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Inspection Procedure

NOTE: When replacing the master cylinder solenoid, perform zero point calibration (See CALIBRATION  ).
  1. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED 
    1. Check the skid control ECU connector's connecting condition.

      OK: The connector is securely connected. 

    NG: CONNECT CONNECTOR TO ECU CORRECTLY 

    OK: Go to next step 

  2. INSPECT BATTERY 
    1. Check the battery voltage.

      Standard voltage: 

      11 to 14 V 

    NG: INSPECT CHARGING SYSTEM 

    OK: Go to next step 

  3. INSPECT SKID CONTROL ECU (IG1 TERMINAL) 
    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 voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      S37-46 (IG1) - Body ground Ignition switch ON 10 to 14 V

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

    Fig 1: Identifying S37 Skid Control ECU Connector
    G05262773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  4. INSPECT SKID CONTROL ECU (GND TERMINAL) 
    1. Disconnect the skid control ECU (S38) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      S37-1 (GND1) - Body ground Below 1 Ω
      S37-32 (GND2) - Body ground Below 1 Ω
      S38-4 (GND3) - Body ground Below 1 Ω

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

    Fig 2: Inspecting Skid Control ECU (GND Terminal)
    G05262764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  5. 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 SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      S37-29 (WA) - C10-10 Below 1 Ω
      S37-29 (WA) - Body ground 10 kΩ or higher

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

    Fig 3: Checking Harness And Connector (Skid Control ECU - Combination Meter)
    G05262765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to next step 

  6. 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 

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