VEHICLE STABILITY CONTROL SYSTEM Skid Control Buzzer Circuit

DESCRIPTION

The skid control buzzer sounds upon receiving a signal from the skid control ECU (brake actuator assembly).

WIRING DIAGRAM

A01FDFRE18

INSPECTION PROCEDURE

Note


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

  • When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.

PROCEDURE


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


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

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

    6. Check that the skid control buzzer sounds/stops when turning the skid control buzzer on/off by using the GTS.

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

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  2. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. Turn the engine switch off.

    2. Disconnect the skid control buzzer connector.

    3. A01FGATE15
      Text in Illustration
      *a

      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
      N1-2 (IG1) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SKID CONTROL BUZZER


    1. Remove the skid control buzzer Click here.

    2. A01FGBFE12
      Text in Illustration
      *a

      Component without harness connected

      (Skid Control Buzzer)

      Apply battery voltage to the skid control buzzer, and check that the buzzer sounds.

      OK
      Measurement Condition Specified Condition
      Battery positive (+) voltage - Terminal 2 (IG1) Skid control buzzer sounds
      Battery negative (-) voltage - Terminal 1 (BZ)

    NG

    REPLACE SKID CONTROL BUZZER ASSEMBLY Click here

    OK

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


    1. Turn the engine switch off.

    2. Disconnect the A13 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the N1 skid control buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A13-21 (BZ) - N1-1 (BZ) Always Below 1 Ω
      A13-21 (BZ) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here