4WD Shift Indicator Lamp Keeps Flashing

4WD Shift Indicator Lamp Keeps Flashing

Description

The 4WD shift indicator lamp keeps flashing.

Diagnosis Procedure

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 [P1814 Wait Detection Switch] P1814.

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 [P1810 4 LO Switch] P1810.

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 [Transfer Control Unit: Reference Value] Pinout Values and Diagnostic Parameters.

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 [Transfer Assembly: Disassembly and Assembly] Transfer Assembly.
2 Check transfer inner parts.

Are the inspection results normal?
YES
Inspection End.
NO
Repair or replace damaged parts.