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Inspection Procedure

NOTE: If the vehicle speed is outside the allowable range when tested, perform the following procedure (see ON-VEHICLE INSPECTION ).
  1. SYSTEM CHECK 

    Result 

    RESULT CHART

    Vehicle Type Proceed to
    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. Warm up the engine.
    2. Ignition switch off.
    3. Connect the intelligent tester to the DLC3.
    4. Ignition switch ON.
    5. Turn the tester ON.
    6. Enter following menus: DIAGNOSIS / OBD/MOBD / ABS/TRAC/VSC / DATA LIST.
    7. Check values by referring to the table below.

      ABS/TRAC/VSC: 

      NORMAL CONDITION CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      FR/FL/RR/RL WHEEL SPD 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 C9-9 and body ground.
      3. Start the engine.
        Fig 1: Inspecting Combination Meter Assembly
        G05196075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Check the signal waveform according to the condition(s) in the table below.
        ITEM CONDITION CHART

        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 Oscilloscope Waveform
        G04966509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Result 

        RESULT CHART

        Result Proceed to
        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 C9 and S1 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      C9-9 - Body ground Always 10 kΩ or higher
      C9-9 - S1-18 Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Checking Harness And Connector (Combination Meter - Brake Actuator Assembly)
    G05196077Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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 the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      S1-1 - Body ground Always Below 1 Ω
    Fig 4: Inspecting Brake Actuator Assembly
    G05196078Courtesy 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 C9 and S1 connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      C9-9 - Body ground Always 10 kΩ or higher
      C9-9 - S1-12 Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 5: Checking Harness And Connector (Combination Meter - ABS & Traction Actuator Assembly)
    G05196079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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 the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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 the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester connection Condition Specified condition
      S1-32 - Body ground Always Below 1 Ω
    Fig 6: Inspecting ABS & Traction Actuator Assembly
    G05196080Courtesy 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. Ignition switch ON.
        Fig 7: Identifying Speedometer Sensor V1 Connector Terminals
        G05196081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Measure voltage between terminals 2 and 3 of speed sensor when the front wheel is turning slowly.

        Standard voltage: Voltage is generated intermittently. 

    NG: REPLACE SPEEDOMETER SENSOR 

    Fig 8: Voltage Graph
    G04965982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE HARNESS OR CONNECTOR (SPEEDOMETER SENSOR CIRCUIT) 

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