LANE DEPARTURE ALERT SYSTEM(w/ Steering Control), 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 power steering ECU assembly is detected, the forward recognition camera notifies other ECUs and DTC U023A is stored.

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

  • CAN communication system

  • Forward recognition camera

  • Power steering ECU assembly

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 adjustment.

    Click here

  • The lane departure alert system (w/ steering control) 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)

    Tech Tips

    If DTC U023A is stored, the power steering system may be malfunctioning. Check for DTCs related to the power steering system first.


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / EMPS / Trouble Codes.

    5. Check for DTCs.

      Click here

      Result
      Result Proceed to
      Power steering system DTCs are not output A
      Power steering system DTCs are output B

    B

    GO TO POWER STEERING SYSTEM Click here

    A

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM (w/ Steering Control))


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

    5. Clear the DTCs.

      Click here

    6. Perform the following procedure.

      Tech Tips

      If the following procedure is not performed, the previously output DTC cannot be detected.


      1. Turn the power switch on (IG) and wait 7 seconds or more.

    7. Check for DTCs.

      Click here

      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