ROAD SIGN ASSIST SYSTEM, Diagnostic DTC:C1AAA

DTC Code DTC Name
C1AAA FCM Destination Information Uninitialized

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store the country specification information received from the main body ECU (multiplex network body ECU). If the forward recognition camera cannot store the country specification information, DTC C1AAA is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AAA FCM Destination Information Uninitialized 2 seconds after the engine switch is turned on (IG), the forward recognition camera cannot store the vehicle specification information.

  • Main body ECU (Multiplex network body ECU)

  • Forward recognition camera

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 forward recognition camera cannot store the vehicle specification information received from the main body ECU (multiplex network body ECU). 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 FOR DTCs (CAN COMMUNICATION DTC OUTPUT)

    Tech Tips

    The forward recognition camera communicates with the main body ECU (multiplex network body ECU) via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.


    1. Check for DTCs.

      Click here


      Body Electrical > Road Sign Assist > Trouble Codes
      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 FOR DTCs (ROAD SIGN ASSIST SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Road Sign Assist > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

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


      1. Turn the engine switch on (IG) and wait 2 seconds or more.

    3. Check for DTCs.

      Click here


      Body Electrical > Road Sign Assist > Trouble Codes
      Result
      Result Proceed to
      DTC C1AAA is not output A
      DTC C1AAA is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera.

      Click here

    2. Perform Forward Recognition Camera Learning.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTCs (ROAD SIGN ASSIST SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Road Sign Assist > Clear DTCs

    2. Perform the following procedure.

      Tech Tips

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


      1. Turn the engine switch on (IG) and wait 2 seconds or more.

    3. Check for DTCs.

      Click here


      Body Electrical > Road Sign Assist > Trouble Codes
      Result
      Result Proceed to
      DTC C1AAA is not output A
      DTC C1AAA is output B

    A

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

    B

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