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Airflow Meter

Turn ignition off. Disconnect wiring connector from airflow meter. Using an ohmmeter, measure resistance between each terminal. See Fig 1. If resistance values do not meet specifications shown in chart, replace airflow meter.

Fig 1: Measuring Airflow Meter Resistance
G42912Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
AIRFLOW METER RESISTANCE SPECIFICATIONS

Terminals Condition Ohms
E1 - Fc Flap Closed Infinity
" Flap Open Zero
E2 - THA 4°F (-20°C) 10,000-20,000
" 32°F (0°C) 4000-7000
" 68°F (20°C) 2000-3000
" 104°F (40°C) 900-1300
" 140°F (60°C) 400-700
E2 - Vb N/A 200-400
E2 - Vc N/A 200-400
E2 - Vs Flap Closed 20-400
" Flap Open (1) 20-1000
(1) Resistance changes with flap position.