Nissan Titan A60. Manual - part 285

4WD SHIFT INDICATOR LAMP KEEPS FLASHING

DLN-79

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4WD SHIFT INDICATOR LAMP KEEPS FLASHING

Description

INFOID:0000000006179487

The 4WD shift indicator lamp keeps flashing.

Diagnosis Procedure

INFOID:0000000006179488

1.

CONFIRM THE SYMPTOM

1. Set 4WD shift switch to 2WD.

2. Drive the vehicle straight forward and backward keeping speed under 20 km/h (12 MPH).
Does 4WD shift indicator lamp keep flashing?

YES

>> GO TO 2.

NO

>> Inspection End.

2.

CHECK SYSTEM FOR WAIT DETECTION SWITCH

Perform trouble diagnosis for wait detection switch system. Refer to 

DLN-36, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK SYSTEM FOR 4LO SWITCH

Perform trouble diagnosis for 4LO switch. Refer to 

DLN-27, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

SYMPTOM CHECK

Check again.
Does the symptom still occur?

YES

>> GO TO 5.

NO

>> Inspection End.

5.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-55, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 6.

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.

6.

CHECK TRANSFER INNER PARTS

1. Disassemble transfer assembly. Refer to 

DLN-103, "Disassembly and Assembly"

.

2. Check transfer inner parts.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair or replace damaged parts.

DLN-80

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4WD WARNING LAMP FLASHES SLOWLY

4WD WARNING LAMP FLASHES SLOWLY

Description

INFOID:0000000006179489

The 4WD warning lamp flashes slowly while driving (1 time / 2 seconds).  The lamp continues to flash until the

ignition switch is turned OFF.

Diagnosis Procedure

INFOID:0000000006179490

1.

CHECK TIRES

Check the following.  Refer to 

WT-50, "Tire"

.

• Tire  size

• Tire wear

• Tire pressure
Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

SYMPTOM CHECK

Check again.
Does the symptom still occur?

YES

>> GO TO 3.

NO

>> Inspection End.

3.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-55, "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.

ATP SWITCH

DLN-81

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ATP SWITCH

Description

INFOID:0000000006179491

The ATP indicator does not come on when the transfer is in neutral and the A/T lever is in neutral or, the ATP

indicator stays on when the transfer case is not in neutral.

Diagnosis Procedure

INFOID:0000000006179492

Regarding Wiring Diagram information, refer to 

DLN-62, "Wiring Diagram"

.

DIAGNOSTIC PROCEDURE

1.

CHECK ATP SWITCH SIGNAL

With CONSULT-III

1. Start engine.

2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.

3. Read out the value of ATP SWITCH.

Without CONSULT-III

1. Start engine.

2. Check voltage between transfer control unit harness connector

terminal and ground.

OK or NG

OK 

>> GO TO 5.

NG

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ATP SWITCH

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

2. Disconnect transfer control unit harness connector and the ATP switch harness connector.

Condition

Display value

• Vehicle stopped
• Engine running
• A/T selector lever 

N position

• Brake pedal de-

pressed

4WD shift switch: 4H to 4LO or 4LO to 4H
(While actuator motor is operating.)

ON

Except the above

OFF

Connector

Terminal

Condition

Voltage 

(Approx.)

E142

23 - 

Ground

• Vehicle stopped
• Engine running
• A/T selector lever 

N position

• Brake pedal de-

pressed

4WD shift switch: 4H 
to 4LO or 4LO to 4H
(While actuator motor 
is operating.)

0V

Except the above

Battery 
voltage

SDIA3375E

DLN-82

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ATP SWITCH

3. Check continuity between transfer control unit harness connec-

tor E142 terminal 23 and ATP switch harness connector F55 ter-

minal 8.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

CHECK GROUND CIRCUIT

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

2. Disconnect ATP switch harness connector.

3. Check continuity between ATP switch harness connector F55

terminal 9 and ground.

Also check harness for short to power.

 OK or NG

 OK 

>> GO TO 4.

 NG

>> Repair open circuit or short to power in harness or con-

nectors.

4.

CHECK ATP SWITCH 

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

2. Remove ATP switch. Refer to 

DLN-12, "Component Parts Location"

.

3. Push and release ATP switch and check continuity between ATP

switch terminals 8 and 9.

OK or NG

OK

>> GO TO 5.

NG

>> Replace ATP switch.

5.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-55, "Reference Value"

.

OK or NG

OK

>> GO TO 6.

NG

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

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

6.

CHECK ATP WARNING LAMP

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

2. A/T selector lever N position and engage the parking brake.

3. Switch 4WD shift switch from 4H to 4LO or 4LO to 4H.
Does ATP warning lamp ON, while actuator motor is operating?

YES

>> Inspection End.

NO

>> Refer to 

DLN-77, "Diagnosis Procedure"

.

Continuity should exist.

SDIA3376E

Continuity should exist.

SDIA2394E

Terminal

Condition

Continuity

8 - 9

Push ATP switch

Yes

Release ATP switch

No

SDIA2395E