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Home >> Subaru >> 1989 >> RX Automatic >> Repair and Diagnosis >> Engine Performance >> Sensor Range Charts >> Sensor Operating Range Charts >> Engine Sensors >> Airflow Meter

Airflow Meter

NOTE: DO NOT  start engine during this test. Place the ignition switch in the "OFF" or "ON" position as indicated.
AIRFLOW METER RESISTANCE

Ign. Switch Position Wire Colors Readings
SPFI
Off Black-Ground 0-10 Ohms
On Red-Ground 10 Volts Min.
On White-Black (1) .1-.5 Volts
MPFI Non-Turbo
Off Black-Ground 0-10 Ohms
Off Brown-Ground 0-10 Ohms
On Red-Ground 10 Volts Min.
On White-Brown (1) 1-2 Volts
MPFI Turbo
Off Black-Ground 0-10 Ohms
Off Brown-Ground 0-10 Ohms
On No. 2-Ground 10 Volts Min.
On No. 5-Brown (1) 1-2 Volts
(1) Voltage should be higher when blowing air from air cleaner side.
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