LANE DEPARTURE ALERT 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 buzzer assembly to sound the buzzer. When the lane departure warning camera detects a malfunction in the skid control buzzer circuit, the lane departure warning camera stores DTC C1AA7.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AA7

Skid Control Buzzer Circuit

  • Both of the following conditions are met:

  • Skid control buzzer assembly on malfunction is detected for 240 ms or more.

  • Skid control buzzer assembly off malfunction is detected for 5 seconds or more.

  • Harness or connector

  • Skid control buzzer assembly

  • Lane departure warning camera

WIRING DIAGRAM

E256371E05

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

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - LANE DEPARTURE WARNING CAMERA AND BATTERY)

    1. Disconnect the G74 skid control buzzer assembly connector.

    2. Disconnect the Q13 lane departure warning camera connector.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G74-2 (IG1) - Body ground

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G74-1 (BZ) - Q13-8 (BZ)

      Always

      Below 1 Ω

      G74-1 (BZ) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT SKID CONTROL BUZZER ASSEMBLY

    1. Remove the skid control buzzer assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Inspect the skid control buzzer assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE LANE DEPARTURE WARNING CAMERA

    Click here

    NG

    REPLACE SKID CONTROL BUZZER ASSEMBLY

    for LHD:

    Click here

    for RHD:

    Click here