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Airflow Meter

  1. Turn ignition off. Disconnect the airflow meter connector. Using a DVOM, measure resistance between the appropriate airflow meter terminals. See Fig 1. For resistance specifications, refer to the AIRFLOW METER RESISTANCE  table.
    AIRFLOW METER RESISTANCE

    Terminals Ohms °F (°C)
    VS & E2 200-600 N/A
    VC & E2 200-400 N/A
    THA & E2 10,000-20,000 -4 (-20)
    THA & E2 4000-7000 32 (0)
    THA & E2 2000-3000 68 (20)
    THA & E2 900-1300 104 (40)
    THA & E2 400-700 140 (60)
    FC & E1 Infinity N/A
    Fig 1: Identifying ES250 Airflow Meter Terminals
    G90J18852Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Using a DVOM, measure resistance between airflow meter terminals while moving airflow measuring plate inside airflow meter. For specifications, see AIRFLOW METER MEASURING PLATE RESISTANCE  table. See Fig 1.
AIRFLOW METER MEASURING PLATE RESISTANCE

Terminals Ohms Measuring Plate Position
FC & E1 Infinity Fully Closed
FC & E1 Zero Other Than Closed
VS & E2 200-600 Fully Closed
VS & E2 (1) 20-1000 Fully Open
(1) Resistance will change in a wave pattern as measuring plate is opened.
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