 HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-55
WKIA3538E
2004 QX56
HARNESS
Revision: August 2007
PG-56
WKIA3562E
2004 QX56
HARNESS
ROOM LAMP HARNESS
A B C D E F G H I J PG L M
Revision: August 2007
PG-57
WKIA3537E
2004 QX56
FRONT DOOR LH HARNESS
HARNESS
FRONT DOOR RH HARNESS
WKIA3535E
Revision: August 2007
PG-58
WKIA3536E
2004 QX56
REAR DOOR LH HARNESS
HARNESS
REAR DOOR RH HARNESS
A
B
C
D
E
F
G H
WKIA2718E
I
J
PG
L
M
Revision: August 2007
PG-59
WKIA3539E
2004 QX56
BACK DOOR HARNESS
HARNESS
Revision: August 2007
PG-60
WKIA3540E
2004 QX56
HARNESS
Wiring Diagram Codes (Cell Codes)
EKS007NZ
Use the chart below to find out what each wiring diagram code stands for.
A
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
Code
Section
Wiring Diagram Name
B
A/C,A
ATC
Auto Air Conditioner
A/SUSP
RSU
Rear Air Suspension
C
AF1B1
EC
Air Fuel Ratio Sensor 1 (Bank 1)
AF1B2
EC
Air Fuel Ratio Sensor 1 (Bank 2)
AF1HB1
EC
Air Fuel Ratio Sensor 1 (Bank 1)
D
AF1HB2
EC
Air Fuel Ratio Sensor 1 (Bank 2)
APPS1
EC
Accelerator Pedal Position Sensor
APPS2
EC
Accelerator Pedal Position Sensor
E
APPS3
EC
Accelerator Pedal Position Sensor
ASC/BS
EC
ASCD Brake Switch
ASC/SW
EC
ASCD Steering Switch
F
ASCBOF
EC
ASCD Brake Switch
ASCIND
EC
ASCD Indicator
A/T
AT
A/T Assembly
G
AT/IND
DI
A/T Indicator Lamp
AUDIO
AV
Audio
AUTO/DP
SE
Automatic Drive Positioner
H
AUTO/L
LT
Auto Light Control
B/CLOS
BL
Back Door Auto Closure System
BACK/L
LT
Back-up Lamp
I
BRK/SW
EC
Brake Switch
CAN
EC
CAN Communication Line
CAN
LAN
CAN System
J
CHARGE
SC
Charging System
CHIME
DI
Warning Chime
CLOCK
DI
Clock
PG
COMBSW
LT
Combination Switch
COMM
AV
Audio Visual Communication System
COMPAS
DI
Compass and Thermometer
L
COOL/F
EC
Cooling Fan Control
D/LOCK
BL
Power Door Lock
DEF
GW
Rear Window Defogger
M
DTRL
LT
Headlamp - With Daytime Light System
DVD
AV
DVD Entertainment System
ECM/PW
EC
ECM Power Supply for Back-Up
ECTS
EC
Engine Coolant Temperature Sensor
ETC1
EC
Electric Throttle Control Function
ETC2
EC
Throttle Control Motor Relay
ETC3
EC
Throttle Control Motor
F/FOG
LT
Front Fog Lamp
F/PUMP
EC
Fuel Pump
FTTS
EC
Fuel Tank Temperature Sensor
FUELB1
EC
Fuel Injection System Bank 1
FUELB2
EC
Fuel Injection System Bank 2
H/AIM
LT
Headlamp Aiming Control
H/LAMP
LT
Headlamp
HORN
WW
Horn
Revision: August 2007
PG-61
2004 QX56
HSEAT IATS ICC ICCBOF ICC/BS ICC/SW I/MIRR IGNSYS ILL INJECT INT/L KEYLES KS MAFS MAIN METER MIL/DL MIRROR NATS NAVI O2H2B1 O2H2B2 O2S2B1 O2S2B2 P/SCKT PGC/V PHASE PNP/SW POS POWER PRE/SE PS/SEN R/VIEW RP/SEN SEAT SEN/PW SHIFT SONAR SROOF SRS START STOP/L T/TOW T/WARN TAIL/L T/F TPS1 TPS2 TPS3 TRNSCV TURN VDC
Revision: August 2007
SE EC ACS EC EC EC GW EC LT EC LT BL EC EC EC DI EC GW BL AV EC EC EC EC WW EC EC EC EC PG EC EC DI EC SE EC AT DI RF SRS SC LT LT WT LT TF EC EC EC BL LT BRC
HARNESS
