VEHICLE STABILITY CONTROL SYSTEM Skid Control Buzzer Circuit

DESCRIPTION

The skid control buzzer sounds upon receiving a signal from the skid control ECU.

WIRING DIAGRAM

A00EAIZE16

INSPECTION PROCEDURE

Note

When replacing the skid control ECU (brake actuator assembly), perform the engine variant learning Click here.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DSS SIGNAL BUZZER)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine.

    3. Select the Active Test mode on the intelligent tester Click here.

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

    4. Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using the intelligent tester.

      Result
      Result Proceed to
      Buzzer does not sound or sounds constantly. A
      Buzzer sounds/stops. B

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER POWER SOURCE TERMINAL)


    1. Turn the ignition switch off.

    2. Disconnect the skid control buzzer connector.

    3. A00E7PKE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Skid Control Buzzer)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D9-2 (IG1) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SKID CONTROL BUZZER


    1. Turn the ignition switch off.

    2. Remove the skid control buzzer Click here.

    3. A00E6ZAE01
      Text in Illustration
      *1

      Component without harness connected

      (Skid Control Buzzer)

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

      OK
      The skid control buzzer sounds.

    NG

    REPLACE SKID CONTROL BUZZER Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER - SKID CONTROL ECU)


    1. Disconnect the skid control buzzer connector.

    2. Disconnect the skid control ECU connector.

    3. A00EB3LE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Skid Control Buzzer)
      *2

      Front view of wire harness connector

      (to Skid Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D9-1 (BZ) - A42-42 (BZ) Always Below 1 Ω
      D9-1 (BZ) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here