Nissan Qashqai J11. Manual - part 995

STC-40

< SYMPTOM DIAGNOSIS >

POWER STEERING WARNING LAMP DOSE NOT TURN OFF

POWER STEERING WARNING LAMP DOSE NOT TURN OFF

Description

INFOID:0000000010452136

Power steering warning lamp does not turn OFF several seconds after engine started.

Diagnosis Procedure

INFOID:0000000010452137

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

STC-19, "DTC Index"

. 

NO

>> GO TO 2.

2.

CHECK POWER STEERING WARNING LAMP

Perform the trouble diagnosis of power steering warning lamp. Refer to 

STC-38, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the specific malfunctioning part.

3.

CHECK EPS CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis of EPS control unit power supply and ground. Refer to 

STC-25, "Diagnosis Pro-

cedure"

.

Is the inspection result normal?

YES

>> Check that there is no malfunction in each harness connector pin terminal or disconnection.

NO

>> Repair or replace the specific malfunctioning part.

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

STC-41

< SYMPTOM DIAGNOSIS >

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STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

Description

INFOID:0000000010452138

Steering wheel turning force is heavy or light.

Diagnosis Procedure

INFOID:0000000010452139

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

STC-19, "DTC Index"

. 

NO

>> GO TO 2.

2.

CHECK THE ILLUMINATION OF THE POWER STEERING WARNING LAMP

Check that the power steering warning lamp turns ON when ignition switch turns ON. Then, power steering
warning lamp turns OFF after the engine is started.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble diagnosis of power steering warning lamp. Refer to 

STC-38, "Diagnosis Proce-

dure"

.

3.

CHECK EPS CONTROL UNIT SIGNAL (1)

With CONSULT

1.

Start the engine.

CAUTION:

Never drive the vehicle.

2.

Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS/DAST 3”.

Dose the item in “DATA MONITOR” indicate “100%”?

YES

>> GO TO 6.

NO

>> GO TO 4.

4.

CHECK EPS CONTROL UNIT SIGNAL (2)

With CONSULT

Select “BATTERY VOLT” in “DATA MONITOR” in “EPS/DAST 3”.

Dose the item in “DATA MONITOR” indicate “10.5 V” or more?

YES

>> GO TO 5.

NO

>> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to 

STC-25, "Diag-

nosis Procedure"

.

5.

CHECK EPS CONTROL UNIT SIGNAL (3)

With CONSULT

1.

Select “ASSIST LEVEL” in “DATA MONITOR” in “EPS/DAST 3”.

2.

Stop the EPS system until the item in “DATA MONITOR” becomes “100%”.
NOTE:
While stopping the EPS system, do not turn steering wheel.

3.

Check that the symptom continues.

Dose the symptom continue?

YES

>> GO TO 6.

NO

>> The assist torque decreases because of protection function. This is not malfunction. INSPEC-

TION END

6.

CHECK EPS CONTROL UNIT SIGNAL (4)

With CONSULT

1.

Start the engine.

STC-42

< SYMPTOM DIAGNOSIS >

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

CAUTION:

Never drive the vehicle.

2.

Turn steering wheel from full left stop to full right stop.

3.

Select “TORQUE SENSOR” in “DATA MONITOR” in “EPS/DAST 3”.

Is the inspection result normal?

YES-1 (Models without Stop/Start System)>>GO TO 9.
YES-2 (Models with Stop/Start System)>>GO TO 8.
NO

>> GO TO 7.

7.

CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to 

STC-29, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace the specific malfunctioning part.

8.

CHECK STOP/START SYSTEM

With CONSULT

1.

Start the engine.

CAUTION:

Never drive the vehicle.

2.

Select “ST TORQUE STATUS” and “STOP/START SYSTEM” in “DATA MONITOR” in “EPS/DAST 3”.

3.

Operate stop/start system. Refer to 

ECH-35, "STOP/START SYSTEM : System Description"

 (HRA2DDT),

ECK-39, "STOP/START SYSTEM : System Description"

 (K9K), 

EC9-42, "STOP/START SYSTEM : Sys-

tem Description (M/T models)"

 (R9M) or 

EC9-50, "STOP/START SYSTEM : System Description (CVT

models)"

 (R9M).

4.

Turn the steering wheel.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Check the ECM. Refer to 

ECH-49, "CONSULT Function"

 (HRA2DDT), 

ECK-52, "CONSULT Func-

tion"

 (K9K), 

EC9-63, "CONSULT Function"

 (R9M).

9.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to 

ST-7, "Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Check the steering wheel turning force for mechanical malfunction. Refer to 

ST-14, "Inspection"

.

Monitor item 

Condition

Display value

TORQUE SENSOR

Steering wheel: Not steer-
ing (There is no steering 
force)

Approx. 0.0 Nm

Steering wheel: Right turn

Positive value (Nm)

Steering wheel: Left turn

Negative value (Nm)

Monitor item 

Condition

Display value

ST TORQUE STA-
TUS

Steering wheel: Not steering (There is 
no steering force)

Off

STOP/START SYS-
TEM

When stop/start system is active

On

Monitor item 

Condition

Display value

ST TORQUE STA-
TUS

Steering wheel: Right or left turn

On

STOP/START SYS-
TEM

When stop/start system is prohibited

Off

UNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BETWEEN 

RIGHT AND LEFT

STC-43

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UNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BE-
TWEEN RIGHT AND LEFT

Description

INFOID:0000000010452140

Unbalance steering wheel turning force and return between right and left.

Diagnosis Procedure

INFOID:0000000010452141

1.

CHECK THE ILLUMINATION OF THE POWER STEERING WARNING LAMP

Check the power steering warning lamp while engine is running.

Does the power steering warning lamp turn OFF?

YES

>> GO TO 2.

NO

>> Refer to 

STC-40, "Diagnosis Procedure"

.

2.

CHECK WHEEL ALIGNMENT

Check the wheel alignment. Refer to 

FSU-7, "Wheel Alignment Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjustment of wheel alignment. Refer to 

FSU-7, "Wheel Alignment Inspection"

.

3.

CHECK EPS CONTROL UNIT SIGNAL

With CONSULT

1.

Start the engine.

CAUTION:

Never drive the vehicle.

2.

Turn steering wheel from full left stop to full right stop.

3.

Select “DATA MONITOR” of “EPS/DAST 3” and select “TORQUE SENSOR”.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK EPS MOTOR

Perform the trouble diagnosis of EPS motor. Refer to 

STC-29, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace the specific malfunctioning part.

5.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to 

ST-7, "Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Check the steering wheel turning force for mechanical malfunction. Refer to 

ST-14, "Inspection"

.

Monitor item 

Condition

Display value

TORQUE SENSOR

Steering wheel: Not steer-
ing (There is no steering 
force)

Approx. 0.0 Nm

Steering wheel: Right turn

Positive value (Nm)

Steering wheel: Left turn

Negative value (Nm)