Nissan Qashqai J11. Manual — part 994
STC-36
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Description
INFOID:0000000010470627
Power supply of EPS control unit.
Diagnosis Procedure
INFOID:0000000010470628
1.
CHECK EPS CONTROL UNIT IGNITION POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Check voltage between EPS control unit harness connector terminals and ground.
4.
Turn ignition switch ON.
CAUTION:
Never start the engine.
5.
Check voltage between EPS control unit harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK EPS CONTROL UNIT IGNITION POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the 10A fuse (#4).
3.
Check continuity between EPS control unit harness connector terminal and fuse block (J/B) harness con-
nector terminal.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for ignition power supply circuit. Refer to
.
NO
>> Repair or replace error-detected parts.
3.
CHECK EPS CONTROL UNIT BATTERY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Check voltage between EPS control unit harness connector terminals and ground.
3.
Turn ignition switch ON.
CAUTION:
Never start the engine.
4.
Check voltage between EPS control unit harness connector and ground.
EPS control unit
—
Voltage
Connector
Terminal
M33
4
Ground
Approx. 0 V
EPS control unit
—
Voltage
Connector
Terminal
M33
4
Ground
10.5 – 16 V
EPS control unit
Fuse block (J/B)
Continuity
Connector
Terminal
Connector
Terminal
M33
4
M76
7B
Existed
EPS control unit
—
Voltage
Connector
Terminal
E34
9
Ground
10.5 – 16 V
POWER SUPPLY AND GROUND CIRCUIT
STC-37
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK EPS CONTROL UNIT BATTERY POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the 50A fusible link (#F).
3.
Check the 50A fusible link (#H).
4.
Check the harness for open or short between EPS control unit harness connector No.9 terminal and the
50A fusible link (#F).
5.
Check the harness for open or short between EPS control unit harness connector No.9 terminal and the
50A fusible link (#H).
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit. Refer to
NO
>> Repair or replace error-detected parts.
5.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
Check continuity between EPS control unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Check the EPS control unit pin terminals for damage or loose connection with harness connector.
3.
Check the fuse block (J/B) pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace error-detected parts.
EPS control unit
—
Voltage
Connector
Terminal
E34
9
Ground
10.5 – 16 V
EPS control unit
—
Continuity
Connector
Terminal
M34
10
Ground
Existed
STC-38
< DTC/CIRCUIT DIAGNOSIS >
POWER STEERING WARNING LAMP
POWER STEERING WARNING LAMP
Component Function Check
INFOID:0000000010452132
1.
CHECK THE ILLUMINATION OF THE POWER STEERING WARNING LAMP
Check that the power steering warning lamp turns ON when ignition switch turns ON. Then, power steering
warning lamp turns OFF after the engine is started.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Perform trouble diagnosis. Refer to
Diagnosis Procedure
INFOID:0000000010452133
1.
PERFORM SELF-DIAGNOSIS
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS/DAST 3” self-diagnosis.
Is any DTC detected?
YES
>> Check the DTC. Refer to
NO
>> GO TO 2.
2.
CHECK POWER STEERING WARNING LAMP SIGNAL
With CONSULT
1.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
2.
Select “DATA MONITOR” of “EPS/DAST 3” and select “WARNING LAMP”.
3.
Check that the item in “DATA MONITOR” is “On”.
4.
Start the engine.
CAUTION:
Never drive the vehicle.
5.
Check that the item in “DATA MONITOR” is “Off”.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for combination meter power supply circuit. Refer to
"COMBINATION METER : Diagnosis Procedure"
.
NO
>> Replace steering column assembly. Refer to
STC-46, "Removal and Installation"
.
POWER STEERING WARNING LAMP DOSE NOT TURN ON
STC-39
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
POWER STEERING WARNING LAMP DOSE NOT TURN ON
Description
INFOID:0000000010452134
Power steering warning lamp does not turn ON when turning ignition switch ON from OFF. (Check the illumi-
nation of the power steering warning lamp.)
Diagnosis Procedure
INFOID:0000000010452135
1.
CHECK POWER STEERING WARNING LAMP
Perform the trouble diagnosis of power steering warning lamp. Refer to
.
Is the inspection result normal?
YES
>> Check that there is no malfunction in each harness connector pin terminal or disconnection.
NO
>> Repair or replace the specific malfunctioning part.
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