4WD System Does Not Operate

4WD SYSTEM DOES NOT OPERATE


Description

The vehicle can not be put into 4WD mode. (Possible hydraulic malfunction)




4WD SYSTEM DOES NOT OPERATE


Diagnosis Procedure

1.CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. P1813.
Are the inspection results normal?
YES - GO TO 2.
NO - Repair or replace damaged parts.
2.CHECK SYSTEM FOR CLUTCH PRESSURE SWITCH
Perform trouble diagnosis for clutch pressure switch system. P1827.
Are the inspection results normal?
YES - GO TO 3.
NO - Repair or replace damaged parts.
3.SYMPTOM CHECK
Check again.
Are the inspection results normal?
YES - Inspection End.
NO - GO TO 4.
4.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Pinout Values and Diagnostic Parameters.
Are the inspection results normal?
YES - GO TO 5.
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.
5.CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Overhaul.
2. Check transfer inner parts.
Are the inspection results normal?
YES - Inspection End.
NO - Repair or replace damaged parts.