Heated Seat Intake Air Temperature Sensor Intelligent Cruise Control ICC Brake Switch ICC Steering Switch ICC Brake Switch Inside Mirror (Auto Anti-Dazzling Mirror) Ignition System Illumination Injector Room/Map, Vanity, Cargo, Personal, Foot, Step, and Puddle Lamps Remote Keyless Entry System Knock Sensor Mass Air Flow Sensor Main Power Supply and Ground Circuit Speedometer, Tachometer, Temp. and Fuel Gauges Malfunction Indicator Lamp Door Mirror Nissan Anti-Theft System Navigation System Rear Heated Oxygen Sensor 2 Heater Bank 1 Rear Heated Oxygen Sensor 2 Heater Bank 2 Heated Oxygen Sensor 2 Bank 1 Heated Oxygen Sensor 2 Bank 2 Power Socket EVAP Canister Purge Volume Control Solenoid Valve Camshaft Position Sensor (PHASE) (Bank 1) Park/Neutral Position Switch Crankshaft Position Sensor (POS) Power Supply Routing EVAP Control System Pressure Sensor Power Steering Pressure Sensor Rear View Monitor Refrigerant Pressure Sensor Power Seat (Without Memory) Sensor Power Supply A/T Shift Lock System Rear Sonar System Sunroof Supplemental Restraint System Starting System Stop Lamp Trailer Tow Low Tire Pressure Warning System Parking, License and Tail Lamps Transfer Case Throttle Position Sensor Throttle Position Sensor Throttle Position Sensor HOMELINK® Universal Transceiver Turn Signal and Hazard Warning Lamps Vehicle Dynamic Control System
PG-62
2004 QX56
HARNESS
VEHSEC
BL
Vehicle security (theft warning) system
VENT/V
EC
EVAP Canister Vent Control Valve
A
W/ANT
AV
Audio Antenna
WARN
DI
Warning Lamps
WINDOW
GW
Power Window
B
WIP/R
WW
Rear Wiper and Washer
WIPER
WW
Front Wiper and Washer
C
D
E
F
G
H
I
J
PG
L
M
Revision: August 2007
PG-63
2004 QX56
ELECTRICAL UNITS LOCATION
ELECTRICAL UNITS LOCATION Electrical Units Location
ENGINE COMPARTMENT
PFP:25230
EKS007O0
Revision: August 2007
PG-64
WKIA2014E
2004 QX56
ELECTRICAL UNITS LOCATION
PASSENGER COMPARTMENT
A B C D E F G H I J PG L M
Revision: August 2007
PG-65
WKIA4240E
2004 QX56
ELECTRICAL UNITS LOCATION
Revision: August 2007
PG-66
WKIA2015E
2004 QX56
ELECTRICAL UNITS LOCATION
Fuse
G If fuse is blown, be sure to eliminate cause of incident before installing new fuse.
G Use fuse of specified rating. Never use fuse of more than specified rating.
G Do not partially install fuse; always insert it into fuse holder properly.
G Remove fuse for "ELECTRICAL PARTS (BAT)" if vehicle is not used for a long period of time.
EKS007O1
A
B
C
D
CEL083
Fusible Link
EKS007O2
A melted fusible link can be detected either by visual inspection or by feeling with finger tip. If its condition is E
questionable, use circuit tester or test lamp.
CAUTION: G If fusible link should melt, it is possible that critical circuit (power supply or large current carrying F
circuit) is shorted. In such a case, carefully check and eliminate cause of incident.
G Never wrap outside of fusible link with vinyl tape.
