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 (brake actuator assembly) via CAN communication to control the lane departure alert system. When the lane departure warning camera receives information that there is a malfunction in the vehicle speed sensor, DTC C1AA3 is stored.

DTC No. DTC Detection Condition Trouble Area
C1AA3 While driving with the lane departure alert system activated, a signal indicating a malfunction in the vehicle speed sensor is received from the skid control ECU (brake actuator assembly) for 5 seconds or more.

  • Vehicle stability control system

  • Lane departure warning camera

INSPECTION PROCEDURE

Note


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

  • When replacing the lane departure warning camera, always replace it with a new one. If a lane departure warning camera which was installed to another vehicle is used, the information stored in the lane departure warning camera will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE


  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)


    1. Connect the Techstream to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      Vehicle stability control system DTCs are not output A
      Vehicle stability control system DTCs are output B

    B

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    A

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)


    1. Clear the DTCs Click here.

    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.

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

    B

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    A

    USE SIMULATION METHOD TO CHECK Click here