Limp Home Mode
Features a fail-safe function that prevents dangerous situations in the event of a transmission failure. The vehicle will be driven in limp home mode if the transmission malfunctions. In this mode, the transmission 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 of mechanical parts, solenoid valves, TCM, CAN communication)
| Trouble symptom | Suspected area | Remedy |
|---|---|---|
| Shifting delay, Shifting shock, Poor acceleration | Damaged clutch/brake | Replace the automatic transmission. |
| Faulty hydraulic control | Inspect the solenoid valve. | |
| Faulty hydraulic supply | Inspect the fluid level. | |
| Inspect the fluid cleanliness. | ||
| TCM learning not performed | Perform the TCM adaptive value learning. | |
| Gear lamp (P/R/N/D) of cluster is flashed | Oil pressure characteristics learning not performed | Perform the oil pressure characteristics learning. |
| Mechanical limp home mode (locked into 5th) |
Faulty Solenoid valve | Replace the automatic transmission. |
| Faulty connector connection | Inspect the connector connection. | |
| Replace the E-module | ||
| Faulty TCM | Replace the TCM | |
| Limp home mode (locked into 5th, 2nd-5th manual shifting enabled) |
Faulty input speed sensor | Replace the E-module |
| Faulty output speed sensor | Replace the E-module | |
| Faulty connector connection | Inspect the connector connection. | |
| Replace the E-module | ||
| Manual shifting disabled | Faulty TCM | Replace the TCM. |
| Faulty connector connection | Check the connection of manual mode connector. |