ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:U0073/51, U0100/53, U0124/55, U0129/52

DTC Code DTC Name
U0073/51 Control Module Communication Bus OFF
U0100/53 Lost Communication with ECM/PCM
U0124/55 Lost Communication with Lateral Acceleration Sensor Module
U0129/52 Lost Communication with Brake System Control Module

DESCRIPTION

The parking brake ECU assembly communicates with the ECM, skid control ECU (brake actuator assembly) and deceleration sensor (yaw rate sensor) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0073/51 Control Module Communication Bus OFF With the engine switch on (IG), the bus is off (communication with other ECUs is not possible) for 2 seconds. CAN communication system
U0100/53 Lost Communication with ECM/PCM 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).

  • CAN communication system

  • ECM
U0124/55 Lost Communication with Lateral Acceleration Sensor Module With the engine switch on (IG), the parking brake ECU assembly cannot receive signals from the deceleration sensor (yaw rate sensor) for approximately 1 second.

  • CAN communication system

  • Deceleration sensor (Yaw rate sensor)
U0129/52 Lost Communication with Brake System Control Module With the engine switch on (IG), the parking brake ECU assembly cannot receive signals from the skid control ECU (brake actuator assembly) for approximately 1 second or 10 seconds (malfunction duration differs depending on the signal).

  • CAN communication system

  • Skid control ECU (Brake actuator assembly)

PROCEDURE


  1. GO TO CAN COMMUNICATION SYSTEM


    1. Go to CAN communication system.


      Result
      Proceed to
      NEXT

    NEXT

    END