LKA/LDA SYSTEM, Diagnostic DTC:C1AAC

DTC Code DTC Name
C1AAC Vehicle Information Unmatched

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store the vehicle information received from the power management control ECU. If the vehicle information stored in the forward recognition camera is different from that stored in the power management control ECU, DTC C1AAC is stored.

DTC No. DTC Detection Condition Trouble Area
C1AAC 2 seconds after the power switch is turned on (IG), the vehicle information received from the power management control ECU and that stored in the forward recognition camera do not match.

  • CAN communication system

  • Forward recognition camera

  • Power management control ECU

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.

Tech Tips

This DTC is stored when the vehicle information stored in the forward recognition camera and that stored in the power management control ECU do not match. If the forward recognition camera or power management control ECU has been replaced, check if a forward recognition camera or power management control ECU from another vehicle was used.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION DTC OUTPUT)

    Tech Tips

    The forward recognition camera communicates with the power management control ECU via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC U0293 is not output A
      DTC U0293 is output (for LHD) B
      DTC U0293 is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. READ VALUE USING GTS (VEHICLE INFORMATION)


    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 / Front Recognition Camera / Data List.

      Front Recognition Camera
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Information (2WD/4WD)

      Vehicle information (drivetrain) stored in forward recognition camera/

      2WD, AWD or Unknown

      2WD: for 2WD

      AWD: for AWD

      Unknown: Vehicle information not confirmed

      		 -
      Vehicle Information (Conv/HV)

      Vehicle information (conventional/ hybrid) stored in forward recognition camera/

      Conv, HV or Unknown

      Conv: Conventional

      HV: Hybrid vehicle

      Unknown: Vehicle information not confirmed

      		 -

      Tech Tips


      • The vehicle information stored in the forward recognition camera is displayed on the Data List.

      • If the vehicle information stored in the forward recognition camera is different from the actual vehicle specifications, the vehicle information stored in the forward recognition camera may be incorrect. Check for DTCs and replace the forward recognition camera if necessary.

      • If the vehicle information stored in the forward recognition camera matches the actual vehicle specifications, the installed power management control ECU is incompatible. Replace the power management control ECU with a correct one.

      Result
      Result Proceed to
      Vehicle information stored in forward recognition camera and actual vehicle specifications do not match A
      Vehicle information stored in forward recognition camera and actual vehicle specifications match B

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

  3. CHECK DTC OUTPUT (LKA/LDA SYSTEM)


    1. Clear the DTCs Click here.

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

      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 2 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AAC is output A
      DTC C1AAC is not output B

    A

    REPLACE FORWARD RECOGNITION CAMERA Click here

    B

    USE SIMULATION METHOD TO CHECK Click here