LANE DEPARTURE ALERT SYSTEM, Diagnostic DTC:C1AA4, C1AA5

DTC Code DTC Name
C1AA4 Yaw Rate Sensor Circuit
C1AA5 Yaw Rate Sensor Power Supply Voltage Circuit

DESCRIPTION

The pre-crash safety city sensor receives vehicle stability signals from the airbag sensor assembly (yaw rate and acceleration sensor). When the pre-crash safety city sensor detects a malfunction in the airbag sensor assembly (yaw rate and acceleration sensor), a DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AA4 Yaw Rate Sensor Circuit When the power switch is on (IG) and the system is operating, the pre-crash safety city sensor continuously receives a malfunction signal for 1 second or more from the airbag sensor assembly (yaw rate and acceleration sensor) while the vehicle is being driven at a speed of 5 km/h (3 mph) or more.

  • Electronically controlled brake system

  • Airbag sensor assembly (yaw rate and acceleration sensor)

  • Pre-crash safety city sensor
C1AA5 Yaw Rate Sensor Power Supply Voltage Circuit When the power switch is on (IG) and the system is operating, the pre-crash safety city sensor continuously receives a power supply malfunction signal for 1 second or more from the airbag sensor assembly (yaw rate and acceleration sensor) while the vehicle is being driven at a speed of 5 km/h (3 mph) or more.

  • Electronically controlled brake system

  • Airbag sensor assembly (yaw rate and acceleration sensor)

  • Pre-crash safety city sensor

CAUTION / NOTICE / HINT

Note


  • When replacing the pre-crash safety city sensor, replace it with a new one and be sure to initialize the settings. If a pre-crash safety city sensor which was installed to another vehicle is used, the information stored in the pre-crash safety city sensor will not match the information from the vehicle and, as a result, a DTC may be stored.

  • If the pre-crash safety city sensor has been replaced, or the windshield glass has been replaced or removed/installed, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.

    Click here

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

    Click here

PROCEDURE


  1. CHECK FOR DTCS (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

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

    5. 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


    1. Clear the DTCs.

      Click here


      Chassis > PCS/LDA/RSA/LVN > 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 > PCS/LDA/RSA/LVN > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA4 and C1AA5 are not output A
      DTC C1AA4 or C1AA5 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. REPLACE PRE-CRASH SAFETY CITY SENSOR


    1. Replace the pre-crash safety city sensor.

      Click here

    2. Perform the "Recognition Camera/Target Position Memory" and "Recognition Camera Axis Adjust" of pre-crash safety city sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTCS


    1. Clear the DTCs.

      Click here


      Chassis > PCS/LDA/RSA/LVN > 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 > PCS/LDA/RSA/LVN > Trouble Codes
      Result
      Result Proceed to
      DTC C1AA4 and C1AA5 are not output A
      DTC C1AA4 or C1AA5 is output B

    A

    END (PRE-CRASH SAFETY CITY SENSOR WAS DEFECTIVE)

    B

    REPLACE AIRBAG SENSOR ASSEMBLY (YAW RATE AND ACCELERATION SENSOR) Click here