LKA/LDA SYSTEM, Diagnostic DTC:U023A

DTC Code DTC Name
U023A Lost Communication with Front Camera Module

DESCRIPTION

When a communication error between the forward recognition camera and the rack and pinion power steering gear assembly is detected, the forward recognition camera notifies other ECUs and stores DTC U023A is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
U023A Lost Communication with Front Camera Module When the engine switch is on for 2 seconds or more, a communication malfunction between the forward recognition camera and the rack and pinion power steering gear assembly is detected for 5 seconds or more.

  • Power steering system

  • Forward recognition camera

CAUTION / NOTICE / HINT

Note


  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.

  • If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.

    Click here

  • The LKA/LDA system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (POWER STEERING SYSTEM)


    1. Check for DTCs.

      Click here


      Chassis > EMPS > Trouble Codes

      Tech Tips

      When the LKA/LDA system outputs DTC U023A, the power steering system may also output DTC U023A. If DTC U023A is output, perform diagnosis for the power steering system first.

      Result
      Result Proceed to
      DTC U023A is not output A
      DTC U023A is output B

    B

    GO TO POWER STEERING SYSTEM Click here

    A

  2. CHECK FOR DTCs (LKA/LDA SYSTEM)


    1. Clear the DTCs.

      Click here


      Chassis > LKA/LDA > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here


      Chassis > LKA/LDA > Trouble Codes
      Result
      Result Proceed to
      DTC U023A is not output A
      DTC U023A is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE FORWARD RECOGNITION CAMERA Click here