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Home >> Porsche >> 1987 >> 944 Turbo L4-2479cc 2.5L SOHC Turbo >> Repair and Diagnosis >> Specifications >> Electrical Specifications >> Air Flow Meter/Sensor
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Air Flow Meter/Sensor

AIR FLOW SENSOR
Checks made with harness connected and Ignition ON.
Power supply
Resistance between terminals 3 & Grd. 4.5 - 5.5 volts
Air flow signal
Resistance between terminals 2 & Grd. 250 - 260 millivolts
Air flap at rest.
Resistance between terminals 2 & Grd. 4.60 volts
Air flap completely open.
Intake Air Temperature Sensor (Temperature Sensor I)
Checks made with harness disconnected and Ignition OFF.
Terminals 1 and 4 of air flow sensor:
Resistance @ 0°C approx. 4400 to 6800 ohms
Resistance @ 15-30°C approx. 1400 to 3600 ohms
Resistance @ 40°C approx. 1000 to 1300 ohms

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