DTC U0073: Control Module Communication Bus OFF; DTC U0124: Lost Communication With Lateral Acceleration Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0293: Lost Communication With Hybrid Vehicle Control System [02/2019 - 12/2021]: Description
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The parking brake ECU assembly communicates with the hybrid vehicle control ECU assembly, skid control ECU (brake booster with master cylinder assembly) and deceleration sensor (airbag ECU assembly) via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory | Note |
|---|---|---|---|---|---|
| U0073 | Control Module Communication Bus OFF | With the ignition switch ON, the bus is off (communication with other ECUs is not possible) for several seconds (varies according to communication timing). | CAN communication system | Yes | An electric parking brake system malfunction is displayed on the multi-information display. |
| U0124 | Lost Communication With Lateral Acceleration Sensor Module | With the ignition switch ON and the vehicle being driven at 7 km/h (11 mph) or more, the parking brake ECU assembly cannot receive signals from the deceleration sensor (airbag ECU assembly) for approximately 15 seconds. |
|
Yes | An electric parking brake system malfunction is displayed on the multi-information display. |
| U0129 | Lost Communication with Brake System Control Module | With the ignition switch ON, the parking brake ECU assembly cannot receive signals from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds (malfunction duration differs depending on the signal). |
|
Yes | An electric parking brake system malfunction is displayed on the multi-information display. |
| U0293 | Lost Communication With Hybrid Vehicle Control System | With the ignition switch ON and the vehicle being driven at 6 km/h (9 mph) or more, the parking brake ECU assembly cannot receive signals from the hybrid vehicle control ECU assembly for approximately 10 seconds. |
|
Yes | An electric parking brake system malfunction is displayed on the multi-information display. |