Nissan Quest E52. Instruction — 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
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
.
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
.
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
.
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
.
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
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
.
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
8.
CHECK THE STEERING FORCE
Check the steering force. Refer to
Is the check result normal?
YES
>> INSPECTION END
NO
>> It is possible that there is a mechanical malfunction. Check the steering system. Refer to
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
.
2.
CHECK WHEEL ALIGNMENT
Check the wheel alignment. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Adjustment of wheel alignment. Refer to
3.
CHECK STEERING WHEEL TURNING FORCE
Check the steering wheel turning force. Refer to
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Check the steering wheel turning force for mechanical malfunction. Refer to
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