Compressor Speed Sensor: Description and Operation

Refrigerant Circuit Switches And Sensors And Related Connections

NOTE: Refer to vehicle-specific refrigerant circuit for switching pressures, switch removal/installation and switch layout/design Heating, air conditioning or Air conditioning.

A/C Compressor Speed Sensor G111







Inductive sensor

The sensor pulses (4 per compressor revolution) and the engine speed enable the A/C Control Head E87 or the Climatronic Control Module J255 to calculate belt slip.

If the belt slip exceeds a specified value, the compressor is switched off by the control module via the A/C clutch.

NOTE: The sensor is installed in Audi vehicles with compressor drive via poly V-belt and Zexel compressor.