Nissan X-Trail 32. Manual - part 658

C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

DLN-43

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

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C1203 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

DTC Description

INFOID:0000000010991984

DTC DETECTION LOGIC

POSSIBLE CAUSE

ABS malfunction
• Vehicle speed signal error

FAIL-SAFE

4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.

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.

Drive at 30 km/h (19 MPH) or more for approximately 1 minute.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “C1203” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-43, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010991985

1.

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

With CONSULT

Perform self-diagnosis for “ABS”.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

BRC-84, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK TERMINALS AND HARNESS CONNECTORS

Check 4WD control unit pin terminals for damage or loose connection with harness connector.

Is inspection result normal?

YES

>> After turning the ignition switch OFF, perform DTC confirmation procedure again. If DTC “C1203”

is detected, Replace 4WD control unit. Refer to 

DLN-76, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

C1203

ABS SYSTEM
(ABS system)

Malfunction related to wheel sensor has been detected by 
ABS actuator and electric unit (control unit).

DLN-44

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C1204 4WD SOLENOID

C1204 4WD SOLENOID

DTC Description

INFOID:0000000010991986

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Internal malfunction of electronic controlled coupling
• Malfunction of 4WD solenoid power supply circuit (open or short)
• Malfunction of 4WD solenoid command current

FAIL-SAFE

4WD control changes to front-wheel drive immediately, then 4WD control stops, and the vehicle becomes
front-wheel drive.

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 self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “C1204” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-44, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010991987

1.

CHECK 4WD SOLENOID POWER SUPPLY (1)

1.

Turn the ignition switch OFF.

2.

Disconnect 4WD control unit harness connector.

3.

Check the voltage between 4WD control unit harness connector and ground.

4.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

5.

Check the voltage between 4WD control unit harness connector and ground.

Is the inspection result normal?

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

C1204

4WD SOLENOID
(4WD solenoid)

Malfunction related to 4WD solenoid has been detected.

4WD control unit

—

Voltage

Connector

Terminal

B5

9

Ground

Battery voltage

4WD control unit

—

Voltage

Connector

Terminal

B5

9

Ground

Battery voltage

C1204 4WD SOLENOID

DLN-45

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK 4WD SOLENOID POWER SUPPLY (2)

1.

Turn the ignition switch OFF.

2.

Check the 10A fuse (#6).

3.

Disconnect fuse block (J/B) harness connector.

4.

Check the continuity between 4WD control unit harness connector and fuse block (J/B) harness connec-
tor.

5.

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit. Refer to 

PG-12, "Wiring Diagram - BAT-

TERY POWER SUPPLY -"

.

NO

>> Repair or replace error-detected parts.

3.

CHECK 4WD SOLENOID GROUND

Check the continuity between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK 4WD SOLENOID CIRCUIT (1)

Check the resistance between 4WD control unit harness connector.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 5.

5.

CHECK 4WD SOLENOID CIRCUIT (2)

1.

Remove 4WD solenoid harness connector.

2.

Check the continuity between 4WD control unit harness connector and 4WD solenoid harness connector.

4WD control unit

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

B5

9

M2

15B

Existed

4WD control unit

—

Continuity

Connector

Terminal

B5

9

Ground

Not existed

4WD control unit

—

Continuity

Connector

Terminal

B5

10

Ground

Existed

11

4WD control unit

 Resistance (Approx.)

Connector

Terminal

B5

1

2

2.5 

Ω

4WD control unit

4WD solenoid

Continuity

Connector

Terminal

Connector

Terminal

B5

1

C1

2

Existed

2

1

DLN-46

< DTC/CIRCUIT DIAGNOSIS >

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C1204 4WD SOLENOID

3.

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

CHECK 4WD SOLENOID

Check 4WD solenoid. Refer to 

DLN-46, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to 

DLN-231,

"Removal and Installation"

.

7.

CHECK TERMINALS AND HARNESS CONNECTORS

• Check 4WD control unit pin terminals for damage or loose connection with harness connector.
• Check 4WD solenoid pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> Replace 4WD control unit. Refer to 

DLN-76, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000010991988

1.

CHECK 4WD SOLENOID

1.

Turn the ignition switch OFF.

2.

Disconnect 4WD solenoid harness connector.

3.

Check the resistance between 4WD solenoid harness connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> 4WD solenoid is malfunctioning. Replace electric controlled coupling. Refer to 

DLN-231,

"Removal and Installation"

.

4WD control unit

—

Continuity

Connector

Terminal

B5

1

Ground

Not existed

2

4WD solenoid

 Resistance (Approx.)

Terminal

1

2

2.5 

Ω