Tech Tips
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.
| Symptom | Suspected Area | See page |
|---|---|---|
| Noise | Oil (Level low) | |
| Oil (Wrong) | ||
| Transfer faulty | ||
| Oil leakage | Oil (Level too high) | |
| Gasket (Damaged) | ||
| Oil seal (Worn or damaged) | ||
| O-ring (Worn or damaged) | ||
| The 4LO indicator light remains off after operating the transfer position switch (integration control and panel assembly) to L4*4 The 4LO indicator light remains off after operating the transfer position switch to L4*5, *6 |
ECU power source circuit | |
| Clutch switch circuit*1 | ||
| CAN communication system | ||
| Combination meter assembly | ||
| Transfer position switch (integration control and panel assembly) *4 Transfer position switch*5, *6 |
||
| 4 wheel drive control ECU | ||
| The 4LO indicator light remains on after operating the transfer position switch (integration control and panel assembly) to H4*4 The 4LO indicator light remains on after operating the transfer position switch to H4*5, *6 |
ECU power source circuit | |
| Clutch switch circuit*1 | ||
| CAN communication system | ||
| Combination meter assembly | ||
| Transfer position switch (integration control and panel assembly)*4 Transfer position switch*5, *6 |
||
| 4 wheel drive control ECU | ||
| The 4LO indicator light continues blinking after the transfer position switch (integration control and panel assembly) is operated*4 The 4LO indicator light continues blinking after the transfer position switch is operated*5, *6 |
ECU power source circuit | |
| Temperature sensor circuit*3 | ||
| Temperature sensor*3 | ||
| High-low transfer shift motor | ||
| High-low transfer limit switch or neutral position detection switch*1 | ||
| 4 wheel drive control ECU | ||
| After the center differential lock switch (integration control and panel assembly) is operated, the center differential lock indicator light remains off or illuminated*4 After the center differential lock switch is operated, the center differential lock indicator light remains off or illuminated*5, *6 |
ECU power source circuit | |
| CAN communication system | ||
| Combination meter assembly | ||
| Center differential lock switch (integration control and panel assembly)*4 Center differential lock switch*5, *6 |
||
| 4 wheel drive control ECU | ||
| After the center differential lock switch (integration control and panel assembly) is operated, the center differential lock indicator light remains blinking*4 After the center differential lock switch is operated, the center differential lock indicator light remains blinking*5, *6 |
ECU power source circuit | |
| Center differential lock shift motor | ||
| Center differential lock limit switch or center differential lock detection switch | ||
| 4 wheel drive control ECU | ||
| After the rear differential lock switch is operated, the rear differential lock indicator light remains off or illuminated*2 | ECU power source circuit | |
| Differential lock switch | ||
| CAN communication system | ||
| Combination meter assembly | ||
| 4 wheel drive control ECU | ||
| After the rear differential lock switch is operated, the rear differential lock indicator light remains blinking*2 | ECU power source circuit | |
| Differential lock shift motor | ||
| Limit switch or rear differential lock position switch | ||
| 4 wheel drive control ECU |
*1: for Manual Transmission
*2: w/ Rear Differential Lock
*3: w/ Temperature Sensor
*4: for Automatic Transmission w/ Entry and Start System
*5: for Manual Transmission w/ Entry and Start System
*6: w/o Entry and Start System