POWER STEERING SYSTEM, Diagnostic DTC:U0100,U0129 and U1103

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

DESCRIPTION

The power steering ECU receives signals from the ECM, skid control ECU and engine stop and start ECU via the CAN communication system.

DTC Code

DTC Detection Condition

Trouble Area

U0100

Lost communication with the ECM/PCM "A".

  • CAN communication system

  • ECM

U0129

Lost communication with the brake system control module.

  • CAN communication system

  • Skid control ECU

U1103

Lost communication with the stop and start control module.

  • CAN communication system

  • Engine stop and start ECU

PROCEDURE

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

    1. Clear the DTC(s) (Click here).

    2. Check for DTCs (Click here).

      OK

      DTC is not output.

    USE SIMULATION METHOD TO CHECK

    (Click here)

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

    (Click here)