Nissan Quest E52. Manual - part 1186

HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP DOES 

NOT TURN OFF

STC-33

< SYMPTOM DIAGNOSIS >

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HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP
DOES NOT TURN OFF

Description

INFOID:0000000009650885

Hydraulic pump electric power steering warning lamp does not turn OFF several seconds after engine started

Diagnosis Procedure

INFOID:0000000009650886

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

Perform “EPS” self-diagnosis.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

STC-14, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING LAMP

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

STC-31,

"Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

POWER STEERING CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT

Perform the trouble diagnosis of power steering control module power supply and ground. Refer to 

STC-21,

"Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Check that the pin terminals and the connection of each connector are normal.

NO

>> Repair or replace error-detected parts.

STC-34

< SYMPTOM DIAGNOSIS >

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

Diagnosis Procedure

INFOID:0000000009650887

1.

PERFORM SELF-DIAGNOSIS

With CONSULT

Perform “EPS” self-diagnosis.
Is a malfunctioning system displayed?

YES

>> Check malfunctioning system. Refer to 

STC-14, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (1)

With CONSULT

1.

Start the engine.

CAUTION:

Never drive the vehicle.

2.

Turn the steering wheel until it stops.

3.

Select “MTR ASSIST” in “DATA MONITOR” in “EPS”.

Is the display value “100%”?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (2)

With CONSULT

1.

Select “C/U TEMP” and “C/U TEMP A” in “DATA MONITOR” in “EPS”.

2.

Stop the system until the DATA MONITOR display value drops to “90

°

C (194

°

F)” or less.

3.

Check whether symptom continues.

Did symptom continue?

YES

>> GO TO 4.

NO

>> This occurs because the protection function lowers the assist force. It is not a system malfunction.

INSPECTION END

4.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (3)

With CONSULT

1.

Turn the steering wheel to the straight-ahead position. (There is no steering force)

2.

Select “BATTERY VOLT” in “DATA MONITOR” in “EPS”.

Is the display value “10.5 V” or more?

YES

>> GO TO 5.

NO

>> Check the battery power system. Refer to 

STC-21, "Diagnosis Procedure"

.

5.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (4)

With CONSULT

Select “ESTM VHCL SPD” in “DATA MONITOR” in “EPS”.

*: This may not agree with the speedometer indication immediately after the ignition switch is turned ON. This
is not a malfunction.
Is the check result normal?

YES

>> GO TO 6.

NO

>> Check the combination meter, ABS actuator and electric unit (control unit). Refer to 

MWI-35,

"CONSULT Function"

 and 

BRC-30, "CONSULT Function"

.

Monitor item

Test condition

Display value

ESTM VHCL SPD 

When stopped

0.00 km/h or mph

While driving

Approximately equal to the in-

dication on speedometer

*

(Inside of 

±

10%)

STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT

STC-35

< SYMPTOM DIAGNOSIS >

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6.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (5)

With CONSULT

Select “STR ANG SPD” in “DATA MONITOR” in “EPS”.

Is the check result normal?

YES

>> GO TO 7.

NO

>> Check the steering angle sensor. Refer to 

STC-20, "Diagnosis Procedure"

.

7.

CHECK THE POWER STEERING CONTROL MODULE SIGNAL (6)

With CONSULT

Select “ENGINE STATUS” in “DATA MONITOR” in “EPS”.

Is the display value “RUN”?

YES

>> GO TO 8.

NO

>> Check the ECM. Refer to 

EC-69, "CONSULT Function"

.

8.

CHECK THE STEERING FORCE

Check the steering force. Refer to 

ST-6, "Inspection"

.

Is the check result normal?

YES

>> INSPECTION END

NO

>> It is possible that there is a mechanical malfunction. Check the steering system. Refer to 

ST-30,

"Inspection"

.

Monitor item

Test condition

Display value

STR ANG SPD 

The steering wheel is not 
steered.

Approx. 0.0 deg/s

The steering wheel is steered.

Displays steering angle speed 
(deg/s)

STC-36

< SYMPTOM DIAGNOSIS >

UNBALANCE STEERING WHEEL TURNING FORCE AND RETURN BETWEEN 

RIGHT AND LEFT

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

Diagnosis Procedure

INFOID:0000000009650888

1.

CHECK THE ILLUMINATION OF THE HYDRAULIC PUMP ELECTRIC POWER STEERING WARNING

LAMP

Check the hydraulic pump electric power steering warning lamp while engine is running.
Does the hydraulic pump electric power steering warning lamp turn OFF?

YES

>> GO TO 2.

NO

>> Refer to 

STC-33, "Diagnosis Procedure"

.

2.

CHECK WHEEL ALIGNMENT

Check the wheel alignment. Refer to 

FSU-7, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Adjustment of wheel alignment. Refer to 

FSU-7, "Adjustment"

.

3.

CHECK STEERING WHEEL TURNING FORCE

Check the steering wheel turning force. Refer to 

ST-6, "Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

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

ST-30, "Inspection"

.