Nissan Rogue Service Manual: System description

COMPONENT PARTS

Component Parts Location

1. Instrument lower panel LH
2. Rear final drive assembly
3. Rear wheel house outer panel in luggage room of left side

AWD Control Unit

• Controls driving force distribution by signals from each sensor from front wheel driving mode (100:0) to 4- wheel driving mode (50:50).
•  Front wheel driving conditions is available by fail-safe function if malfunction is detected in AWD system.
•  AWD actuator relay is integrated with AWD control unit, and supplies AWD solenoid with voltag

Electric Controlled Coupling

Electric controlled coupling is integrated with rear final drive and transmits driving force to rear final drive. For operation, refer to DLN-12, "Operation Description".

AWD Solenoid

Controls electric controlled coupling by command current from AWD control unit.

AWD Lock Switch

Every time AWD lock switch is pressed, AUTO mode and LOCK mode switch each other.

STRUCTURE AND OPERATION

Sectional View

1. Transfer cover
2.  Transfer case
3.  Ring gear bearing (transfer case side)
4.  Ring gear shaft
5. Pinion bearing
6.  Drive pinion
7.  Companion flange
8.  Ring gear
9.  Ring gear bearing (transfer cover side)

Operation Description

POWER TRANSFER DIAGRAM

ELECTRIC CONTROLLED COUPLING

1.  The AWD control unit supplies command current to electric controlled coupling (AWD solenoid).
2.  The control clutch is engaged by electromagnet and torque is detected in control clutch.
3.  The cam operates in response to control clutch torque and applies pressure to main clutch.
4.  The main clutch transmits torque to front wheels according to pressing power.

• Transmission torque to the rear wheels is determined according to command current.

SYSTEM

AWD SYSTEM

AWD SYSTEM : System Description

SYSTEM DIAGRAM

Signal with Communication Line

Major signal transmission between each unit via CAN communication lines are shown in the following table.

DESCRIPTION

•  AWD controls distribution of drive power between front-wheel drive (100:0) and 4-wheel drive (50:50) conditions according to signals from sensors.
•  By receiving the steering angle sensor signal, yaw rate sensor signal, side G sensor signal and decel G sensor signal, vehicle with VDC corrects a torque distribution for front and rear wheels according to a driving operation and a behavior of the vehicle during cornering and improves drivability and safety on a slippery road surface.
•  Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
•  AWD mode makes possible stable driving possible with no wheel spin, on snowy roads or other slippery surfaces.
•  On roads which do not require 4-wheel drive, it contributes to improved fuel economy by driving in conditions close to front-wheel drive.
•  Sensor inputs determine the vehicle's turning condition, and tight cornering/braking are controlled by distributing optimum torque to rear wheels.

NOTE: Light tight-corner braking symptom may occur depending on driving condition. This is not malfunction.

AWD SYSTEM : Fail-Safe

If any malfunction occurs in AWD electrical system, and control unit detects the malfunction, AWD warning on information display (combination meter) is displayed to indicate system malfunction. And then AWD control unit controls becomes the fail-safe mode depending on DTC.

AWD SYSTEM : Protection Function

AWD system activates its protection function (shuts down AWD system temporarily) if AWD system detects high load continuously or the front wheel tire size differs from the rear tire size. (AWD system is automatically restored if AWD system no longer detects any overload or the tire size difference is eliminated.)

NOTE:

•  If the AWD warning displays during driving but remains not displayed after the engine is restarted, the systemis normal. If it again displays after driving for some time, vehicle must be inspected.
•  When there is a difference of revolution speed between the front and rear wheel the shift occasionally changes to direct 4-wheel driving conditions automatically. This is not a malfunction.

INFORMATION DISPLAY (COMBINATION METER)

INFORMATION DISPLAY (COMBINATION METER) : AWD Warning

DESIGN/PURPOSE

AWD warning is displayed when the AWD system has a malfunction. AWD warning indicates that the vehicle is in fail-safe mode or protection function mode.

SYNCHRONIZATION WITH MASTER WARNING LAMP

Applicable

For master warning lamp, refer to DLN-17, "WARNING/INDICATOR/CHIME LIST : Warning/Indicator (On Information Display)".

SYSTEM DIAGRAM

SIGNAL PATH

•  The AWD control unit judges and decides a mode from among normal mode, fail-safe mode, and protection function mode, according to signals received from each switch, sensor, and control unit.
• The AWD control unit transmits AWD warning signal to the combination meter via CAN communication when judging fail-safe mode or protection function mode.
•  The combination meter displays AWD warning on the information display when receiving AWD warning signal transmitted from the AWD control unit.

WARNING CONDITION

AWD warning is displayed when the AWD system goes into fail-safe mode or protection function mode.

WARNING CANCEL CONDITION

When any of the conditions listed below is satisfied:

•  Ignition switch is in a position other than ON.
•  AWD warning becomes invisible when the AWD system returns to normal.

WARNING/INDICATOR/CHIME LIST

WARNING/INDICATOR/CHIME LIST : Warning/Indicator (On Information Display)

DIAGNOSIS SYSTEM (AWD CONTROL UNIT)

CONSULT Function

APPLICATION ITEMS

CONSULT can display each diagnostic item using the diagnostic test modes as follows.

*: The following diagnosis information is erased by erasing.

•  DTC
•  Freeze frame data (FFD)

ECU IDENTIFICATION

AWD control unit part number can be read.

SELF DIAGNOSTIC RESULT

Refer to DLN-23, "DTC Index".

When “PRSNT” is displayed on self-diagnosis result.

•  The system is presently malfunctioning.

When “PAST” is displayed on self-diagnosis result.

•  System malfunction in the past is detected, but the system is presently normal.

FREEZE FRAME DATA (FFD)

The following vehicle status is recorded when DTC is detected and is displayed.

DATA MONITOR

NOTE: The following table includes information (items) inapplicable to this vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

ACTIVE TEST

Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT to check operation of actuator.

CAUTION: Never energize continuously for a long time.

WORK SUPPORT

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