DRIVE MODE SYSTEM
PRECAUTIONS
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along 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. Information necessary to service the system safely is included in the "SRS AIR BAG" and "SEAT BELT" of this Service Manual.
WARNING: Always observe the following items for preventing accidental activation.
- To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision that would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
- Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see "SRS AIR BAG".
- Never 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.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING: Always observe the following items for preventing accidental activation.
- When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing serious injury.
- When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
The diagram illustrates the location of key components within the vehicle's cabin and engine bay. On the center console, the Drive Mode switch (labeled '5') and the D-MODE select switch (labeled '6') are visible, along with the Multi Display Unit (labeled 'A') integrated into the dashboard. Other components are indicated by numbers: 1. A/C auto amp, 2. ECM (Engine Control Module), 3. TCM (Transmission Control Module), and 4. EPS control unit (Electric Power Steering control unit).
Component Description
| Part name | Description |
| Multi display unit | Transmits the ON/OFF status of each mode of the drive mode switch (NORMAL, SPORT, ECO) to TCM (CVT models), ECM (M/T models), EPS control unit and the A/C auto amp via CAN communication. |
| ECM | Based on the mode signals received from TCM (CVT models) or multi display unit (M/T models) via CAN communication, changes over the throttle position and other characteristics. |
| TCM | Based on the mode signals received from the multi display unit via CAN communication, changes over the gear shift line and other characteristics. |
| EPS control unit | Based on the mode signals received from the multi display unit via CAN communication, changes over the steering assist characteristic. |
| A/C auto amp | Based on the ECO mode signal received from the multi display unit via CAN communication, changes over the set temperature correction. |
Multi Display Unit
DESCRIPTION
- The multi display unit connects to other units via CAN communication and performs the drive mode control.
- The following 3 drive modes are available: NORMAL, SPORT, and ECO.
- The drive mode can be changed over as desired by pressing the D-MODE select switch. The characteristics of the engine, CVT, steering and air conditioner are changed accordingly.
- The display shows the current drive mode (NORMAL, SPORT, ECO) as well as the vehicle information for the mode.
VEHICLE INFORMATION DISPLAY
Drive Mode
| Item | Display content | Display Description |
| NORMAL mode | Displays the input voltage to the multi display unit in 5 grades. Displays the engine torque in 5 grades. | Shows voltage and torque levels. |
| SPORT mode | Displays the boost pressure in 5 grades. | Shows boost pressure levels. |
| ECO mode | Displays the instantaneous fuel consumption in 5 grades. | Shows fuel consumption levels. |
SYSTEM
System Description
SYSTEM DIAGRAM
The system diagram shows the flow of information via CAN communication. The Multi Display Unit transmits operation status signals, including ECO mode signal, NORMAL mode signal, and SPORTS mode signal, to the ECM, TCM, EPS control unit, and A/C auto amp. The ECM, TCM, and EPS control unit are noted as either M/T models (*1) or CVT models (*2) where applicable. The A/C auto amp receives the ECO mode signal.
CONTROL DESCRIPTION
The drive mode switch in the controller of the multi display unit is used to change over the vehicle mode and thus change the control characteristics for the engine, transaxle, steering, and air conditioner.
Function Apply List
| MR16DDT | ||
| M/T | CVT | |
| SPORTS ENGINE | X | X |
| SPORTS CVT | X | |
| SPORTS STEERING | X | X |
| ECO ENGINE | X | X |
| ECO CVT | X | |
| ECO AIR CONDITIONER | X | X |
With the NORMAL mode as the base mode, the control of vehicle characteristics is changed over to the following modes:
- SPORT: The control characteristics for the engine, transaxle, and steering system are changed so that a sporty feel is created in the driving behavior.
- ECO: The control characteristics for the engine, transaxle, and automatic air conditioner are changed to help improve the practical fuel economy.
