VARIABLE GEAR RATIO STEERING SYSTEM, Diagnostic DTC:U0100/56, U0125/56, U0126/56, U0129/56, U0131/56, U0134/56

DTC Code DTC Name
U0100/56 Lost Communication with ECM / PCM "A"
U0125/56 Lost Communication with Yaw Rate Sensor Module
U0126/56 Lost Communication with Steering Angle Sensor Module
U0129/56 Lost Communication with Brake System Control Module
U0131/56 Lost Communication with Power Steering Control Module
U0134/56 Lost Communication with DRS Module

DESCRIPTION

The VGRS ECU (front steering control ECU) receives signals from the ECM, skid control ECU (brake actuator assembly), yaw rate sensor, steering sensor, power steering ECU assembly and DRS ECU (rear steering control ECU) via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.

DTC Code DTC Detection Condition Trouble Area
U0100/56

Both conditions are met for approximately 3 seconds or more:


  • The engine switch is on (IG).

  • The signal from the ECM is lost.

  • ECM

  • CAN communication system
U0125/56

Both conditions are met for approximately 12 seconds or more:


  • The engine switch is on (IG).

  • The signal from the yaw rate sensor is lost.

  • Yaw rate sensor

  • CAN communication system
U0126/56

Both conditions are met for approximately 3 seconds or more:


  • The engine switch is on (IG).

  • The signal from the steering sensor is lost.

  • Steering sensor

  • CAN communication system
U0129/56

Both conditions are met for approximately 3 seconds or more:


  • The engine switch is on (IG).

  • The signal from the skid control ECU is lost.

  • Skid control ECU (Brake actuator assembly)

  • CAN communication system
U0131/56

Both conditions are met for approximately 3 seconds or more:


  • The engine switch is on (IG).

  • The signal from the power steering ECU assembly is lost.

  • Power steering ECU assembly

  • CAN communication system
U0134/56

Both conditions are met for approximately 3 seconds or more:


  • The engine switch is on (IG).

  • The signal from the DRS ECU (rear steering control ECU) is lost.

  • DRS ECU (rear steering control ECU)

  • CAN communication system

INSPECTION PROCEDURE

Note

Since DTC C1B09/19 is stored in the DRS ECU (rear steering control ECU), after performing repairs on the VGRS system, clear the DTCs for the dynamic rear steering system.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output for LHD B
      for RHD C

    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

    A

    USE SIMULATION METHOD TO CHECK Click here