LANE-KEEPING ASSIST SYSTEM, Diagnostic DTC:U0122, U0123, U0131, U0155, U1104, U1112, U1113

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module
U0123 Lost Communication with Yaw Rate Sensor Module
U0131 Lost Communication with Power Steering Control Module
U0155 Lost Communication with Combination Meter
U1104 Lost Communication with Driving Support ECU
U1112 Lost Communication with Combination Switch ECU
U1113 Lost Communication with Steering Pad ECU

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
U0122 While power switch ON (IG), communication stop between skid control ECU and driving support ECU continues for 1 second or more

  • Skid control ECU

  • CAN communication system

  • Driving support ECU
U0123 While power switch ON (IG), communication stop between yaw rate sensor and driving support ECU continues for 1 second or more

  • Yaw rate sensor

  • CAN communication system

  • Driving support ECU
U0131 While power switch ON (IG), communication stop between power steering ECU and driving support ECU continues for 1 second or more

  • Power steering ECU assembly

  • CAN communication system

  • Driving support ECU
U0155 While power switch ON (IG), communication stop between No. 1 meter ECU sub-assembly and driving support ECU continues for 1 second or more

  • No. 1 meter ECU sub-assembly

  • CAN communication system

  • Driving support ECU
U1104 While power switch ON (IG), communication stop between driving support ECU and skid control ECU or power steering ECU continues for 1 second or more

  • Driving support ECU

  • CAN communication system

  • Skid control ECU

  • Power steering ECU assembly
U1112 While power switch ON (IG), communication stop between combination switch and driving support ECU continues for 1 second or more

  • Combination switch assembly

  • CAN communication system

  • Driving support ECU
U1113 While power switch ON (IG), communication stop between steering pad switch assembly and driving support ECU continues for 1 second or more

  • Steering pad switch assembly

  • CAN communication system

  • Driving support ECU

INSPECTION PROCEDURE

Tech Tips

This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here