LANE-KEEPING ASSIST SYSTEM, Diagnostic DTC:C1A4A

DTC Code DTC Name
C1A4A Skid Control Buzzer Circuit

DESCRIPTION

The driving support ECU sends a sounding signal to the brake actuator assembly to sound the skid control buzzer.

DTC Code DTC Detection Condition Trouble Area
C1A4A While engine switch is on (IG), skid control buzzer circuit malfunction signal is received by brake actuator assembly for 3 seconds.

  • Skid control buzzer

  • Skid control buzzer circuit

  • Brake actuator assembly

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (DSS SIGNAL BUZZER)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test Click here.

      ABS/VSC/TRAC
      Tester Display Test Part Control Range Diagnostic Note
      DSS Signal Buzzer Skid control buzzer ON/OFF The buzzer can be heard.
      OK
      Skid control buzzer sounds.

    NG

    GO TO VEHICLE STABILITY CONTROL SYSTEM Click here

    OK

  2. REPLACE BRAKE ACTUATOR ASSEMBLY


    1. Replace the brake actuator assembly with a new one Click here.


    NEXT

  3. CHECK DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1A4A is not output.

      Note

      When replacing the driving support ECU, always replace it with a new one and be sure to perform initialization Click here. If an ECU which was installed to another vehicle is used, the information stored in the ECU will not match the information from the vehicle, and as a result, a DTC may be stored.


    NG

    REPLACE DRIVING SUPPORT ECU Click here

    OK

    END (BRAKE ACTUATOR ASSEMBLY IS DEFECTIVE)