LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:C1AA3

DTC Code DTC Name
C1AA3 Vehicle Speed Sensor Circuit

DESCRIPTION

The lane departure warning camera receives vehicle speed signals from the skid control ECU assembly via CAN communication to control the lane departure alert system. When the lane departure warning camera receives a vehicle speed sensor malfunction signal, DTC C1AA3 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA3 Vehicle Speed Sensor Circuit While driving with the lane departure alert system operating, a vehicle speed sensor malfunction signal is received from the skid control ECU assembly for 5 seconds or more.

  • Electronically controlled brake system

  • Lane departure warning camera

CAUTION / NOTICE / HINT

Note


  • When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed.

    Click here

  • The lane departure alert system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the lane departure alert system after confirming that the communication systems are functioning properly.

    Click here

PROCEDURE


  1. CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    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

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    A

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT)


    1. Clear the DTCs.

      Click here


      Chassis > Lane Departure Alert > Clear DTCs

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

      Tech Tips

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

    3. Check for DTCs.

      Click here


      Chassis > Lane Departure Alert > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA3 is not output A
      DTC C1AA3 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE LANE DEPARTURE WARNING CAMERA Click here