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Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. CHECK DTC 
    1. Check the DTCs (See DTC CHECK/CLEAR  ).

      Result 

      RESULT REFERENCE TABLE

      Condition Proceed to
      DTC is not output A
      DTC is output B

    B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

    A: Go To Next Step 

  2. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED 
    1. Check the skid control ECU connector's connecting condition.

      OK: The connector should be securely connected. 

    NG: CONNECT CONNECTOR TO ECU 

    OK: Go To Next Step 

  3. INSPECT BATTERY 
    1. Check the battery voltage.

      Standard voltage: 

    11 to 14 V 

    NG: INSPECT CHARGING SYSTEM 

    OK: Go To Next Step 

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - 4WD CONTROL ECU TRANSFER SHIFT ACTUATOR) (See  DTC C1380/64: STOP LIGHT CONTROL RELAY MALFUNCTION   ) 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go To Next Step 

  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH) 
    1. Connect the F10 ECU connector.
    2. Connect the T3 actuator connector.
    3. Disconnect the T19 switch connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      S28-43 (CSW) - T19-3 Always Below 1 Ω
      T19-3 - Body ground Always Below 1 Ω
      S28-43 (CSW) - Body ground Always 10 kΩ or higher
      Fig 1: Identifying Harness Connector (Skid Control ECU - VSC OFF Switch)
      G05556586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go To Next Step 

  6. INSPECT VSC OFF SWITCH 
    1. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      T19-3-T19-4 Switch is pushed in Below 1 Ω
      Switch is not pushed in 10 kΩ or higher
      Fig 2: Identifying Harness Connector (VSC OFF Switch)
      G05556646Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE VSC OFF SWITCH 

    OK: Go To Next Step 

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

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      S28-36 (VSCW) - C10-17 Always Below 1 Ω
      S28-36 (VSCW) - Body ground Always 10 kΩ or higher
      Fig 3: Identifying Harness Connector (Skid Control ECU - Combination Meter)
      G05556588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go To Next Step 

  8. INSPECT COMBINATION METER ASSEMBLY 
    1. Check the combination meter system (See HOW TO PROCEED WITH TROUBLESHOOTING ).

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )

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