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Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONFIRM ENGINE MODELS 
    1. Confirm the engine model.
      ENGINE MODEL

      3MZ-FE A
      2AZ-FE /B
    1. B: Go to step   6 
    2. A: Go to Next Step. 
  2. READ VALUE OF HAND-HELD TESTER (VEHICLE SPEED SIGNAL) 

    HINT:

    Start the inspection from step  2 when using the hand-held tester and start from step  3 when not using the hand-held tester.

    1. Operate the hand-held tester according to the steps on the display and select "DATA LIST".

      ABS: 

      ABS SPECIFICATION

      Item Measurement Item/Range (Display) Normal Condition Diagnostic Note
      SPD1 Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost the same as the actual vehicle speed (When driving) -

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

    1. NG: GO TO BRAKE CONTROL SYSTEM (SEE  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
    2. OK: Go to Next Step. 
  3. INSPECT COMBINATION METER ASSY 

    INSPECTION USING OSCILLOSCOPE 

    1. Check the input signal waveform.
      1. Remove the combination meter assy.
      2. Connect the oscilloscope to terminal C7-35 and body ground.
        Fig 1: Connecting Oscilloscope To Terminal C7-35 & Body Ground
        G03049718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Start the engine.
      4. Check the signal waveform according to the condition(s) in SPECIFIED CONDITION  .
        SPECIFIED CONDITION

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

        OK: As shown in  Fig 2 

        HINT:

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

        Fig 2: Identifying Signal Waveform
        G03049719Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        SPECIFIED CONDITION

        OK A
        NG (w/ VSC) B
        NG (w/ ABS) C
    1. B: Go to step   4 
    2. C: Go to step   5 
    3. A: REPLACE COMBINATION METER ASSY (SEE  OVERHAUL  ) 
  4. CHECK HARNESS AND CONNECTOR (BETWEEN ABS & TRACTION ACTUATOR ASSY AND COMBINATION METER ASSY) (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the C7 and S1 connectors.
    2. Measure the resistance according to the value(s) in SPECIFIED CONDITION  .

      Standard: 

      SPECIFIED CONDITION

      Item Condition
      Tool setting 5/DIV, 20 ms/DIV
      Vehicle condition Driving at approx. 20 km/h (12 mph)
      Fig 3: Checking Between ABS & Traction Actuator Assy & Combination Meter Assy
      G03049720Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO BRAKE CONTROL SYSTEM (SEE  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
  5. CHECK HARNESS AND CONNECTOR (BETWEEN BRAKE ACTUATOR ASSY AND COMBINATION METER ASSY) (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the C7 and S2 connectors.
    2. Measure the resistance according to the value(s) in SPECIFIED CONDITION  .

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      C7-35 - S1-23 Below 1 Ω
      C7-35 - Body ground 10 kΩ or higher
      Fig 4: Checking Between Brake Actuator Assy & Combination Meter Assy
      G03049721Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: GO TO BRAKE CONTROL SYSTEM (SEE  CUSTOMER PROBLEM ANALYSIS CHECK  ) 
  6. INSPECT COMBINATION METER ASSY 

    INSPECTION USING OSCILLOSCOPE 

    1. Check the input signal waveform.
      1. Remove the combination meter assy.
      2. Connect the oscilloscope to terminal C7-35 and body ground.
        Fig 5: Connecting Oscilloscope To Terminal C7-35 & Body Ground
        G03049722Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Start the engine.
      4. Check the signal waveform according to the condition(s) in SPECIFIED CONDITION  .
      SPECIFIED CONDITION

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

      OK: As shown in  Fig 6 

      HINT:

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

      Fig 6: Identifying Signal Waveform
      G03049723Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Go to step   7 
    2. OK: REPLACE COMBINATION METER ASSY (SEE  OVERHAUL  ) 
  7. INSPECT COMBINATION METER ASSY 
    1. Measure the resistance according to the value(s) in SPECIFIED CONDITION  .

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      C7-19 - Body ground Below 1 Ω
      Fig 7: Inspecting Combination Meter Assy
      G03049724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE COMBINATION METER ASSY (SEE  OVERHAUL  ) 
    2. OK: Go to Next Step. 
  8. CHECK HARNESS AND CONNECTOR (BETWEEN SPEEDOMETER SENSOR AND COMBINATION METER ASSY) (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
    1. Disconnect the C7 and V1 connectors.
    2. Measure the resistance according to the value(s) in SPECIFIED CONDITION  .

      Standard: 

      SPECIFIED CONDITION

      Tester Connection Specified Condition
      C7-35 - V1-3 Below 1 Ω
      C7-19 - V1-2 Below 1
      C7-35 - Body ground 10 kΩ or higher
    3. Measure the voltage according to the value(s) in SPECIFIED CONDITION  .

      Standard: 

      SPECIFIED CONDITION

      Signal Condition Condition Specified Condition
      V1-1 - Body ground Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      Fig 8: Measuring Between Speedometer Sensor & Combination Meter Assy
      G03049725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (VEHICLE SPEED SENSOR - PASSENGER SIDE J/B) 
    2. OK: REPLACE COMBINATION METER ASSY (SEE  OVERHAUL  ) 
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