Nissan March K13. Instruction — part 636
C1601 BATTERY POWER SUPPLY
STC-19
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
C1601 BATTERY POWER SUPPLY
Description
INFOID:0000000005912720
Power is supplied from the battery to EPS control unit.
DTC Logic
INFOID:0000000005912721
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS” self-diagnosis.
Is DTC “C1601” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005912722
1.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Check continuity between EPS control unit harness connector terminal and ground.
4.
Connect EPS control unit harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
2.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (1)
1.
Check voltage between EPS control unit harness connector terminals and ground.
2.
Turn ignition switch ON.
CAUTION:
Never start the engine.
3.
Check voltage between EPS control unit harness connector and ground.
DTC
Display item
Malfunction detected condition
Possible cause
C1601
BATTERY VOLT
When a power supply voltage to the EPS control unit
is maintained at 17.5 V or more or at less than 9V
continuously for five second or more.
• Harness or connector
• EPS control unit
EPS control unit
—
Continuity
Connector
Terminal
E36
18
Ground
Existed
EPS control unit
—
Voltage
Connector
Terminal
M37
4
Ground
Approx. 0 V
STC-20
< DTC/CIRCUIT DIAGNOSIS >
C1601 BATTERY POWER SUPPLY
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (2)
1.
Turn ignition switch OFF.
2.
Check the 10A fuse (#3).
3.
Check the harness for open or short between EPS control unit harness connector No.4 terminal and the
10A fuse (#3).
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for ignition power supply circuit. Refer to
.
NO
>> Repair or replace error-detected parts.
4.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (3)
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.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (4)
1.
Turn ignition switch OFF.
2.
Check the 60A fusible link (J).
3.
Check the harness for open or short between EPS control unit harness connector No.17 terminal and the
60A fusible link (J).
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit. Refer to
NO
>> Repair or replace error-detected parts.
6.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect torque sensor harness connector.
3.
Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
Is the inspection result normal?
YES
>> Replace EPS control unit. Refer to
.
NO
>> Repair or replace error-detected parts.
EPS control unit
—
Voltage
Connector
Terminal
M37
4
Ground
Battery voltage
EPS control unit
—
Voltage
Connector
Terminal
E36
17
Ground
Battery voltage
EPS control unit
—
Voltage
Connector
Terminal
E36
17
Ground
Battery voltage
C1604 TORQUE SENSOR
STC-21
< DTC/CIRCUIT DIAGNOSIS >
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C1604 TORQUE SENSOR
DTC Logic
INFOID:0000000005912724
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
With CONSULT-III
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS” self-diagnosis.
Is DTC “C1604” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005912725
1.
CHECK TORQUE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF to ON.
CAUTION:
Never start the engine.
2.
Check voltage between torque sensor harness connector terminals and ground.
CAUTION:
Steering wheel is neutral position. (There is no steering force.)
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for battery power supply circuit. Refer to
.
2.
CHECK TORQUE SENSOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check continuity between torque sensor harness connector terminal and ground.
CAUTION:
Steering wheel is neutral position. (There is no steering force.)
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK TORQUE SENSOR SIGNAL
1.
Turn ignition switch OFF to ON.
2.
Check continuity between torque sensor harness connector terminal and ground.
CAUTION:
DTC
Display item
Malfunction detected condition
Possible cause
C1604
TORQUE SENSOR
When torque sensor output signal is malfunctioning.
• Harness or connector
• Torque sensor
• EPS control unit
Torque sensor
—
Voltage
Connector
Terminal
M327
13
Ground
Approx. 5 V
Torque sensor
—
Continuity
Connector
Terminal
M327
15
Ground
Existed
STC-22
< DTC/CIRCUIT DIAGNOSIS >
C1604 TORQUE SENSOR
Steering wheel is neutral position. (There is no steering force.)
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Torque sensor is malfunction. Replace steering column assembly. Refer to
4.
CHECK CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect torque sensor harness connector.
3.
Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
Is the inspection result normal?
YES
>> Replace EPS control unit. Refer to
.
NO
>> Repair or replace error-detected parts.
Torque sensor
—
Continuity
Connector
Terminal
M327
14
Ground
Approx. 2.5 V
16
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