ROAD SIGN ASSIST SYSTEM, Diagnostic DTC:C1AA1

DTC Code DTC Name
C1AA1 FCM Destination Information Unmatched

DESCRIPTION

When the forward recognition camera is replaced with a new one, it stores country specification information received from the main body ECU (multiplex network body ECU). If the country specification information stored in the forward recognition camera is different from that stored in the main body ECU (multiplex network body ECU), DTC C1AA1 is stored.

DTC No. DTC Detection Condition Trouble Area
C1AA1 2 seconds after the power switch is turned on (IG), destination information stored in the forward recognition camera and that received from the main body ECU (multiplex network body ECU) do not match for 5 seconds or more.

  • CAN communication system

  • Forward recognition camera

  • Main body ECU (multiplex network body ECU)

CAUTION / NOTICE / HINT

Note


  • Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

  • 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 country specification information stored in the forward recognition camera and that stored in the main body ECU (multiplex network body ECU) do not match. If the forward recognition camera or main body ECU (multiplex network body ECU) has been replaced, check if a forward recognition camera or main body ECU (multiplex network body ECU) from another vehicle was used.

PROCEDURE


  1. CHECK DTC OUTPUT (CAN COMMUNICATION DTC OUTPUT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC U0142 is not output A
      DTC U0142 is output (for LHD) B
      DTC U0142 is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

    5. Clear the DTCs Click here.

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

      Tech Tips

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

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AA1 is output A
      DTC C1AA1 is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera Click here.

    2. Adjust the forward recognition camera Click here.


    NEXT

  4. CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

    5. Clear the DTCs Click here.

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

      Tech Tips

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

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AA1 is output A
      DTC C1AA1 is not output B

    A

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    B

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)