Nissan Pathfinder. Manual - part 403

DLN-54

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C1209 MODE SW

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace 4WD shift switch. Refer to 

DLN-73, "Removal and Installation"

.

2

6

4WD shift switch: AUTO

Existed

Except the above

Not existed

2

8

4WD shift switch: 4WD

Existed

Except the above

Not existed

4WD shift switch

Continuity

Terminal

Condition

C1210 ECM

DLN-55

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

C

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C1210 ECM

DTC Logic

INFOID:0000000009177743

DTC DETECTION LOGIC

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.

PERFORM DTC CONFIRMATION

 With CONSULT

1. Start the engine and drive at 30 km/h (19 MPH) or more for approximately 1 minute.

2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “C1210” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-55, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177744

1.

PERFORM ECM SELF-DIAGNOSIS

 With CONSULT

Perform self-diagnosis for “ENGINE”.
Is any DTC detected?

YES

>> Check the DTC. Refer to 

EC-91, "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 “C1210”

is detected, Replace 4WD control unit. Refer to 

DLN-72, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

C1210

ENGINE SIGNAL 1

Malfunction related to engine signal has 
been detected.

Malfunction of engine control system

DLN-56

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

P1804 4WD CONTROL UNIT

P1804 4WD CONTROL UNIT

DTC Logic

INFOID:0000000009177745

DTC DETECTION LOGIC

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.

PERFORM DTC CONFIRMATION

 With CONSULT

1. Turn the ignition switch OFF to ON.

2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P1804” detected?

YES

>> Proceed to 

DLN-56, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177746

1.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT

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

DLN-56, "DTC Logic"

.

Is DTC “P1804” detected?

YES

>> Replace 4WD control unit. Refer to 

DLN-72, "Removal and Installation"

.

NO

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

any items are damaged, repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

P1804

CONTROL UNIT 3

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

Internal malfunction of 4WD control 
module.

P181F INCOMPLETE CALIBRATION

DLN-57

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY21C]

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P181F INCOMPLETE CALIBRATION

DTC Logic

INFOID:0000000009177747

DTC DETECTION LOGIC

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.

PERFORM DTC CONFIRMATION

 With CONSULT

1. Turn the ignition switch OFF to ON.

2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC “P181F” detected?

YES

>> Proceed to 

DLN-57, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177748

1.

PERFORM WRITING UNIT CHARACTERISTICS

1. Erase self-diagnostic result for “ALL MODE AWD/4WD”.

2. Perform writing unit characteristics. Refer to 

DLN-44, "Work Procedure"

.

3. Turn the ignition switch OFF to ON.

4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is any DTC except “P181F” detected?

YES

>> Perform trouble diagnosis for detected DTC. Refer to 

DLN-23, "DTC Index"

.

NO

>> GO TO 2.

2.

PERFORM SELF-DIAGNOSIS AGAIN

 With CONSULT

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

DLN-23, "DTC Index"

.

Is DTC “P181F” detected?

YES

>> Replace 4WD control unit. Refer to 

DLN-72, "Removal and Installation"

.

NO

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

any items are damaged, repair or replace error-detected parts.

DTC

Display item

Malfunction detected condition

Possible cause

P181F

INCOMP CALIBRATION

When incomplete writing unit character-
istics of rear final drive is detected.

Writing unit characteristics is incom-
plete.