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Nissan Leaf. Manual - part 1148
UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIATION)
STC-37
< SYMPTOM DIAGNOSIS >
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UNBALANCE STEERING WHEEL TURNING FORCE (TORQUE VARIA-
TION)
Description
INFOID:0000000010119218
Unbalance steering wheel turning force (torque variation).
Diagnosis Procedure
INFOID:0000000010119219
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1. Turn the power switch OFF to ON.
2. Perform ”Self-Diagnostic Result” of ”EPS” control unit.
Is any DTC detected?
YES
>> Check the DTC. Refer to
NO
>> GO TO 2.
2.
CHECK THE ILLUMINATION OF THE EPS WARNING LAMP
Check the EPS warning lamp while the vehicle is READY state.
Does the EPS warning lamp turn OFF?
YES
>> GO TO 3.
NO
>> Refer to
.
3.
CHECK STEERING COLUMN AND STEERING GEAR
Check the steering column assembly and steering gear assembly.
• Steering column assembly. Refer to
.
• Steering gear assembly. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace the specific malfunctioning part.
4.
CHECK EPS CONTROL UNIT SIGNAL (1)
With CONSULT
1. Set the vehicle to READY.
CAUTION:
Never drive the vehicle.
2. Turn steering wheel from full left stop to full right stop.
3. Select “ASSIST LEVEL” in “Data Monitor” of “EPS”.
Does the item in “Data Monitor” maintain “100%”?
YES
>> GO TO 7.
NO
>> GO TO 5.
5.
CHECK EPS CONTROL UNIT SIGNAL (2)
With CONSULT
Select “BATTERY VOLT” in “Data Monitor” of “EPS”.
Does the item in “Data Monitor” indicate “10.5 V” or more?
YES
>> GO TO 6.
NO
>> Perform trouble diagnosis of EPS control unit power supply and ground. Refer to
.
6.
CHECK EPS CONTROL UNIT SIGNAL (3)
With CONSULT
1. Select “C/U TEMP” in “Data Monitor” of “EPS”.
2. Stop the EPS system until the item in “Data Monitor” becomes “85
°C (185°F)” or less.
NOTE:
While stopping the EPS system, do not turn steering wheel.
3. Check that the symptom continues.