Nissan Qashqai (2007-2010). Manual — part 756
EPS CONTROL UNIT
STC-23
< ECU DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
DTC
Items (CONSULT screen terms)
Reference
C1601
BATTERY VOLT
C1604
TORQUE SENSOR
C1606
EPS MOTOR
C1607
EEPROM
C1608
CONTROL UNIT
U1200
CAN VHCL SPEED (ABS)
U14FF
CAN VHCL SPEED (METER)
U1000
CAN COMM CIRCUIT
STC-24
< SYMPTOM DIAGNOSIS >
EPS WARNING LAMP DOES NOT TURN ON
SYMPTOM DIAGNOSIS
EPS WARNING LAMP DOES NOT TURN ON
Diagnosis Procedure
INFOID:0000000000940534
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.
NO
>> GO TO 2.
2.
CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3.
CHECK COMBINATION METER SELF-DIAGNOSIS RESULTS
Perform combination meter self-diagnosis. Refer to
MWI-23, "CONSULT-III Function (METER/M&A)"
is self-diagnosis results indicated?
YES
>> Repair or replace malfunctioning components.
NO
>> GO TO 4.
4.
SYMPTOM CHECK
Check again.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace combination meter.
EPS WARNING LAMP DOES NOT TURN OFF
STC-25
< SYMPTOM DIAGNOSIS >
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:0000000000940536
1.
CHECK SELF-DIAGNOSIS 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 terminals and ground.
5.
Turn ignition switch OFF.
6.
Check voltage between EPS control unit harness connector terminals and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning components.
3.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1.
Check continuity between EPS control unit harness connector terminal and ground.
2.
Connect EPS control unit harness connector.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK EPS CONTROL UNIT PIN TERMINAL
Check EPS control unit pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK COMBINATION METER SELF-DIAGNOSIS RESULTS
Perform combination meter self-diagnosis. Refer to
MWI-23, "CONSULT-III Function (METER/M&A)"
is self-diagnosis results indicated?
YES
>> Repair or replace malfunctioning components.
EPS control unit
—
Voltage
Connector
Terminal
M38
1
Ground
Battery voltage
M37
10
EPS control unit
—
Voltage
Connector
Terminal
M38
1
Ground
Battery voltage
M37
10
Approx. 0 V
EPS control unit
—
Continuity
Connector
Terminal
M38
2
Ground
Existed
STC-26
< SYMPTOM DIAGNOSIS >
EPS WARNING LAMP DOES NOT TURN OFF
NO
>> GO TO 6.
6.
CHECK VEHICLE SPEED SIGNAL FROM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit).
• Without ESP models:
BRC-17, "CONSULT-III Function (ABS)"
• With ESP models:
BRC-96, "CONSULT-III Function (ABS)"
Is any malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 7.
7.
CHECK ENGINE STATUS SIGNAL
Perform self-diagnosis with ECM.
• HR16DE (with EURO-OBD):
EC-100, "CONSULT-III Function"
.
• HR16DE (Without EURO-OBD):
EC-430, "CONSULT-III Function"
EC-719, "CONSULT-III Function"
.
• MR20DE (without EURO-OBD):
EC-1054, "CONSULT-III Function"
EC-1315, "Diagnosis Description"
Is the malfunction detected by self-diagnosis?
YES
>> Check the malfunctioning system.
NO
>> GO TO 8.
8.
SYMPTOM CHECK
Check again.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace combination meter. Refer to
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