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Airflow Meter/Sensor Inspection

Inspect airflow meter for damage and ensure measuring plate moves smoothly. See Fig 1 . Disconnect airflow meter connector. Move measuring plate and measure resistance between terminals. See AIRFLOW METER TERMINAL RESISTANCE  table.

AIRFLOW SENSOR TERMINAL VOLTAGES

Terminal Wire Color Volts - Ignition ON Volts - Engine Running
Black/Yellow (Power Supply) 12 12
Green/Orange (Burn-Off) 0 0
Green/Black (Airflow Mass) 1.0-2.0 1.9-5.0
Green/Yellow (Ground) About 0 About 0
Black/Orange (Ground) About 0 About 0
AIRFLOW METER TERMINAL RESISTANCE

Terminals Ohms - Fully Closed Ohms - Fully Open
E2-Vs 100-400 20-1000
E2-Vc 100-400 100-400
E2-Vb 200-400 200-400
E2-THA (1) 13,600-18,400 (1) 13,600-18,400
(2) 2200-2700 (2) 2200-2700
(3) 500-700 (3) 500-700
E1-Fc Infinite 0
(1) Tested at -4°F (-20°C).
(2) Tested at 68°F (20°C).
(3) Tested at 140°F (60°C).
Fig 1: Airflow Meter & Connector
G117768Courtesy of MAZDA MOTORS CORP.
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