POWER STEERING SYSTEM (w/ VSC), Diagnostic DTC:U0100, U0126, U0129

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module

DESCRIPTION

The power steering ECU receives signals from the ECM, steering angle sensor and skid control ECU via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
U0100 The engine speed signal is lost.

  • ECM

  • CAN communication system

  • Power steering ECU assembly
U0126 The steering angle signal is lost.

  • Steering angle sensor (Spiral cable sub-assembly)

  • CAN communication system

  • Power steering ECU assembly
U0129 The vehicle speed signal is lost.

  • Skid control ECU

  • CAN communication system

  • Power steering ECU assembly

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Clear the DTC(s) Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. for LHD with Entry and Start System B
      for LHD without Entry and Start System C
      for RHD with Entry and Start System D
      for RHD without Entry and Start System E

    B

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

    C

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

    D

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

    E

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

    A

    USE SIMULATION METHOD TO CHECK Click here