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Mass Air Flow Meter: Inspection: Inspection

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  1. INSPECT MASS AIR FLOW METER 
    1. Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.
      Fig 1: Inspecting Mass Air Flow Meter
      GTY303975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Platinum Hot Wire (Heater)

      OK

      There is no foreign matter.

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

    2. Measure the resistance according to the value(s) in the table below.
      Fig 2: Measuring Mass Air Flow Meter Resistance
      GTY297351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Mass Air Flow Meter)

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (THA) - 2 (E2) -20°C (-4°F) 13.6 to 18.4 kΩ
      1 (THA) - 2 (E2) 20°C (68°F) 2.21 to 2.69 kΩ
      1 (THA) - 2 (E2) 60°C (140°F) 0.49 to 0.67 kΩ

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