DYNAMIC REAR STEERING SYSTEM, Diagnostic DTC:U0100, U0129, U0130, U1103

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0129 Lost Communication with Brake System Control Module
U0130 Lost Communication with Steering Effort Control Module
U1103 Lost Communication with Stop and Start Control Module

DESCRIPTION

The DRS ECU (rear steering control ECU) sends and receives data to and from the ECM, skid control ECU (brake actuator assembly), engine stop and start ECU*, and VGRS ECU (front steering control ECU) via CAN communication.


DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
U0100 Lost Communication with ECM / PCM "A"

All conditions are met:


  • Before control starts.

  • 1 second or more elapse after turning the engine switch on (IG).

  • The power source voltage is 10 to 16 V.

  • The signal from the ECM is lost for approximately 3 seconds or more.

  • ECM

  • CAN communication system

 Comes on

  • The system recovers from the communication stop

  • Turn the engine switch on (IG) again
U0129 Lost Communication with Brake System Control Module

All conditions are met:


  • 2 seconds or more elapse after turning the engine switch on (IG).

  • The power source voltage is 10 to 16 V.

  • The signal from the skid control ECU (brake actuator assembly) is lost for approximately 3 seconds or more.

  • Skid control ECU (brake actuator assembly)

  • CAN communication system

 Comes on

  • The system recovers from the communication stop

  • Turn the engine switch on (IG) again
U0130 Lost Communication with Steering Effort Control Module

All conditions are met:


  • Before control starts.

  • 1 second or more elapses after turning the engine switch on (IG).

  • The power source voltage is 10 to 16 V.

  • The signal from the VGRS ECU (front steering control ECU) is lost for approximately 3 seconds or more.

  • VGRS ECU (front steering control ECU)

  • CAN communication system

 Comes on

  • The system recovers from the communication stop

  • Turn the engine switch on (IG) again
U1103 Lost Communication with Stop and Start Control Module

All conditions are met:


  • 1 second or more elapse after turning the engine switch on (IG).

  • Power source voltage at 10 to 16 V.

  • The signal from the engine stop and start ECU is lost for approximately 3 seconds or more.

  • Engine stop and start ECU

  • CAN communication system

 Comes on

  • The system recovers from the communication stop

  • Turn the engine switch on (IG) again

CAUTION / NOTICE / HINT

Note

Since DTC C1597 is stored in the VGRS ECU (front steering control ECU), after performing repairs on the dynamic rear steering system, clear the DTCs for the VGRS system.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Chassis > DRS > Clear DTCs

    2. Check for DTCs.

      Click here


      Chassis > DRS > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

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