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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (COMBINATION METER) 
    1. Operate the hand-held tester according to the steps on the display and perform the "ACTIVE TEST".
      HAND-HELD TESTER ACTIVE TEST DETAIL

      Item Test Details Diagnostic Note
      SPEED METER 0/40/80/120/160 Diagnostic Note
    1. NG: CHECK AND REPLACE COMBINATION METER ASSY 
    2. OK: GO TO NEXT STEP 
  2. READ VALUE OF HAND-HELD TESTER (COMBINATION METER) 
    1. Operate the hand-held tester according to the steps on the display and select "DATA LIST".
      HAND-HELD TESTER VALUE DETAIL

      Item Test Details Diagnostic Note
      SPEED METER Vehicle speed / Min.: 0 km/h, Max.: 255 km/h Almost same at the meter speed (When driving)
    1. NG: CHECK AND REPLACE COMBINATION METER ASSY 
    2. OK: GO TO NEXT STEP 
  3. READ VALUE OF HAND-HELD TESTER (SKID CONTROL ECU) 
    1. Operate the hand-held tester according to the steps on the display and select "DATA LIST".
      HAND-HELD TESTER VALUE DETAIL

      Item Test Details Diagnostic Note
      SPD1 Vehicle speed / Min.: 0 km/h, Max.: 255 km/h -
    1. NG: GO TO BRAKE SYSTEM 
    2. OK: GO TO NEXT STEP 
  4. INSPECT COMBINATION METER ASSY 

    (REFERENCE) INSPECTION USING OSCILLOSCOPE 

    1. Check the input signal waveform.
      1. Remove the combination meter assy.
      2. Connect the oscilloscope to the terminal C10-35 and C10-30 of the combination meter assy.
      3. Start the engine.
      4. Check the signal waveform.
      ITEM AND CONTENTS

      Item Contents
      Tool setting 5 V/ DIV, 20 ms/ DIV
      Vehicle condition Driving at approx. 20 Km/h
      Fig 1: Identifying Combination Meter Assy Connectors
      G02630514Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      As the vehicle speed becomes higher, the cycle of the signal waveform becomes shorter.

      Fig 2: Signal Waveform Graph
      G02630515Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: CHECK AND REPLACE COMBINATION METER ASSY 
    2. OK: GO TO NEXT STEP 
  5. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU ASSY AND COMBINATION METER ASSY) 
    1. Remove the combination meter.
    2. Disconnect the connector from skid control ECU.
    3. Check continuity between the terminal S3-12, 17 (SP1) of skid control ECU and the terminal C10-35 of the combination meter connector.

      Standard: Continuity. 

    1. NG: CHECK AND REPLACE SKID CONTROL ECU ASSY 
    2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 
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