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Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. CHECK VSC OFF INDICATOR LIGHT 
    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch to the ON position.
    3. Ground terminal VSCW of the skid control ECU.
    4. Check the VSC OFF indicator light.

      OK 

      INDICATOR LIGHT SWITCH CONDITION CHART

      VSCW - GND Condition Illumination Condition
      Connecting ON
      Disconnecting OFF
    5. Turn the ignition switch to OFF.
    6. Reconnect the skid control ECU connector.

    OK: REPLACE MASTER CYLINDER SOLENOID 

    Fig 1: Identifying Skid Control ECU Connector
    G05199316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
    1. Disconnect the skid control ECU connector.
    2. Disconnect the combination meter connector.
    3. Measure the resistance.

      Standard 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S1-34 (IND) - C9-37 Below 1 Ω
      S1-34 (IND) - Body ground 10 kΩ or higher
    4. Reconnect the combination meter connector.
    5. Reconnect the skid control ECU connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying Combination Meter & Skid Control ECU Connectors
    G05199317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  3. INSPECT COMBINATION METER ASSEMBLY 
    1. Check the combination meter system. (See COMBINATION METER ).

      OK: Combination meter is normal. 

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK: Go to Next Step 

  4. INSPECT SKID CONTROL ECU 
    1. Disconnect the skid control ECU connector.
    2. Ground terminal CSW of the skid control ECU.

      Standard 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      S1-34 (CSW) - Body ground VSC OFF switch not pushed in 10 kΩ or higher
    3. Reconnect the skid control ECU connector.

    OK: REPLACE MASTER CYLINDER SOLENOID 

    Fig 3: Identifying Skid Control ECU Connector
    G05199309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to Next Step 

  5. INSPECT VSC OFF SWITCH 
    1. Remove the VSC OFF switch.
    2. Disconnect the VSC OFF switch connector.
    3. Measure the resistance.

      Standard 

      RESISTANCE SPECIFICATION

      Tester Connection Switch Condition Specified Condition
      T17-3-T17-4 Released 10 kΩ or higher
      T17-3-T17-4 Pushed in Below 1 Ω
    4. Reconnect the VSC OFF switch connector.
    5. Reinstall the VSC OFF switch.
      Fig 4: Inspecting VSC Off Switch
      G05199310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE VSC OFF SWITCH 

    OK: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR (VSC OFF SWITCH CIRCUIT) 
    1. Disconnect the skid control ECU connector and the VSC OFF switch connector.
    2. Measure the resistance.

      Standard 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S1-43 (CSW) - T17-3 Below 1 Ω
      S1-43 (CSW) - Body ground 10 kΩ or higher
      T17-4 - Body ground Below 1 Ω
    3. Reconnect the skid control ECU connector and the VSC OFF switch connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 5: Identifying Skid Control ECU & VSC Off Switch Connectors
    G05199320Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE MASTER CYLINDER SOLENOID 

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