Infiniti QX56 (JA60). Manual - part 295

4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON

DLN-103

< SYMPTOM DIAGNOSIS >

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4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT
TURN ON

Description

INFOID:0000000005148857

4WD shift indicator lamp and 4LO indicator lamp do not turn ON for approx. 1 second when turning ignition

switch to ON.

Diagnosis Procedure

INFOID:0000000005148858

Regarding Wiring Diagram information, refer to 

DLN-89, "Wiring Diagram - ALL-MODE 4WD SYSTEM -"

.

1.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Refer to 

DLN-22, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair as necessary.

2.

CHECK COMBINATION METER POWER SUPPLY AND GROUND CIRCUITS

Refer to 

MWI-28, "COMBINATION METER : Diagnosis Procedure"

.

Are the inspection results normal?

YES 

>> GO TO 3.

NO

>> Perform repairs as necessary.

3.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Disconnect transfer control unit harness connector.

3. Check continuity between the following terminals.

-

Transfer control unit harness connector E142 (B) terminal 2 and

combination meter harness connector M24 (A) terminal 38.

-

Transfer control unit harness connector E142 (B) terminal 11

and combination meter harness connector M24 (A) terminal 29.

-

Transfer control unit harness connector E142 (B) terminal 12

and combination meter harness connector M24 (A) terminal 39.

-

Transfer control unit harness connector E142 (B) terminal 21

and combination meter harness connector M24 (A) terminal 28.

Also check harness for short to ground and short to power.

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK INDICATOR LAMP CIRCUIT

1. Connect combination meter harness connector.

2. Turn ignition switch ON.

Continuity should exist.

AWDIA0184ZZ

DLN-104

< SYMPTOM DIAGNOSIS >

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4WD SHIFT INDICATOR LAMP AND 4LO INDICATOR LAMP DO NOT TURN ON

3. Ground the following terminals using suitable wiring.

-

Transfer control unit harness connector E142 terminal 2 and

ground.

-

Transfer control unit harness connector E142 terminal 11 and

ground.

-

Transfer control unit harness connector E142 terminal 12 and

ground.

-

Transfer control unit harness connector E142 terminal 21 and

ground.

Do indicator lamps turn on?

YES

>> GO TO 5.

NO

>> Replace combination meter. Refer to 

MWI-100,

"Removal and Installation"

.

5.

SYMPTOM CHECK

Check again.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> GO TO 6.

6.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-81, "Reference Value"

.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

SDIA2772E

4WD WARNING LAMP DOES NOT TURN ON

DLN-105

< SYMPTOM DIAGNOSIS >

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4WD WARNING LAMP DOES NOT TURN ON

Description

INFOID:0000000005148859

4WD warning lamp does not turn ON when turning ignition switch to ON.

Diagnosis Procedure

INFOID:0000000005148860

Regarding Wiring Diagram information, refer to 

DLN-89, "Wiring Diagram - ALL-MODE 4WD SYSTEM -"

.

1.

CHECK TRANSFER CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Refer to 

DLN-22, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair as necessary.

2.

CHECK COMBINATION METER POWER SUPPLY AND GROUND CIRCUITS

Refer to 

MWI-28, "COMBINATION METER : Diagnosis Procedure"

.

Are the inspection results normal?

YES 

>> GO TO 3.

NO

>> Perform repairs as necessary.

3.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER

1. Turn ignition switch OFF. (Stay for at least 5 seconds.)

2. Disconnect transfer control unit and combination meter harness connectors.

3. Check continuity between the following terminals.

-

Transfer control unit harness connector E142 (A) terminal 5 and

combination meter harness connector M23 (B) terminal 49.

Also check harness for short to ground and short to power.

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK INDICATOR LAMP CIRCUIT

1. Connect combination meter harness connector.

2. Turn ignition switch ON. (Do not start engine.)

3. Ground the following terminal using suitable wiring.

-

Transfer control unit harness connector E142 terminal 5 and

ground.

Does 4WD warning lamp turn on?

YES

>> GO TO 5.

NO

>> Replace combination meter.  Refer to 

MWI-100,

"Removal and Installation"

.

5.

SYMPTOM CHECK

Check again.
Are the inspection results normal?

YES

>> Inspection End.

Continuity should exist.

AWDIA0187ZZ

SDIA2774E

DLN-106

< SYMPTOM DIAGNOSIS >

[ATX14B]

4WD WARNING LAMP DOES NOT TURN ON

NO

>> GO TO 6.

6.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-81, "Reference Value"

.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.