LANE DEPARTURE ALERT SYSTEM(w/ Dynamic Radar Cruise Control System), Diagnostic DTC:C1AA7

DTC Code DTC Name
C1AA7 Skid Control Buzzer Circuit

DESCRIPTION

The lane departure warning camera sends a buzzer request signal to the skid control ECU to sound the skid control buzzer assembly. When the skid control ECU detects a malfunction in the skid control buzzer circuit, a malfunction signal is sent to the lane departure warning camera and the lane departure warning camera stores DTC C1AA7.

DTC Code DTC Detection Condition Trouble Area
C1AA7 While the power switch is on (IG), a skid control buzzer circuit malfunction signal is received from the skid control ECU for 5 seconds or more.

  • Skid control buzzer circuit

  • Skid control ECU (brake booster with master cylinder assembly)

  • Lane departure warning camera

WIRING DIAGRAM

A0005CCE03

CAUTION / NOTICE / HINT

Note

When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed Click here.

PROCEDURE


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


    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 / Active Test.

    5. According to the display on the GTS, perform the Active Test.

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

    6. Turn the power switch off.


    NG

    GO TO SKID CONTROL BUZZER CIRCUIT Click here

    OK

  2. REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

    Replace brake booster with master cylinder assembly (See page for LHD, Click here for RHD).


    NEXT

  3. CLEAR DTCs


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.

    4. Clear DTCs.

    5. Turn the power switch off.


    NEXT

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.

    4. Check for DTCs.

      OK
      DTC C1AA7 is not output.

    5. Turn the power switch off.


    OK

    END

    NG

    REPLACE LANE DEPARTURE WARNING CAMERA Click here