LANE-KEEPING ASSIST SYSTEM, Diagnostic DTC:C1A4A

DTC Code DTC Name
C1A4A Skid Control Buzzer Circuit

DESCRIPTION

If the vehicle is about to move out of the lane markers while the lane-keeping assist system is in operation, the driving support ECU sends a sounding signal to the skid control ECU to sound the skid control buzzer in order to warn the driver.

DTC Code DTC Detection Condition Trouble Area
C1A4A While engine switch is on (IG), skid control buzzer circuit malfunction signal is received by skid control ECU for 1 second or more

  • Skid control buzzer

  • Skid control buzzer circuit

  • Skid control ECU

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SKID CONTROL BUZZER)


    1. Select the Active Test, use the intelligent tester to generate a control command, then check that the skid control buzzer sounds.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnosis Note
      Buzzer Skid control buzzer sounds ON / OFF -
      OK
      Skid control buzzer sounds.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

    REPLACE DRIVING SUPPORT ECU Click here