ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:U0073, U0114, U0124

DTC Code DTC Name
U0073 Control Module Communication Bus OFF
U0114 Lost Communication with 4WD Control ECU
U0124 Lost Communication with Lateral Acceleration Sensor Module

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the acceleration sensor (airbag sensor assembly) and the 4 wheel drive control ECU via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
U0073

One of the following conditions is met:


  1. When the IG1 terminal voltage is between 10 and 17.4 V, after the output of data from the skid control ECU (brake actuator assembly) is completed, the sending operation continues for 5 seconds or more.

  2. The condition that the bus OFF state occurs once or more within 0.1 seconds occurs 10 times in succession (sent signals cannot be received).

  3. When the IG1 terminal voltage is between 10 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering angle sensor continues for 1 second or more.

  4. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.


    • The condition that a delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering angle sensor occurs more than once within 5 seconds.

 CAN communication system
U0114 CAN signal from the 4 wheel drive control ECU is lost or malfunctioning for 1.2 seconds. CAN communication system
U0124

Either condition is met:


  1. When the IG1 terminal voltage is between 10 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.

  2. When the IG1 terminal voltage is between 10 and 17.4 V, the following occurs 10 times in succession.


    • The condition that data from the acceleration sensor cannot be received occurs once or more within 5 seconds.

 CAN communication system

PROCEDURE


  1. RECONFIRM DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC not output A
      DTC output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here