Nissan X-Trail 32. Manual - part 1995

STC-30

< DTC/CIRCUIT DIAGNOSIS >

C1604 TORQUE SENSOR

C1604 TORQUE SENSOR

DTC Description

INFOID:0000000010688418

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector
• Torque sensor
• EPS control unit (steering column assembly)

FAIL-SAFE

EPS system enters into a manual steering state.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is DTC “C1604” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-30, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010688419

1.

CHECK TERMINALS AND HARNESS CONNECTORS

Check EPS control unit (steering column assembly) pin terminals for damage or loose connection with har-
ness connector.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Erase self-diagnostic results for “EPS/DAST 3”.

3.

Turn the ignition switch OFF, and then wait 10 seconds and more.

4.

Perform self-diagnosis for “EPS/DAST 3”.

Is DTC “C1604” detected?

YES

>> Replace steering column assembly. Refer to 

ST-13, "Removal and Installation"

.

NO

>> Check pin terminal and connection of each harness connector for malfunctioning conditions.

DTC

Display item

(Trouble diagnosis content)

Malfunction detected condition

C1604

TORQUE SENSOR
(Torque sensor)

When torque sensor output signal is malfunctioning.

C1606 EPS MOTOR

STC-31

< DTC/CIRCUIT DIAGNOSIS >

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C1606 EPS MOTOR

DTC Description

INFOID:0000000010688420

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector
• EPS motor (steering column assembly)
• EPS control unit (steering column assembly)

FAIL-SAFE

EPS system enters into a manual steering state.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is DTC “C1606” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-31, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010688421

1.

CHECK TERMINALS AND HARNESS CONNECTORS

Check EPS control unit (steering column assembly) pin terminals for damage or loose connection with har-
ness connector.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Erase self-diagnostic results for “EPS/DAST 3”.

3.

Turn the ignition switch OFF, and then wait 10 seconds and more.

4.

Perform self-diagnosis for “EPS/DAST 3”.

Is DTC “C1606” detected?

YES

>> Replace steering column assembly. Refer to 

ST-13, "Removal and Installation"

.

NO

>> Check pin terminal and connection of each harness connector for malfunctioning conditions.

DTC

Display item

(Trouble diagnosis content)

Malfunction detected condition

C1606

EPS MOTOR
(EPS motor)

When the motor driver malfunction of EPS control unit or EPS motor 
malfunction is detected.

STC-32

< DTC/CIRCUIT DIAGNOSIS >

C1607, C1608 EPS CONTROL UNIT

C1607, C1608 EPS CONTROL UNIT

DTC Description

INFOID:0000000010688422

DTC DETECTION LOGIC

POSSIBLE CAUSE

EPS control unit (steering column assembly)

FAIL-SAFE

EPS system enters into a manual steering state.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is DTC “C1607” or “C1608” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-32, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010688423

1.

CHECK TERMINALS AND HARNESS CONNECTORS

Check EPS control unit (steering column assembly) pin terminals for damage or loose connection with har-
ness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Erase self-diagnostic results for “EPS/DAST 3”.

3.

Turn the ignition switch OFF, and then wait 10 seconds and more.

4.

Perform self-diagnosis for “EPS/DAST 3”.

Is DTC “C1607” or “C1608” detected?

YES

>> Replace steering column assembly. Refer to 

ST-13, "Removal and Installation"

.

NO

>> Check pin terminal and connection of each harness connector for malfunctioning conditions.

DTC

Display item

(Trouble diagnosis content)

Malfunction detected condition

C1607

EEPROM
(EEPROM)

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

C1608

CONTROL UNIT
(EPS control unit)

When the internal malfunction is detected in EPS control unit.

C1609 VEHICLE SPEED SIGNAL

STC-33

< DTC/CIRCUIT DIAGNOSIS >

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C1609 VEHICLE SPEED SIGNAL

DTC Description

INFOID:0000000010688424

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector

(CAN communication line)

• EPS control unit (steering column assembly)
• ABS malfunction 
• Vehicle speed signal error

FAIL-SAFE

EPS system enters into a constant steering assist level state.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “EPS/DAST 3” self-diagnosis.

Is DTC “C1609” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

STC-33, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010688425

1.

PERFORM ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform “ABS” self-diagnosis. 

Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-84, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Erase self-diagnostic results for “EPS/DAST 3”.

3.

Turn the ignition switch OFF, and then wait 10 seconds and more.

4.

Perform self-diagnosis for “EPS/DAST 3”.

Is DTC “C1609” detected?

YES

>> Replace steering column assembly. Refer to 

ST-13, "Removal and Installation"

.

NO

>> Check pin terminal and connection of each harness connector for malfunctioning conditions.

DTC

Display item

(Trouble diagnosis content)

Malfunction detected condition

C1609

CAN VHCL SPEED
(CAN vehicle speed signal)

• A malfunction is detected in the vehicle speed signal received with 

CAN communication.