POWER STEERING SYSTEM, Diagnostic DTC:U0129, U0130, U1104, U1105

DTC Code DTC Name
U0129 Lost Communication with Brake System Control Module
U0130 Lost Communication with Steering Effort Control Module
U1104 Lost Communication with Driving Support ECU
U1105 Lost Communication with Parking Assist ECU

DESCRIPTION

The power steering ECU inputs and outputs driving support ECU, clearance warning ECU, skid control ECU, and steering control ECU signals via CAN communication.

DTC Code Detection Condition Trouble Area
U0129 Skid control ECU communication error

  • CAN communication system

  • Skid control ECU (when only U0129 is output)
U0130 Steering control ECU communication error

  • CAN communication system

  • Steering control ECU (when only U0130 is output)
U1104 Driving support ECU communication error

  • CAN communication system

  • Driving support ECU (when only U1104 is output)
U01105 Clearance warning ECU communication error

  • CAN communication system

  • Clearance warning ECU (when only U1105 is output)

Tech Tips

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC


    1. Using the intelligent tester, check for DTCs Click here.

      Result
      Result Proceed to
      DTCs is not output A

      for LHD:

      DTCs is output

      		 B

      for RHD:

      DTCs is output

      		 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