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Home >> Subaru >> 1987 >> DL 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Fuel Injection System - BOSCH AFC >> Testing >> Airflow Meter Potentiometer
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Airflow Meter Potentiometer

Remove rubber cover from electrical connector on airflow meter. Leave connector connected. Connect volt/ohmmeter between terminals and note readings. See SUBARU AIRFLOW METER RESISTANCE  table. If readings are not to specifications, check fuse, ignition relay, wiring or replace airflow meter.

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

Ign. Sw. Wire Colors Readings
Off Black-Ground 0-10 Ohms
Off Brown-Ground 0-10 Ohms
On Red-Brown 10-12 Volts
On White-Brown 1-2 Volts
On White-Brown (1) 2-10 Volts
(1) Measure voltage while blowing into inlet side of airflow meter.
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