Automatic Transaxle System - General Information: Troubleshooting
Limp Home Mode
Features a fail-safe function that prevents dangerous situations in the event of a transaxle failure. The vehicle will be driven in limp home mode if the transaxle malfunctions. In this mode, the transaxle operates at a minimal functionality level (fixed shifting, limited shifting, reverse, neutral), making it possible for the vehicle to reach a service center.
Information
Limp Home Mode: Limited shifting
Mechanical limp home mode: Fixed shifting (failure as mechanical parts, solenoid valves, TCM, CAN communication)
Troubleshooting
TROUBLESHOOTING SPECIFICATIONS
| Trouble symptom | Suspect area | Remedy |
|---|---|---|
| Shifting delay, Shifting shock, Poor acceleration | Damaged clutch/brake | Replace the brake or clutch. |
| Faulty hydraulic control | Inspect the solenoid valve. | |
| Faulty hydraulic supply | Inspect the fluid level. | |
| Inspect the fluid cleanliness | ||
| Replace the oil pump | ||
| Not performed TCM learning | Perform the TCM adaptive value learning. | |
| Mechanical limp home mode (locked into 4th, manual shifting disabled) |
Faulty Solenoid valve | Inspect the solenoid valve. |
| Replace the valve body. | ||
| Faulty TCM | Replace the TCM. | |
| Faulty CAN communication | Inspect the CAN communication line. | |
| Limp home mode (locked into 4th, manual shifting 2nd-4th enabled) |
Faulty input & output speed sensor | Replace the input & output speed sensor. |
| Limp home mode (1st-2nd shifting disabled, 3rd-6th shifting enabled) |
Faulty inhibitor switch | Replace the inhibitor switch. |
| Manual shifting disabled | Faulty TCM | Replace the TCM. |
| Faulty connector connection | Check the connection of manual mode connector | |
| Faulty manual mode switch | Replace the manual mode switch housing |