Problem Symptoms Table
WARNING: This page is about a different car, the 2010 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
TRANSFER SYSTEM
| Symptom | Suspected Area | See |
|---|---|---|
| Noise | Oil (Level low) | Refer to ON-VEHICLE INSPECTION |
| Oil (Wrong) | Refer to ON-VEHICLE INSPECTION | |
| Transfer faulty | Refer to DISASSEMBLY | |
| Oil leakage | Oil (Level too high) | Refer to ON-VEHICLE INSPECTION |
| Gasket (Damaged) | Refer to DISASSEMBLY | |
| Oil seal (Worn or damaged) | Refer to DISASSEMBLY | |
| O-ring (Worn or damaged) | Refer to DISASSEMBLY | |
| Switch from HIGH (H4L) to LOW (L4L) is impossible | Harness or connector | Refer to SYSTEM DIAGRAM |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer faulty | Refer to DISASSEMBLY | |
| Switch from LOW (L4L) to HIGH (H4L) is impossible | Harness or connector | Refer to SYSTEM DIAGRAM |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer faulty | Refer to DISASSEMBLY | |
| Switch from FREE (H4F) to LOCK (H4L) is impossible | Harness or connector | Refer to SYSTEM DIAGRAM |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer faulty | Refer to DISASSEMBLY | |
| Switch from LOCK (H4L) to FREE (H4F) is impossible | Harness or connector | Refer to SYSTEM DIAGRAM |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer faulty | Refer to DISASSEMBLY | |
| 4LO indicator light does not come on | Harness or connector | Refer to SYSTEM DIAGRAM |
| Combination meter | Refer to PROBLEM SYMPTOMS TABLE | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| 4LO indicator light remains on | Four wheel drive control ECU | Refer to TERMINALS OF ECU |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Combination meter | Refer to PROBLEM SYMPTOMS TABLE | |
| Center differential lock indicator light does not come on | Harness or connector | Refer to SYSTEM DIAGRAM |
| Combination meter | Refer to PROBLEM SYMPTOMS TABLE | |
| CAN communication system | Refer to DIAGNOSIS SYSTEM | |
| Four wheel drive control ECU | Refer to TERMINALS OF ECU | |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Transfer shift actuator assembly | Refer to INSPECTION | |
| Center differential lock indicator light remains on | Four wheel drive control ECU | Refer to TERMINALS OF ECU |
| Transfer position switch | Refer to ON-VEHICLE INSPECTION | |
| Combination meter | Refer to PROBLEM SYMPTOMS TABLE |