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 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
U0073/51 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.
U0100/53 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

 An electric parking brake system malfunction is displayed on the multi-information display.
U0124/55 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.

  • CAN communication system

  • Deceleration sensor (Airbag sensor assembly)

 An electric parking brake system malfunction is displayed on the multi-information display.
U0129/52 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).

  • CAN communication system

  • Skid control ECU (Master cylinder solenoid)

 An electric parking brake system malfunction is displayed on the multi-information display.

PROCEDURE


  1. GO TO CAN COMMUNICATION SYSTEM


    1. Go to CAN communication system (for LHD: See page , for RHD: Click here.


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