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Home >> Toyota >> 2005 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics) >> Abs With EBD & BA & TRAC & VSC System >> Skid Control Buzzer Circuit >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assy, perform zero point calibration (see CALIBRATION ).

HINT:

Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the hand-held tester.

  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (SKID CONTROL BUZZER) 
    1. Connect the hand-held tester to the DLC3.
    2. Start the engine.
    3. Select the "VSC/BR WARN BUZ" in the ACTIVE TEST and operate the skid control buzzer by the hand-held tester.
      TEST CONDITION REFERENCE

      Item Vehicle Condition / Test Details Diagnostic Note
      VSC / BR WARN BUZ Turns VSC / BRAKE warning buzzer ON / OFF Buzzer can be heard
    4. Check that skid control buzzer sounds by operating the hand-held tester.

    OK: The skid control buzzer sounds in accordance with operation of the hand-held tester. 

    NG: Go to step 2 

    OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 

  2. INSPECT SKID CONTROL BUZZER ASSY 
    1. Disconnect the skid control buzzer connector.
    2. Apply a battery positive voltage to terminals 1 and 2 of the skid control buzzer connector, and check that the buzzer sounds.

    OK: The skid control buzzer sound should be heard. 

    NG: REPLACE BUZZER ASSY 

    Fig 1: Inspecting Skid Control Buzzer Assy
    G02662876Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER - SKID CONTROL ECU) 
    1. Disconnect the skid control buzzer connector and the skid control ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      RESISTANCE CONDITION (1 OF 2)

      Tester Connection Specified Condition
      S1-30 (BZ)-V10-1 (BZ) Below 1 Ω
    3. Measure the resistance according to the value (s) in the table below.

    Standard: 

    RESISTANCE CONDITION (2 OF 2)

    Tester Connection Specified Condition
    S1-30 (BZ) - Body ground 10 kΩ or higher
    Fig 2: Identifying Connector Terminal Skid Control Buzzer - Skid Control ECU
    G02662877Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  )