4WD Shift Indicator Lamp or 4Lo Indicator Lamp Do Not Change

4WD Shift Indicator Lamp or 4Lo Indicator Lamp Do Not Change

Description

4WD shift indicator lamp or 4LO indicator lamp do not change when switching the 4WD shift switch.

Diagnosis Procedure

1. CONFIRM THE SYMPTOM

Confirm 4WD shift indicator lamp and 4LO indicator lamp when ignition switch is turned to ON.

Do 4WD shift indicator lamp and 4LO indicator lamp turn on?
YES-1 (A/T models)
GO TO 2.
YES-2 (M/T models)
GO TO 3.
NO
ERROR! Unknown action!Go to [4WD Shift Indicator Lamp and 4Lo Indicator Lamp Do Not Turn On] 4WD Shift Indicator Lamp and 4Lo Indicator Lamp Do Not Turn On.

2. CHECK SYSTEM FOR STOP LAMP SWITCH

Perform trouble diagnosis for stop lamp switch system. Refer to [C1116 Stop Lamp Switch] C1116 (Type 1) or [C1116 Stop Lamp Switch] C1116 (Type 2).

Are the inspection results normal?
YES
GO TO 3.
NO
Repair or replace damaged parts.

3. CHECK SYSTEM FOR 4WD SHIFT SWITCH

Perform trouble diagnosis for 4WD shift switch system. Refer to [P1813 4WD Shift Switch] P1813.

Are the inspection results normal?
YES
GO TO 4.
NO
Repair or replace damaged parts.

4. 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 5.
NO
Repair or replace damaged parts.

5. CHECK SYSTEM FOR 4LO SWITCH

Perform trouble diagnosis for 4LO switch system. Refer to [P1810 4 LO Switch] P1810.

Are the inspection results normal?
YES-1 (A/T models)
GO TO 6.
YES-2 (M/T models)
GO TO 7.
NO
ERROR! Unknown action!Repair or replace damaged parts.

6. CHECK SYSTEM FOR ATP SWITCH

Perform trouble diagnosis for ATP switch system. Refer to [ATP Switch Circuit Check] Component Tests and General Diagnostics.

Are the inspection results normal?
YES
GO TO 7.
NO
Repair or replace damaged parts.

7. SYMPTOM CHECK

Check again.

Does the symptom still occur?
YES
GO TO 8.
NO
Inspection End.

8. 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 9.
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.

9. 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.