G Never let fusible link touch any other wiring harness, vinyl or rubber parts.
G
Circuit Breaker (Built Into BCM)
EKS007O3
For example, when current is 30A, the circuit is broken within 8 to 20
H
seconds.
A circuit breaker is used for the following systems:
G Power windows
I
G Power door locks
G Remote keyless entry system
G Power sunroof
J
G Rear window wiper
SBF284E
PG
L
M
Revision: August 2007
PG-67
2004 QX56
HARNESS CONNECTOR
HARNESS CONNECTOR
PFP:B4341
Description
HARNESS CONNECTOR (TAB-LOCKING TYPE)
EKS007O4
G The tab-locking type connectors help prevent accidental looseness or disconnection.
G The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the illustration below.
Refer to the next page for description of the slide-locking type connector.
CAUTION: Do not pull the harness or wires when disconnecting the connector. [Example]
Revision: August 2007
PG-68
SEL769DA
2004 QX56
HARNESS CONNECTOR
HARNESS CONNECTOR (SLIDE-LOCKING TYPE) G A new style slide-locking type connector is used on certain systems and components, especially those A
related to OBD.
G The slide-locking type connectors help prevent incomplete locking and accidental looseness or discon-
nection.
B
G The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the illustration below.
CAUTION:
C
G Do not pull the harness or wires when disconnecting the connector.
G Be careful not to damage the connector support bracket when disconnecting the connector.
[Example]
D
E
F
G
H
I
J
PG
L
M
AEL299C
Revision: August 2007
PG-69
2004 QX56
HARNESS CONNECTOR
HARNESS CONNECTOR (DIRECT-CONNECT SRS COMPONENT TYPE) G SRS direct-connect type harness connectors are used on certain SRS components such as air bag mod-
ules and seat belt pre-tensioners. G Always pull up to release black locking tab prior to removing connector from SRS component. G Always push down to lock black locking tab after installing connector to SRS component. When locked,
the black locking tab is level with the connector housing. CAUTION: G Do not pull the harness or wires when removing connectors
from SRS components.
WHIA0103E
Revision: August 2007
PG-70
2004 QX56
ELECTRICAL UNITS Terminal Arrangement
ELECTRICAL UNITS
PFP:23710
A
EKS007O5
B C D E F G H I J PG L M
Revision: August 2007
PG-71
WKIA3542E
2004 QX56
STANDARDIZED RELAY
STANDARDIZED RELAY
Description
NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
PFP:25230
EKS007O6
TYPE OF STANDARDIZED RELAYS
SEL881H
SEL882H
1M
1 Make
2M
2 Make
1T
1 Transfer
1M·1B
1 Make 1 Break
Revision: August 2007
PG-72
2004 QX56
STANDARDIZED RELAY
A B C D E F G H I J PG L M
Revision: August 2007
PG-73
WKIA0253E
2004 QX56
SUPER MULTIPLE JUNCTION (SMJ)
SUPER MULTIPLE JUNCTION (SMJ) Terminal Arrangement
PFP:84341
EKS007O7
Revision: August 2007
PG-74
LKIA0385E
2004 QX56
SUPER MULTIPLE JUNCTION (SMJ)
A B C D E F G H I J PG L M
Revision: August 2007
PG-75
WKIA1845E
2004 QX56
FUSE BLOCK-JUNCTION BOX(J/B)
FUSE BLOCK-JUNCTION BOX(J/B) Terminal Arrangement
PFP:24350
EKS007O8
Revision: August 2007
PG-76
WKIA2016E
2004 QX56
FUSE AND FUSIBLE LINK BOX
FUSE AND FUSIBLE LINK BOX Terminal Arrangement
PFP:24381
A
EKS007O9
B C D E F G H I J PG L M
Revision: August 2007
PG-77
WKIA3543E
2004 QX56
FUSE AND RELAY BOX Terminal Arrangement
FUSE AND RELAY BOX
PFP:24012
EKS007OA
Revision: August 2007
PG-78
WKIA4248E
2004 QX56
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