Nissan Qashqai (2007-2010). Manual — part 608

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000000972071

DETAILED FLOW

1.

INTERVIEW FROM THE CUSTOMER

Clarify customer complaints before inspection. First of all, reproduce symptoms, and understand them fully.
Ask customer about his/her complaints carefully. Check symptoms by driving vehicle with customer, if neces-
sary.

CAUTION:

Customers are not professional. Never guess easily like “maybe the customer means that...,” or
“maybe the customer mentions this symptom”.

>> GO TO 2.

2.

CHECK 4WD WARNING LAMP

Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
Is 4WD warning lamp illuminated?

YES

>> GO TO 3.

NO

>> GO TO 6.

3.

PERFORM SELF-DIAGNOSIS

With CONSULT-III

1.

Perform 4WD control unit self-diagnosis.

2.

Perform malfunction detected by self-diagnosis.

3.

Erase 4WD control unit self-diagnosis results.

>> GO TO 4.

4.

CHECK TERMINALS AND HARNESS CONNECTORS

Check pin terminals for damage or loose connection with harness connector.

>> GO TO 5.

5.

CHECK SYMPTOM REPRODUCTION

With CONSULT-III

Perform DTC reproduction procedure for the error system.

Is any error detected?

YES

>> GO TO 2.

NO

>> GO TO 6.

6.

PERFORM SYMPTOM DIAGNOSIS

Perform the symptom diagnosis for each system.
Is any malfunction present?

YES

>> GO TO 2.

NO

>> GO TO 7.

7.

FINAL CHECK

With CONSULT-III

Check input/output signal standard of 4WD control unit.

Is the input/output the standard value?

YES

>> INSPECTION END

NO

>> GO TO 2.

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< FUNCTION DIAGNOSIS >

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4WD SYSTEM

FUNCTION DIAGNOSIS

4WD SYSTEM

System Diagram

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CONTROL DIAGRAM

CROSS-SECTIONAL VIEW

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4WD SYSTEM

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M/T models

CVT models

JSDIA0206ZZ

1.

Transfer case

2.

Adapter case

3.

Ring gear shaft

4.

Ring gear

5.

Companion flange

6.

Drive pinion

JSDIA0205ZZ

1.

Transfer case

2.

Adapter case

3.

Ring gear shaft

4.

Ring gear

5.

Companion flange

6.

Drive pinion

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< FUNCTION DIAGNOSIS >

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4WD SYSTEM

System Description

INFOID:0000000000972073

DESCRIPTION

• 4WD controls distribution of drive power between front-wheel drive (100:0) and 4WD (50:50) conditions

according to signals from sensors.

• It transmits/receives each signal from the following control unit via CAN communication line.

AUTO Mode

• Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
• 4WD mode makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.
• On roads which do not require 4WD, AUTO mode contributes to improved fuel economy by driving in condi-

tions close to front-wheel drive.

• Sensor inputs determine the vehicle's turning condition, and tight cornering/braking are controlled by distrib-

uting optimum torque to rear wheels.

LOCK Mode

• Front/rear wheel torque distribution is fixed, ensuring stable driving when climbing slopes.
• Vehicle will switch automatically to AUTO mode if vehicle speed increases. If vehicle speed then decreases,

the vehicle automatically returns to direct 4-wheel driving conditions.

• LOCK mode will change to AUTO mode automatically, when the vehicle speed exceeds approx. 10 km/h (6

MPH). The LOCK indicator light keeps illuminating.

NOTE:
If there is a significant difference in pressure or wear between tires, full vehicle performance is not available.
LOCK mode may be prohibited, or speeds at which LOCK mode is enabled may be restricted detecting tire
conditions.

2WD Mode

Vehicle is in front-wheel drive.
NOTE:
If front wheels are slipping in 2WD mode, do not switch to AUTO or LOCK. This can cause difficulties for the
system.

POWER TRANSFER DIAGRAM

OPERATION PRINCIPLE

Component parts

Function

ABS actuator and electric unit (control unit)

Transmits the following signals via CAN communication to 4WD control unit.
• Vehicle speed signal
• Stop lamp switch signal (brake signal)

ECM

Transmits the following signals via CAN communication to 4WD control unit.
• Accelerator pedal position signal
• Engine speed signal

Combination meter

Transmits conditions of parking brake switch signal via CAN communication to 4WD con-
trol unit.

Steering angle sensor

Transmits conditions of steering angle sensor signal via CAN communication to 4WD
control unit.

1.

Engine

2.

Transaxle

3.

Transfer

4.

Propeller shaft

5.

Electric controlled coupling

6.

Rear final drive

JSDIA0208ZZ