LANE DEPARTURE ALERT SYSTEM (w/o 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 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 Code DTC Detection Condition Trouble Area
C1AA7

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.

  • Wire harness or connector

  • Skid control buzzer assembly

  • Lane departure warning camera

WIRING DIAGRAM

A01G9S2E03

INSPECTION PROCEDURE

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 (POWER SOURCE VOLTAGE)


    1. Disconnect the H65 skid control buzzer assembly connector.

    2. Turn the engine switch on (IG).

    3. A01G5PTE23
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control Buzzer Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      H65-2 (IG1) - Body ground Engine switch on (IG) 11 to 14 V

    4. Turn the engine switch off.

    5. Reconnect the H65 skid control buzzer assembly connector.


    NG

    CHECK POWER SOURCE CIRCUIT

    OK

  2. INSPECT SKID CONTROL BUZZER ASSEMBLY


    1. Remove the skid control buzzer assembly Click here.

    2. A01G4C1E13
      Text in Illustration
      *a

      Component without harness connected

      (Skid Control Buzzer Assembly)

      Connect a negative (-) lead from the battery to terminal 1 (BZ), and a positive (+) lead to terminal 2 (IG1) of the skid control buzzer assembly, and then check that the buzzer sounds.

      OK
      The skid control buzzer assembly sounds.

    3. Reinstall the skid control buzzer assembly.


    NG

    REPLACE SKID CONTROL BUZZER ASSEMBLY Click here

    OK

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


    1. Disconnect the T12 lane departure warning camera connector.

    2. Disconnect the H65 skid control buzzer assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T12-8 (BZ) - H65-1 (BZ) Always Below 1 Ω
      T12-8 (BZ) or H65-1 (BZ) - Body ground Always 10 kΩ or higher

    4. Reconnect the H65 skid control buzzer assembly connector.

    5. Reconnect the T12 lane departure warning camera connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE LANE DEPARTURE WARNING CAMERA Click here