DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0124: Lost Communication With Lateral Acceleration Sensor Module; DTC U0129: Lost Communication With Brake System Control Module [08/2020 - ]: Description
The parking brake ECU assembly uses CAN communication with the ECM, deceleration sensor (airbag sensor assembly) and skid control ECU (master cylinder solenoid).
| DTC No. | Detection Condition | Trouble Area | Note |
|---|---|---|---|
| U0073 | With the engine switch on (IG), the bus is off (communication with other ECUs is not possible) for 2 seconds. | CAN communication system | An electric parking brake system malfunction is displayed on the multi-information display. |
| U0100 | With the engine switch on (IG) and the vehicle being driven at 15 km/h (9 mph) or more, the parking brake ECU assembly cannot receive signals from the ECM for approximately 1 second or 10 seconds (malfunction duration differs depending on the signal). |
|
An electric parking brake system malfunction is displayed on the multi-information display. |
| U0124 | With the engine switch on (IG) and the vehicle being driven at 7 km/h (4.3 mph) or more, the parking brake ECU assembly cannot receive signals from the deceleration sensor for approximately 1 second. |
|
An electric parking brake system malfunction is displayed on the multi-information display. |
| U0129 | With the engine switch on (IG), the parking brake ECU assembly cannot receive signals from the skid control ECU for approximately 1 second or 10 seconds (malfunction duration differs depending on the signal). |
|
An electric parking brake system malfunction is displayed on the multi-information display. |