Nissan Tiida C11. Manual - part 1223

C1607 EEPROM

STC-15

< COMPONENT DIAGNOSIS >

[EPS]

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C1607 EEPROM

Description

INFOID:0000000001716742

EPS control unit incorporates a memory function.

DTC Logic

INFOID: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 Procedure

INFOID: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

EEPROM

When 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

Description

INFOID: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 Logic

INFOID: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 Procedure

INFOID:0000000001697728

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 “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 UNIT

When the internal malfunction is detected in EPS 
control unit.

• Harness or connector
• EPS control unit

Self-diagnosis results

CONTROL UNIT

C1609 CAN VHCL SPEED

STC-17

< COMPONENT DIAGNOSIS >

[EPS]

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C1609 CAN VHCL SPEED

Description

INFOID:0000000001716755

EPS control unit receives vehicle speed input from the combination meter and ABS actuator and electric unit
(control unit) through the CAN communication lines.

DTC Logic

INFOID:0000000001716756

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-17, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001697729

1.

CHECK DTC WITH COMBINATION METER

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 2.

2.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-25, "CONSULT-III

Function (ABS)"

 (with ABS) or 

BRC-105, "CONSULT-III Function (ABS)"

 (with ESP).

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 3.

3.

CHECK EPS CONTROL UNIT

Check EPS control unit input/output signal. Refer to 

STC-22, "EPS Control Unit Input/Output Signal Reference

Value"

.

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

>> Perform self-diagnosis with ABS actuator and electric unit (control unit) and combination meter.

Refer to 

BRC-25, "CONSULT-III Function (ABS)"

 (with ABS), 

BRC-105, "CONSULT-III Function

(ABS)"

 (with ESP) or 

MWI-22, "CONSULT-III Function (METER/M&A)"

.

DTC

Display item

Malfunction detected condition

Possible cause

C1609

CAN VHCL SPEED

When the malfunction is detected in vehicle speed 
signal received with CAN communication.

• Harness or connector
• CAN communication line
• EPS control unit

Self-diagnosis results

CAN VHCL SPEED

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