DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [08/2021 - ]: Description

The parking brake ECU (brake actuator assembly) communicates with the acceleration sensor (airbag ECU assembly), skid control ECU (brake booster with master cylinder assembly), main body ECU (multiplex network body ECU) and hybrid vehicle control ECU via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
U0125-87	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	Both of following conditions are met: Vehicle being driven at 6 km/h (4 mph) or more. Parking brake ECU (brake actuator assembly) cannot receive signals from the acceleration sensor (airbag ECU assembly).	CAN communication system Acceleration sensor (airbag ECU assembly)	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0129-87	Lost Communication with Brake System Control Module "A" Missing Message	Both of following conditions are met: Power switch on (IG). Parking brake ECU (brake actuator assembly) cannot receive signals from the skid control ECU (brake booster with master cylinder assembly) for approximately 15 seconds or 30 seconds (malfunction duration differs depending on the signal).	CAN communication system Skid control ECU (brake booster with master cylinder assembly)	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0140-87	Lost Communication with Body Control Module Missing Message	Parking brake ECU (brake actuator assembly) cannot receive signals from the main body ECU (multiplex network body ECU) for approximately 2 seconds.	CAN communication system Main body ECU (multiplex network body ECU)	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0293-87	Lost Communication with Hybrid/EV Powertrain Control Module Missing Message	Both of following conditions are met: Vehicle being driven at 6 km/h (4 mph) or more. Parking brake ECU (brake actuator assembly) cannot receive signals from the hybrid vehicle control ECU for approximately 15 seconds.	CAN communication system Hybrid vehicle control ECU	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.