90CS Quattro V6-2.8L (AAH) (1994)
Compressor Speed Sensor: Testing and Inspection
Compressor Speed Sensor
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Switch ignition off.
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Disconnect harness connector from sensor -G111-.
Connector located in left-front of engine compartment
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Set digital multimeter (Fluke 83 or equivalent) to resistance measuring range (ohm).
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Connect multimeter to connector -A- between two terminals of sensor -G111-.
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Must be 1.0 - 1.5 K ohm
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Connect multimeter between Ground (GND) and each terminal of connector -A-.
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Must be infinite ohms (no continuity)