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

A01V8NRE05
*a from IG1 NO.1 Relay
*b ECU-IG1 NO.2
*c Skid Control Buzzer Assembly
*d Lane Departure Warning Camera

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.

      Click here

    2. Inspect the skid control buzzer assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE LANE DEPARTURE WARNING CAMERA Click here

    NG

    REPLACE SKID CONTROL BUZZER ASSEMBLY Click here