Nissan Tiida C11. Manual — part 1227
EPS WARNING LAMP DOES NOT TURN OFF
STC-31
< SYMPTOM DIAGNOSIS >
[EPS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
EPS WARNING LAMP DOES NOT TURN OFF
Diagnosis Procedure
INFOID:0000000001697734
SYMPTOM:
EPS warning lamp does not turn OFF for several seconds after starting the engine.
DIAGNOSTIC PROCEDURE
1.
CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to
STC-7, "CONSULT-III Function (EPS)"
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 2.
2.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Turn ignition switch ON. (Do not start engine.)
4.
Check voltage between EPS control unit harness connector
M53 (A) terminal 10 and M54 (B) terminal 17 and ground.
5.
Turn ignition switch OFF.
6.
Check voltage between EPS control unit harness connector
M53 (A) terminal 10 and M54 (B) terminal 17 and ground.
7.
Connect EPS control unit harness connector.
OK or NG
OK
>> GO TO 3.
NG
>>
Check the following. If any items are damaged, repair
or replace damaged parts.
• 60 A fusible link (letter m , located in the fuse and fusible link box).
• 10 A fuse [No. 2, located in the fuse block (J/B)].
• Harness for short or open between battery and EPS control unit harness connector M54 termi-
nal 17.
• Harness for short or open between ignition switch and EPS control unit harness connector M53
terminal 10.
3.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
Connector
Terminal
Voltage
(A) M53
10 – Ground
Battery voltage
(B) M54
17 – Ground
Battery voltage
AWGIA0031ZZ
Connector
Terminal
Voltage
(A) M53
10 – Ground
Approx. 0 V
(B) M54
17 – Ground
Battery voltage
AWGIA0028ZZ
STC-32
< SYMPTOM DIAGNOSIS >
[EPS]
EPS WARNING LAMP DOES NOT TURN OFF
3.
Check continuity between EPS control unit harness connector
M54 terminal 18 and ground.
Also check harness for short to power.
4.
Connect EPS control unit harness connector.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
4.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
STC-22, "EPS Control Unit Input/Output Signal Reference
OK or NG
OK
>> GO TO 5.
NG
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
5.
SYMPTOM CHECK
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> Replace combination meter. Refer to
MWI-94, "Removal and Installation"
Connector
Terminal
Continuity
M54
18
YES
AWGIA0029ZZ
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
STC-33
< SYMPTOM DIAGNOSIS >
[EPS]
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
STEERING WHEEL TURNING FORCE IS HEAVY OR LIGHT
Diagnosis Procedure
INFOID:0000000001697735
SYMPTOM:
Steering wheel turning force is heavy or light, while driving.
DIAGNOSTIC PROCEDURE
1.
CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to
STC-7, "CONSULT-III Function (EPS)"
Is the “CAN COMM CIRCUIT [U1000]” displayed?
YES
>> Perform trouble diagnosis for CAN communication line. Refer to
NO
>> GO TO 2.
2.
CHECK VEHICLE SPEED SIGNAL
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to
(with ABS) or
BRC-105, "CONSULT-III Function (ABS)"
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 3.
3.
CHECK COMBINATION METER SIGNAL
Perform self-diagnosis with combination meter. Refer to
MWI-22, "CONSULT-III Function (METER/M&A)"
.
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 4.
4.
CHECK ENGINE STATUS SIGNAL
Perform self-diagnosis for ECM. Refer to
EC-107, "CONSULT-III Function"
(HR16DE with EURO-OBD),
EC-772, "CONSULT-III Function"
(MR18DE),
EC-1104, "Diagnosis Description"
(K9K).
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 5.
5.
CHECK EPS MOTOR SYSTEM
Perform trouble diagnosis for EPS motor. Refer to
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
STC-22, "EPS Control Unit Input/Output Signal Reference
OK or NG
OK
>> GO TO 7.
NG
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
7.
SYMPTOM CHECK
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
ST-6, "On-Vehicle Inspection and Service"
.
STC-34
< SYMPTOM DIAGNOSIS >
[EPS]
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:0000000001697736
SYMPTOM:
Unbalance steering wheel turning force and return between right and left, while driving.
DIAGNOSTIC PROCEDURE
1.
CHECK EPS WARNING LAMP
Confirm EPS warning lamp during engine running.
Does EPS warning lamp turn OFF?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK WHEEL ALIGNMENT
Check wheel alignment. Refer to
FSU-6, "Wheel Alignment Inspection"
.
OK or NG
OK
>> GO TO 3.
NG
>> Adjust wheel alignment. Refer to
FSU-6, "Wheel Alignment Inspection"
.
3.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
STC-22, "EPS Control Unit Input/Output Signal Reference
OK or NG
OK
>> GO TO 4.
NG
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4.
SYMPTOM CHECK
Check again.
OK or NG
OK
>> INSPECTION END
NG
>> Check the steering wheel turning force because there may be mechanical malfunction. Refer to
ST-6, "On-Vehicle Inspection and Service"
.
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