FORWARD RECOGNITION CAMERA SYSTEM, Diagnostic DTC:C1AA3

DTC Code DTC Name
C1AA3 Vehicle Speed Sensor Circuit

DESCRIPTION

The forward recognition camera receives vehicle speed signals from the skid control ECU assembly. If the skid control ECU assembly receives a vehicle speed sensor malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA3 is stored.

DTC No. DTC Detection Condition Trouble Area
C1AA3 2 seconds after the power switch is turned on (IG), a signal from the skid control ECU assembly indicating a malfunction in a vehicle speed sensor is detected by the forward recognition camera for 5 seconds or more.

  • Electronically controlled brake system

  • Skid control ECU assembly

  • 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.

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.


PROCEDURE


  1. CHECK DTC OUTPUT (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

    Tech Tips

    If DTC C1AA3 is stored, the electronically controlled brake system may be malfunctioning. Check for DTCs related to the electronically controlled brake system first.


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output. A
      Electronically controlled brake system DTCs are output. B

    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  2. CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA 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 7 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AA3 is output A
      DTC C1AA3 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 (FORWARD RECOGNITION CAMERA 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 7 seconds or more.

    3. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AA3 is output A
      DTC C1AA3 is not output B

    A

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    B

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)