PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: U0073,U0100,U0124,U0129,U0293; Control Module Communication Bus OFF; 2018 - 2020 MY Camry HV [07/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM10000000150A5
Model Year Start: 2018	Model: Camry HV	Prod Date Range: [07/2017 - 10/2020]
Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: U0073,U0100,U0124,U0129,U0293; Control Module Communication Bus OFF; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

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

DTC

U0293

Lost Communication with Hybrid Control Module

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
U0073	Control Module Communication Bus OFF	Both of following conditions are met: Power switch on (IG) Bus is off (communication with other ECUs is not possible).	CAN communication system	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0100	Lost Communication with ECM / PCM "A"	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 ECM for approximately 15 seconds.	CAN communication system ECM	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0124	Lost Communication with Lateral Acceleration Sensor Module	Both of following conditions are met: Vehicle is being driven at 6 km/h (4 mph) or more. Parking brake ECU (brake actuator assembly) cannot receive signals from the deceleration sensor (airbag sensor assembly) for approximately 15 seconds.	CAN communication system Deceleration sensor (Airbag sensor assembly)	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.
U0129	Lost Communication with Brake System Control Module	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.
U0293	Lost Communication with Hybrid Control Module	Both of following conditions are met: Vehicle being driven at 6 km/h (4 mph) or more. Parking brake ECU cannot receive signals from the hybrid vehicle control ECU assembly for approximately 15 seconds.	CAN communication system Hybrid vehicle control ECU assembly	DTC stored	An electric parking brake system malfunction is displayed on the multi-information display.

PROCEDURE

1.	GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here

END