ENGINE, TRANSAXLE, STEERING, AIR CONDITIONER CONTROL
| Control item | Control mode | Control | ||
| SPORT | NORMAL | ECO | ||
| ENGINE | ||||
| Throttle position characteristic | X Half open | -- | -- | Improves the engine response to acceleration pedal operation and enhances the torque feel. |
| -- | -- | X Late opening | Accelerates gently to assist in ECO driving. | |
| Speed limiter for throttle position | -- | -- | X | Controls the throttle position to a smaller level than NORMAL to help improve the practical fuel consumption. |
| High speed gear shift line | X | -- | -- | Keeps the engine speed at a high level and improves the acceleration dynamism and response. |
| TRANSAXLE | ||||
| Downshift upon braking | X | -- | -- | Performs downshift upon braking before cornering to prevent a drop in the engine speed. |
| Cornering ratio hold | X | -- | -- | Helps the vehicle clear a curve smoothly by restricting shift changes during cornering. |
| Low speed gear shift line | -- | -- | X | Improves the practical fuel economy by controlling the engine speed to a low level. |
| STEERING | ||||
| Assist characteristic | X | -- | -- | Changes the steering assist characteristic to enhance a stable steering feel. |
| AIR CONDITIONER | ||||
| Air inlet control | -- | -- | X | Reduces the engine load by optimizing the air conditioner control to a level that does not adversely affect the interior comfort and thus helps improve the practical fuel economy. |
| Blower fan control | -- | -- | X | Reduces the engine load by optimizing the air conditioner control to a level that does not adversely affect the interior comfort and thus helps improve the practical fuel economy. |
HANDLING PRECAUTION
NISSAN Dynamic Control System
The engine torque, engine power, boost pressure, and instantaneous fuel consumption are provided for information purposes only. They are not intended to prompt the driver to adjust driving style. The readings may be slightly delayed relative to the actual vehicle behaviors. This is not a malfunction.
The voltmeter reading cannot be used as an indicator for battery replacement because it indicates the input voltage to the multi display unit, not the battery voltage.
The ECO information screen is operable only while the vehicle is stopped.
If no time setting is performed, the daily and weekly fuel consumption history data are not displayed.
The readings may differ from the actual values depending on driving conditions.
ECU DIAGNOSIS INFORMATION
MULTI DISPLAY UNIT
List of ECU Reference
| ECU | Reference |
| Multi display unit | AV-146, "Reference Value" AV-148, "DTC Inspection Priority Chart" AV-149, "DTC Index" |
WIRING DIAGRAM
INTEGRATED CONTROL SYSTEM
Wiring Diagram
The wiring diagram illustrates the integrated control system's electrical connections. Power is supplied from the BATTERY through a 10A fuse to the IGNITION SWITCH (ON or START). The Multi Display Unit (M90) is connected to the ignition switch and receives power. It communicates via DATA LINES (CAN communication) with the ECM (E18), TCM (F81), EPS CONTROL UNIT (M37), and A/C AUTO AMP (E35). The diagram also shows connections to the IPDM E/R (E13), COMBINATION METER (M34), and BCM (M68) for broader vehicle integration. The diagram indicates connections to the CAN system.
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
Work Flow
The troubleshooting flowchart outlines the diagnostic process. It begins with 'Start trouble diagnosis'. Step 1 is 'Obtain information about malfunction' from the customer. Step 2 is 'Check symptom'. Step 3 is 'Perform self-diagnosis with CONSULT' to check DTC. If DTC is detected, proceed to Step 4 'Perform DTC/CIRCUIT DIAGNOSIS' and repair/replace parts, printing DTC and Freeze Frame Data. If DTC is not detected, proceed to Step 5 'Perform trouble diagnosis by symptom'. Step 6 is 'Final check' to confirm the malfunction is resolved. The process ends with 'End of trouble diagnosis'.
REMOVAL AND INSTALLATION
MULTI DISPLAY UNIT
Exploded View
The exploded view diagram shows the components for disassembly and installation of the Multi Display Unit. The parts shown are: 1. Silencer tape, 2. Multi display unit, 3. Silencer tape, 4. Clip, and 5. Control finisher.
REMOVAL
Refer to IP-11, "Exploded View".
CAUTION:
- When performing the work, use a shop cloth to protect the parts from damage.
- Always fix the harness clamp in position.
INSTALLATION
Install in the reverse order of removal.
