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

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA4 Yaw Rate Sensor Circuit

  • 2 seconds or more have elapsed after the engine switch is turned on (IG).

  • IG voltage is 10 V or more.

  • IG voltage is 10 V or more for 2 seconds or more.

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

  • Airbag system

  • Vehicle stability control system

  • Lane departure warning camera

  • Yaw rate sensor (airbag sensor assembly)
C1AA5 Yaw Rate Sensor Power Supply Voltage Circuit

  • 2 seconds or more have elapsed after the engine switch is turned on (IG).

  • IG voltage is 10 V or more.

  • IG voltage is 10 V or more for 2 seconds or more.

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

  • Airbag system

  • Vehicle stability control system

  • Lane departure warning camera

  • Yaw rate sensor (airbag sensor assembly)
C1AA6 Yaw Rate Sensor Zero Point Malfunction

  • 2 seconds or more have elapsed after the engine switch is turned on (IG).

  • IG voltage is 10 V or more.

  • IG voltage is 10 V or more for 2 seconds or more.

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

  • Airbag system

  • Vehicle stability control 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 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 (AIRBAG SYSTEM)


    1. Check for airbag system DTCs.

      Click here


      Body Electrical > SRS Airbag > Trouble Codes
      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 (VEHICLE STABILITY CONTROL SYSTEM)


    1. Check for vehicle stability control system DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      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

  3. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)


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

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE LANE DEPARTURE WARNING CAMERA Click here