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Mass Air Flow Meter: Inspection: Inspection

  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: Identifying Platinum Hot Wire (Heater)
      GTY278360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      There is no foreign matter.

      TEXT IN ILLUSTRATION

      *1 Platinum Hot Wire (Heater)

      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: Platinum Hot Wire (Heater)
      GTY350551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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
      TEXT IN ILLUSTRATION

      *a Mass Air Flow Meter

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