LANE DEPARTURE ALERT SYSTEM(w/ Steering Control), 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. Detection Item DTC Detection Condition Trouble Area
C1AA3 Vehicle Speed Sensor Circuit 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 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 (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


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      Electronically controlled brake system DTCs are not output A
      Electronically controlled brake system DTCs are output B

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


    1. Clear the DTCs.

      Click here


      Chassis > LKA/LDA > 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 power switch on (IG) and wait 7 seconds or more.

    3. Check for DTCs.

      Click here


      Chassis > LKA/LDA > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA3 is not output A
      DTC C1AA3 is output B

    A
    B
  3. REPLACE FORWARD RECOGNITION CAMERA


    1. Replace the forward recognition camera.

      Click here

    2. Perform forward recognition camera adjustment.

      Click here

      Result
      Proceed to
      NEXT

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


    1. Clear the DTCs.

      Click here


      Chassis > LKA/LDA > 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 power switch on (IG) and wait 7 seconds or more.

    3. Check for DTCs.

      Click here


      Chassis > LKA/LDA > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA3 is not output A
      DTC C1AA3 is output B

    A
    B