LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:C1AA4, C1AA5, C1AA6

DTC Code DTC Name
C1AA4 Yaw Rate Sensor Circuit
C1AA5 Yaw Rate Sensor Power Supply Voltage Circuit
C1AA6 Yaw Rate Sensor Zero Point Malfunction

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) receives vehicle stability signals from the airbag sensor assembly (yaw rate sensor) and sends the signals to the lane departure warning camera. If the skid control ECU (brake booster with master cylinder assembly) or airbag sensor assembly (yaw rate sensor) detects that the airbag sensor assembly (yaw rate sensor) is malfunctioning, the skid control ECU (brake booster with master cylinder assembly) or airbag sensor assembly (yaw rate sensor) sends a malfunction signal to the lane departure warning camera and the lane departure warning camera stores DTC C1AA4, C1AA5 or C1AA6.

DTC No. DTC Detection Condition Trouble Area
C1AA4 While driving with the lane departure alert system activated, a airbag sensor assembly (yaw rate sensor) malfunction signal sent from the airbag sensor assembly (yaw rate sensor) to the lane departure warning camera is detected for 5 seconds or more.

  • Lane departure warning camera

  • Airbag sensor assembly (yaw rate sensor)
C1AA5 While driving with the lane departure alert system activated, a airbag sensor assembly (yaw rate sensor) power supply voltage malfunction signal sent from the airbag sensor assembly (yaw rate sensor) to the lane departure warning camera is detected for 5 seconds or more.

  • Lane departure warning camera

  • Airbag sensor assembly (yaw rate sensor)
C1AA6 While driving with the lane departure alert system activated, a airbag sensor assembly (yaw rate sensor) zero point malfunction signal sent from the skid control ECU (brake booster with master cylinder assembly) to the lane departure warning camera is detected for 5 seconds or more.

  • Electronically controlled brake 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 (AIRBAG SYSTEM)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.

    5. Check for DTCs Click here.

      Result
      Result Proceed to
      Airbag system DTCs are not output A
      Airbag system DTCs are output B

    B

    GO TO AIRBAG SYSTEM Click here

    A

  2. CHECK FOR DTCs (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Connect the Techstream to the DLC3.

    2. Turn the power 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
      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

  3. 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 C1AA4, C1AA5 and C1AA6 are not output A
      DTC C1AA4, C1AA5 or C1AA6 is output B

    B

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    A

    USE SIMULATION METHOD TO CHECK Click here