Nissan Altima HL32 Hybrid. Manual - part 1061

C1607 EEPROM

STC-23

< COMPONENT DIAGNOSIS >

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C1607 EEPROM

Description

INFOID:0000000004212842

EEPROM is a nonvolatile memory that allows electrical writing and erasing of data to be stored. EEPROM is

built into the EPS control unit.

Diagnosis information, sensor calibration data, temperature calibration data, etc. are stored in EEPROM.

DTC Logic

INFOID:0000000004212843

DTC DETECTION LOGIC

NOTE:
C1607 may be detected also for malfunctions other than EPS system components.

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC MEMORY

 With CONSULT-III

1. Record DTC.

2. Erase DTC once.

NOTE:

After erasing DTC record, currently occurred DTC can be detected by reading out DTC again.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

 With CONSULT-III

1. Turn the ignition switch ON (READY).

2. Steer 360

° leftward and rightward slowly.

3. Return the steering wheel to the straight-ahead position.

4. Perform the self-diagnosis.
Is DTC “C1607” detected?

YES

>> Proceed to 

STC-23, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212844

1.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT-III

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

STC-23, "DTC Logic"

.

Which DTC is detected?

C1607 >> Replace EPS control unit. Refer to 

STC-58, "Removal and Installation"

.

Except C1607>>Check the malfunctioning system.

No DTC>>INSPECTION END

Special Repair Requirement

INFOID:0000000004212845

1.

INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN

Always perform EPS motor angle sensor initialization and torque sensor calibration after replacing EPS con-

trol unit or steering gear assembly. Refer to 

STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND

TORQUE SENSOR CALIBRATION : Special Repair Requirement"

.

DTC

Item

(CONSULT-III screen term)

DTC detecting condition

Possible cause

C1607

EEPROM

When the memory (EEPROM) system malfunction is 
detected in EPS control unit.

• EPS control unit

STC-24

< COMPONENT DIAGNOSIS >

C1607 EEPROM

>> END

C1608 CONTROL UNIT

STC-25

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C1608 CONTROL UNIT

Description

INFOID:0000000004212846

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.

• EPS control unit outputs optimum assist torque signal to EPS motor.

• EPS control unit reduces output signals to EPS motor and protects EPS motor and EPS control unit when

using power steering continuously and excessively.

• As a fail-safe function, turned off output signal to EPS motor and then enters a manual steering state, if mal-

function is detected in EPS system.

DTC Logic

INFOID:0000000004212847

DTC DETECTION LOGIC

NOTE:
C1608 may be detected also for malfunctions other than EPS system components.

DTC CONFIRMATION PROCEDURE

1.

ERASE DTC MEMORY

 With CONSULT-III

1. Record DTC.

2. Erase DTC once.

NOTE:

After erasing DTC record, currently occurred DTC can be detected by reading out DTC again.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION

 With CONSULT-III

1. Turn the ignition switch ON (READY).

2. Steer 360

° leftward and rightward slowly.

3. Return the steering wheel to the straight-ahead position.

4. Perform the self-diagnosis.
Is DTC “C1608” detected?

YES

>> Proceed to 

STC-25, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004212848

1.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT-III

Perform “DTC CONFIRMATION PROCEDURE” (self-diagnosis) again. Refer to 

STC-25, "DTC Logic"

.

Which DTC is detected?

C1608 >> Replace EPS control unit. Refer to 

STC-58, "Removal and Installation"

.

Except C1608>>Check the malfunctioning system.

No DTC>>INSPECTION END

Special Repair Requirement

INFOID:0000000004212849

1.

INITIALIZE EPS MOTOR ANGLE SENSOR AND CALIBRATE TORQUE SENSOR AGAIN

DTC

Item

(CONSULT-III screen term)

DTC detecting condition

Possible cause

C1608

CONTROL UNIT

When the internal malfunction is detected in EPS 
control unit.

• EPS control unit

STC-26

< COMPONENT DIAGNOSIS >

C1608 CONTROL UNIT

Always perform EPS motor angle sensor initialization and torque sensor calibration after replacing EPS con-

trol unit or steering gear assembly. Refer to 

STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND

TORQUE SENSOR CALIBRATION : Special Repair Requirement"

.

>> END