Nissan Qashqai J11. Manual - part 774

DLN-12

< SYSTEM DESCRIPTION >

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COMPONENT PARTS

4WD Control Unit

INFOID:0000000010755225

• Controls driving force distribution by signals from each sensor from front wheel driving mode (100:0) to 4-

wheel driving mode (50:50).

• Fail-safe mode is available if malfunction is detected in 4WD system. For fail-safe, refer to 

DLN-17, "4WD

SYSTEM : Fail-Safe"

.

4WD ACTUATOR RELAY

4WD actuator relay is integrated with 4WD control unit, and supplies 4WD solenoid with voltage. 

Electric Controlled Coupling

INFOID:0000000010755226

Electric controlled coupling is integrated with rear final drive and transmits driving force to rear final drive. For
operation, refer to 

DLN-13, "Operation Description"

.

4WD Solenoid

INFOID:0000000010755227

• 4WD solenoid is integrated with electric controlled coupling.
• Controls electric controlled coupling by command current from 4WD control unit.

4WD Mode Switch

INFOID:0000000010755228

4WD mode is selectable among 2WD mode, AUTO mode, and LOCK mode by operating the 4WD mode
switch while the engine is running.

ABS actuator and electric unit (con-
trol unit)

Mainly transmits the following signals to 4WD control unit via CAN communication.
• Each wheel speed signal
• Decel G sensor signal
• Side G sensor signal
• Yaw rate sensor signal
For detailed installation location, refer to 

BRC-8, "Component Parts Location"

 or 

BRC-

148, "Component Parts Location"

.

4WD mode switch

Refer to 

DLN-12, "4WD Mode Switch"

.

4WD control unit
• 4WD actuator relay

Refer to 

DLN-12, "4WD Control Unit"

.

Electric controlled coupling

Refer to 

DLN-12, "Electric Controlled Coupling"

.

4WD solenoid

Refer to 

DLN-12, "4WD Solenoid"

.

No.

Component

Function

STRUCTURE AND OPERATION

DLN-13

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STRUCTURE AND OPERATION

Sectional View

INFOID:0000000010755229

Operation Description

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POWER TRANSFER DIAGRAM

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)

JSDIA3966ZZ

DLN-14

< SYSTEM DESCRIPTION >

[TRANSFER: TY21C]

STRUCTURE AND OPERATION

ELECTRIC CONTROLLED COUPLING

1.

The 4WD control unit supplies command current to electric con-
trolled coupling (4WD 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 accord-

ing to command current.

Engine

Transaxle

Transfer

Propeller shaft

Electric controlled coupling

Rear final drive

JSDIA0961ZZ

JSDIA0972GB

SDIA1844E

SYSTEM

DLN-15

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SYSTEM

4WD SYSTEM

4WD SYSTEM : System Description

INFOID:0000000010755231

• Pressing force of multiple disc clutch is controlled by electric control. Driving torque distribution of front and

rear wheels changes automatically between approximately 100 : 0 (2WD) and 50 : 50 (4WD) to have an opti-
mized torque distribution adapted to road condition change.

• Driving mode is selectable among 2WD mode, AUTO mode, and LOCK mode by operating the 4WD mode

switch.

• In accordance with fail-safe function, when system is malfunctioning, 4WD control stops, and the system

becomes 2WD or slight 4WD (rear-wheels still have some driving torque). Refer to 

DLN-17, "4WD SYSTEM

: Fail-Safe"

.

• When a high load status continues for electric controlled coupling, 4WD control temporarily becomes front

wheel drive, according to protection function. Refer to 

DLN-18, "4WD SYSTEM : Protection Function"

.

SYSTEM DIAGRAM

Signal with Communication Line

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

JSDIA6026GB

Component parts

Signal item

Combination meter

Mainly transmits the following signals to 4WD control unit via CAN communication.
• Parking brake switch signal
Mainly receives the following signals from 4WD control unit via CAN communication.
• 4WD warning lamp signal
• 4WD mode indicator lamp signal
• Torque distribution indicator signal

Steering angle sensor

Mainly transmits the following signals to 4WD control unit via CAN communication.
• steering angle sensor signal