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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 >> VSC Warning Light Circuit (Remains On) >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assy, perform zero point calibration (see CALIBRATION ).
  1. CHECK DTC 
    1. Is DTC output for ABS and VSC?

    Result: 

    RESULT

    DTC is not output A
    DTC is output B

    B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 

    A: Go to next step. 

  2. INSPECT SKID CONTROL ECU CONNECTOR 
    1. Check the ECU connector's connecting condition.

    OK: The connector should be securely connected. 

    NG: CONNECT CONNECTOR TO ECU CORRECTLY 

    OK: Go to next step. 

  3. INSPECT BATTERY 
    1. Check the battery voltage.

    Standard: 

    Voltage: 11 to 14 V 

    NG: INSPECT CHARGING SYSTEM (SEE  ON-VEHICLE INSPECTION  ) 

    OK: Go to next step. 

  4. INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (IG1 TERMINAL) 

    WHEN USING HAND-HELD TESTER: 

    1. Connect the hand-held tester to the DLC3.
    2. Start the engine.
    3. Select the DATA LIST mode on the hand-held tester.
      Fig 1: Voltage Condition Chart
      G02663277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Check the voltage condition output from the ECU displayed on the hand-held tester.

    OK: "Normal" is displayed. 

    Fig 2: Inspecting Skid Control ECU Terminal Voltage (IG1 Terminal)
    G02663278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    WHEN NOT USING HAND-HELD TESTER: 

    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch to the ON position.
    3. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (1 OF 4)

      Tester Connection Condition Specified Condition
      S1-46 (IG1) - Body ground IG switch ON 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

    OK: Go to next step. 

  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
    1. Disconnect the skid control ECU connector and combination meter connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (2 OF 4)

      Tester Connection Specified Condition
      C18-1 - S1-36 (VSCW) Below 1 Ω
    3. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (3 OF 4)

      Tester Connection Specified Condition
      S1-36 (VSCW) - Body ground 10 kΩ or higher
      Fig 3: Checking Harness And Connector (Skid Control ECU - Combination Meter)
      G02663279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step. 

  6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND) 
    1. Disconnect the skid control ECU connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard: 

      TESTER CONNECTION SPECIFIED CONDITION (4 OF 4)

      Tester Connection Specified Condition
      S1-32 (GND1) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 4: Checking Harness And Connector (Skid Control ECU - Body Ground)
    G02663280Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step. 

  7. INSPECT COMBINATION METER ASSY 
    1. Check combination meter assy (see COMBINATION METER ).

    NG: CHECK COMBINATION METER ASSY (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 

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

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