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Mass Air Flow Meter: Inspection

WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT MASS AIR FLOW METER 
    1. Check the operation.
      1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
      2. Using a voltmeter, connect the positive (+) tester prove to terminal 3 (VG) and the negative (-) tester prove to terminal 2 (E2G).
      3. Blow air into the mass air flow meter and check that the voltage fluctuates.

        If the voltage does not fluctuate, replace the mass air flow meter.

        Fig 1: Inspecting Mass Air Flow Meter
        G05198388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard 

        TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

        Tester Connection Specified Condition
        4 (THA) - 5 (E2) 12.5 to 16.9 kΩ at -20°C (-4°F)
        4 (THA) - 5 (E2) 2.19 to 2.67 kΩ at 20°C (68°F)
        4 (THA) - 5 (E2) 0.50 to 0.68 kΩ at 60°C (140°F)

        If the result is not as specified, replace the mass air flow meter.

        Fig 2: Inspecting Mass Air Flow Meter
        G05677351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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