Nissan Qashqai J11. Manual - part 782

DLN-44

< DTC/CIRCUIT DIAGNOSIS >

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C1209 MODE SW

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK 4WD CONTROL SWITCH GROUND CIRCUIT

Check the continuity between 4WD mode switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK 4WD CONTROL UNIT OUTPUT SIGNAL

1.

Connect 4WD control unit harness connector.

2.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

3.

Check the voltage between 4WD mode switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK TERMINALS AND HARNESS CONNECTORS

4WD control unit

4WD mode switch

Continuity

Connector

Terminal

Connector

Terminal

B5

5

M8

3

Not existed

6

Existed

8

Not existed

12

3

Existed

6

Not existed

8

Not existed

14

3

Not existed

6

Not existed

8

Existed

4WD control unit

—

Continuity

Connector

Terminal

B5

5

Ground

Not existed

12

14

4WD mode switch

—

Continuity

Connector

Terminal

M8

2

Ground

Existed

4WD mode switch

—

Voltage

Connector

Terminal

M8

3

Ground

Battery voltage

6

8

C1209 MODE SW

DLN-45

< DTC/CIRCUIT DIAGNOSIS >

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• Check 4WD control unit pin terminals for damage or loose connection with harness connector.
• Check 4WD mode switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace 4WD control unit. Refer to 

DLN-72, "Removal and Installation"

.

NO

>> Repair or replace damaged parts.

Component Inspection

INFOID:0000000010755262

1.

CHECK 4WD MODE SWITCH

1.

Turn the ignition switch OFF.

2.

Remove 4WD mode switch.

3.

Check the continuity between 4WD mode switch connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace 4WD mode switch. Refer to 

DLN-73, "Removal and Installation"

.

4WD mode switch

Condition

Continuity

Terminal

3

2

4WD mode switch: 2WD

Existed

4WD mode switch: AUTO

Not existed

4WD mode switch: LOCK
 (State of hold of LOCK position)

6

2

4WD mode switch: 2WD

Not existed

4WD mode switch: AUTO

Existed

4WD mode switch: LOCK
 (State of hold of LOCK position)

8

2

4WD mode switch: 2WD

Not existed

4WD mode switch: AUTO

4WD mode switch: LOCK
 (State of hold of LOCK position)

Existed

DLN-46

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C1210 ECM

C1210 ECM

DTC Description

INFOID:0000000010755263

DTC DETECTION LOGIC

POSSIBLE CAUSE

Malfunction of engine control system

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 the vehicle for a while.

2.

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

Is DTC “C1210” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-46, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010755264

1.

PERFORM ECM SELF-DIAGNOSIS

With CONSULT

Perform self-diagnosis for “ENGINE”.

Is any DTC detected?

YES

>> Check the DTC. Refer to 

ECM-93, "DTC Index"

 (MR20DD).

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 “C1210”

is detected, Replace 4WD control unit. Refer to 

DLN-72, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

C1210

ENGINE SIGNAL 1
(Engine signal 1)

Malfunction related to engine signal has been detected.

P1804 4WD CONTROL UNIT

DLN-47

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P1804 4WD CONTROL UNIT

DTC Description

INFOID:0000000010755265

DTC DETECTION LOGIC

POSSIBLE CAUSE

Internal malfunction of 4WD control unit.

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 ON.

2.

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

Is DTC “P1804” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-47, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-41, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010755266

1.

REPLACE 4WD CONTROL UNIT 

CAUTION:

Replace 4WD control unit when DTC “P1804” is detected simultaneously with other items.

>> Replace 4WD control unit. Refer 

DLN-72, "Removal and Installation"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P1804

CONTROL UNIT
(Control unit)

Malfunction is detected in the memory (EEPROM) system of 
4WD control unit.