DTC U0078-88: Control Module Communication Bus "F" Off Bus Off; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message [02/2024 - ]: Description
The trailer brake control ECU (brake control with bracket relay) receives signals from the skid control ECU (brake actuator assembly) and combination meter assembly via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from | Priority |
|---|---|---|---|---|---|
| U0078-88 | Control Module Communication Bus "F" Off Bus Off | Bus off condition continues for 1 second or more | CAN communication system | Trailer Brake Controller | B |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message | The trailer brake control ECU (brake control with bracket relay) is continuously unable to receive data from the skid control ECU (brake actuator assembly) for 1 second or more. |
|
Trailer Brake Controller | B |
| U0155-87 | Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message | With a vehicle speed of 6 km/h (4 mph), the system is continuously unable to receive data from the combination meter assembly for 5 seconds or more. |
|
Trailer Brake Controller | B |