2007 NISSAN TIIDA sensor

STC-8
< FUNCTION DIAGNOSIS >[EPS]
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
EPS CONTROL UNIT PART NUMBER
Display a part number of EPS control unit carried by a vehicle.
Monitor item (Unit) Remarks
MOTOR VOL (V) Power supply voltage for EPS control unit is displayed
TORQUE SENSOR (Nm) Steering wheel turning force detected by torque sensor is displayed
MOTOR SIG (A) Current commanded value to EPS motor is displayed
MOTOR CURRENT (A) Current value consumed by EPS motor is displayed
VEHICLE SPEED (km/h) or (mph) Vehicle speed is displayed from vehicle speed signal with CAN communication
WARNING LAMP (ON/OFF) EPS warning lamp control status is displayed
DERATING STAT (ON/OFF) Protect overload status is displayed
ENGINE STATUS (STOP/RUN) Engine speed is displayed from engine status signal with CAN communication

STC-10
< COMPONENT DIAGNOSIS >[EPS]
C1601 BATTERY POWER SUPPLY
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.
2.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
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 3.
NG >> Repair open circuit, short to ground or short to power in
harness or connectors.
3.CHECK DTC
1. Start engine.
Does EPS warning lamp turn OFF?
YES >>INSPECTION END
NO >> Perform self-diagnosis, repair or replace damaged parts. Refer to STC-7, "
CONSULT-III Function
(EPS)".
Special Repair Requirement (Models with ESP)INFOID:0000000001716734
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END
Connector Terminal Continuity
M54 18 Yes
AWGIA0029ZZ

C1604 TORQUE SENSOR
STC-11
< COMPONENT DIAGNOSIS >[EPS]
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C1604 TORQUE SENSOR
DescriptionINFOID:0000000001716736
Torque sensor detects the steering torque, and transmit the signal to EPS control unit.
DTC LogicINFOID:0000000001716737
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to STC-11, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001697725
1.CHECK TORQUE SENSOR SIGNAL
With CONSULT-III
1. Start engine.
2. Select “DATA MONITOR“ mode for “EPS” with CONSULT-III.
3. Check the value of “TORQUE SENSOR”. Refer to STC-22, "
EPS Control Unit Input/Output Signal Refer-
ence Value".
Without CONSULT-III
1. Start engine.
2. Check voltage between EPS control unit harness connector M53 terminals 4, 5, 6, 7 and ground. Refer to
STC-22, "
EPS Control Unit Input/Output Signal Reference Value".
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2.CHECK HARNESS AND CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect EPS control unit harness connector and torque sensor harness connector.
3. Check continuity between EPS control unit harness connector
M53 (A) terminals 4, 5, 6, 7 and torque sensor harness connec-
tor M63 (B) terminals 1, 2, 3, 4.
DTC Display item Malfunction detected condition Possible cause
C1604 TORQUE SENSORMalfunction of the torque sensor in steering column
assembly is detected. Harness or connector
 Torque sensor
 EPS control unit
Self-diagnosis results
TORQUE SENSOR
Terminal Continuity
4 – 3
Ye s 5 – 2
6 – 1
7 – 4
SGIA1629E

STC-12
< COMPONENT DIAGNOSIS >[EPS]
C1604 TORQUE SENSOR
Also check harness for short to ground and short to power.
4. Connect EPS control unit harness connector and torque sensor harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-22, "
EPS Control Unit Input/Output Signal Reference
Va l u e".
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.CHECK DTC
Perform the self-diagnosis, after driving the vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Torque sensor is malfunctioning. Replace steering column assembly. Refer to ST-9, "
Removal
and Installation".
Special Repair Requirement (Models with ESP)INFOID:0000000001730964
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END

STC-14
< COMPONENT DIAGNOSIS >[EPS]
C1606 EPS MOTOR
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.CHECK DTC
Perform the self-diagnosis, after driving the vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
Special Repair Requirement (Models with ESP)INFOID:0000000001730965
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END

C1607 EEPROM
STC-15
< COMPONENT DIAGNOSIS >[EPS]
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C1607 EEPROM
DescriptionINFOID:0000000001716742
EPS control unit incorporates a memory function.
DTC LogicINFOID:0000000001716743
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to STC-15, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001697727
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “EPS” with CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch OFF, and wait at least 10 seconds.
5. Start engine.
6. Perform the self-diagnosis again.
Is the
“EEPROM [C1607]” displayed?
YES >> Replace EPS control unit. Refer to ST-9, "Removal and Installation".
NO >>INSPECTION END
Special Repair Requirement (Models with ESP)INFOID:0000000001730966
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END
DTC Display item Malfunction detected condition Possible cause
C1607 EEPROMWhen the memory (EEPROM) system malfunction is
detected in EPS control unit. Harness or connector
 EPS control unit
Self-diagnosis results
EEPROM

STC-16
< COMPONENT DIAGNOSIS >[EPS]
C1608 EPS CONTROL UNIT
C1608 EPS CONTROL UNIT
DescriptionINFOID:0000000001716745
EPS control unit performs an arithmetical operation on data, such as steering wheel turning force (sensor sig-
nal) from the torque sensor, vehicle speed signal, etc. Then it generates an optimum assist torque to the EPS
motor according to the driving condition.
DTC LogicINFOID:0000000001716746
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to STC-16, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000001697728
1.PERFORM SELF-DIAGNOSIS
With CONSULT-III1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “EPS” with CONSULT-III.
3. Touch “ERASE”.
4. Turn ignition switch OFF, and wait at least 10 seconds.
5. Start engine.
6. Perform the self-diagnosis again.
Is the
“CONTROL UNIT [C1608]” displayed?
YES >> Replace EPS control unit. Refer to ST-9, "Removal and Installation".
NO >>INSPECTION END
Special Repair Requirement (Models with ESP)INFOID:0000000001730967
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END
DTC Display item Malfunction detected condition Possible cause
C1608 CONTROL UNITWhen the internal malfunction is detected in EPS
control unit. Harness or connector
 EPS control unit
Self-diagnosis results
CONTROL UNIT

STC-18
< COMPONENT DIAGNOSIS >[EPS]
C1609 CAN VHCL SPEED
Special Repair Requirement (Models with ESP)
INFOID:0000000001730968
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to BRC-90, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
tion".
>> END