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Nissan Quest E52. Manual - part 1187
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
STC-37
< SYMPTOM DIAGNOSIS >
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UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)
Diagnosis Procedure
INFOID:0000000009650889
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 in “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.
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%)