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Inspection Procedure

  1. SYSTEM CHECK 
    SYSTEM CHECK

    with ABS, with VSC A
    without ABS B

    B: Go to step  3

    A: GO TO NEXT STEP 

  2. READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED SIGNAL) 
    1. Operate the intelligent tester according to the steps on the display and select "DATA LIST".

      ABS/VSC/TRAC: 

      ABS/VSC/TRAC (VEHICLE SPEED SIGNAL)

      Item Measurement Item / Range (Display) Normal Condition Diagnostic Note
      (FR/FL/RR/RL) WHEEL SPEED Vehicle speed / Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost same as actual speed (When driving) -

      OK: Vehicle speed displayed on the tester is almost the same as the actual vehicle speed. 

    NG: GO TO BRAKE CONTROL SYSTEM 

    OK: GO TO NEXT STEP 

  3. INSPECT COMBINATION METER ASSEMBLY 
    1. Check the input signal waveform.
      1. Remove the combination meter with connectors still connected.
      2. Connect the oscilloscope to terminal C11-18 and body ground.
        Fig 1: Connecting Oscilloscope To Terminal C11-18 And Body Ground
        G04466601Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Start the engine.
      4. Check the signal waveform according to the condition(s) in COMBINATION METER ASSEMBLY  .
        COMBINATION METER ASSEMBLY

        Item Condition
        Tool setting 5 V/DIV., 20 ms/DIV.
        Vehicle condition Driving at approx. 20 km/h (12 mph)

        OK: The waveform is displayed as shown in the illustration. 

        HINT:

        As the vehicle speed increases, the cycle of the signal waveform narrows.

        Fig 2: Identifying Signal Waveform
        G04466602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        RESULT OF COMBINATION METER ASSEMBLY

        OK A
        NG (with ABS, without VSC) B
        NG (with VSC) C
        NG (without ABS) D

    B: Go to step 4 

    C: Go to step  6

    D: Go to step  8

    A: REPLACE COMBINATION METER ASSEMBLY 

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - BRAKE ACTUATOR ASSEMBLY) 
    1. Disconnect the C11 and S1 connectors.
    2. Measure the resistance according to the value(s) in COMBINATION METER - BRAKE ACTUATOR ASSEMBLY  .

      Standard resistance 

      COMBINATION METER - BRAKE ACTUATOR ASSEMBLY

      Tester connection Condition Specified condition
      C11-18 - Body ground Always 10 kΩ or higher
      C11-18 - S1-12 Always Below 1 Ω
      Fig 3: Checking Harness And Connector (Combination Meter - Brake Actuator Assembly)
      G04466603Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  5. INSPECT BRAKE ACTUATOR ASSEMBLY 
    1. Disconnect the S1 connector.
    2. Measure the voltage according to the value(s) in BRAKE ACTUATOR ASSEMBLY (VOLTAGE)  .

      Standard voltage 

      BRAKE ACTUATOR ASSEMBLY (VOLTAGE)

      Tester connection Condition Specified condition
      S1-12 - Body ground Ignition switch ON 10 to 14 V
    3. Measure the resistance according to the value(s) in BRAKE ACTUATOR ASSEMBLY (RESISTANCE)  .

      Standard resistance 

      BRAKE ACTUATOR ASSEMBLY (RESISTANCE)

      Tester connection Condition Specified condition
      S1-1 - Body ground Always Below 1 Ω
      Fig 4: Identifying Brake Actuator Assembly
      G04466604Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE COMBINATION METER ASSEMBLY 

    OK: REPLACE BRAKE ACTUATOR ASSEMBLY 

  6. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ABS & TRACTION ACTUATOR ASSEMBLY) 
    1. Disconnect the C11 and S1 connectors.
    2. Measure the resistance according to the value(s) in COMBINATION METER - ABS & TRACTION ACTUATOR ASSEMBLY  .

      Standard resistance 

      COMBINATION METER - ABS & TRACTION ACTUATOR ASSEMBLY

      Tester connection Condition Specified condition
      C11-18 - Body ground Always 10 kΩ or higher
      C11-18 - S1-18 Always Below 1 Ω
      Fig 5: Checking Harness And Connector (Combination Meter - ABS & Traction Actuator Assembly)
      G04466605Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  7. INSPECT ABS & TRACTION ACTUATOR ASSEMBLY 
    1. Disconnect the S1 connector.
    2. Measure the voltage according to the value(s) in ABS & TRACTION ACTUATOR ASSEMBLY (VOLTAGE)  .

      Standard voltage 

      ABS & TRACTION ACTUATOR ASSEMBLY (VOLTAGE)

      Tester connection Condition Specified condition
      S1-18 - Body ground Ignition switch ON 10 to 14 V
    3. Measure the resistance according to the value(s) in ABS & TRACTION ACTUATOR ASSEMBLY (RESISTANCE)  .

      Standard resistance 

      ABS & TRACTION ACTUATOR ASSEMBLY (RESISTANCE)

      Tester connection Condition Specified condition
      S1-32 - Body ground Always Below 1 Ω
      Fig 6: Inspecting ABS & Traction Actuator Assembly
      G04466606Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE BRAKE ACTUATOR ASSEMBLY 

    OK: REPLACE ABS & TRACTION ACTUATOR ASSEMBLY 

  8. INSPECT SPEEDOMETER SENSOR 
    1. Check voltage.
      1. Shift the shift lever to neutral.
      2. Jack up either of the front wheel.
      3. Turn the ignition switch to ON.
      4. Measure voltage between terminals 2 and 3 of speed sensor when the front wheel is turning slowly.

        Standard voltage: Voltage is generated intermittently. 

      Fig 7: Inspecting Speedometer Sensor (1 Of 2)
      G04466607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 8: Inspecting Speedometer Sensor (2 Of 2)
      G04466608Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SPEEDOMETER SENSOR 

    OK: REPLACE HARNESS OR CONNECTOR (SPEEDOMETER SENSOR CIRCUIT) 

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