SYMPTOM TROUBLESHOOTING [WL-C, WE-C (AT)]

id0303c3800300

•  Verify the symptoms, and perform troubleshooting according to the appropriate number.

No.

Symptom

Description
1
No RFW operation
•  Motor component (position sensor) malfunction
•  Motor component (shift motor) malfunction
•  4x4 control module malfunction
•  4x4 switch malfunction
•  Lock solenoid valve malfunction
•  Free solenoid valve malfunction
•  RFW actuator malfunction
•  RFW control box malfunction
•  One-way check valve malfunction
•  Air leakage from vacuum hose
•  Related fuses and /or harnesses malfunction
2
4x4/4L indicator dose not illuminate
•  Instrument cluster malfunction
•  TCM malfunction
•  4x4 control module malfunction
3
No change form 4x2 to 4x4
•  Motor component (position sensor) malfunction
•  Motor component (shift motor) malfunction
•  TCM malfunction
•  4x4 control module malfunction
•  4x4 switch malfunction
•  Drive chain malfunction
4
No change form 4H to 4L
•  Motor component (position sensor) malfunction
•  Motor component (shift motor) malfunction
•  TCM malfunction
•  4x4 control module malfunction
•  4x4 switch malfunction
•  Digital TR sensor malfunction
5
Noise
•  Joint shaft bearing abrasion or damage
•  RFW hub abrasion
•  Joint shaft abrasion
•  Conventional front differential parts malfunction
•  Incorrect tire pressure
•  Improper oil level
•  Transfer bearing damaged
•  Transfer gear damaged
•  Transfer drive chain damaged
6
Oil leakage
•  RFW control box malfunction
•  Conventional front differential parts malfunction
•  Transfer case malfunction
•  Improper oil level
•  Loosened sealing bolts
•  Breather clogging
•  Improper oil seal