Electric Parking Brake System

PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: U0073/51: Control Module Communication Bus OFF

DTC U0073/51 - Control Module Communication Bus OFF

DTC U0100/53 - Lost Communication with ECM/PCM

DTC U0124/55 - Lost Communication with Lateral Acceleration Sensor Module

DTC U0129/52 - Lost Communication with Brake System Control Module

DTC U0293/54 - Lost Communication with HV ECU

DESCRIPTION

The electric parking brake ECU uses CAN communication with the ECM, skid control ECU and hybrid vehicle control ECU.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Turn the power switch OFF.
(b) Connect the intelligent tester or Techstream to the DLC3.
(c) Turn the power switch ON (IG) and the tester ON.
(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the power switch OFF.
(f) Turn the power switch ON (IG) and check for DTC.

Result





B -- USE SIMULATION METHOD TO CHECK
A -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)