Compressor Speed Sensor: Description and Operation

Refrigerant System (R-134a), Components

A/C Compressor Speed Sensor -G111-, (Zexel Compressors Only)







- Inductive sensor (4 pulses per compressor rotation)
- Determines A/C compressor speed; the A/C compressor clutch control module (Manual A/C) or the A/C control head (Automatic climate control) compares compressor speed to engine speed and calculates belt slippage (as a percentage) and switches compressor OFF if slippage is too large (for example, if belt is too loose.)


NOTE:
- A/C compressor speed sensor -G111- is not installed on Nippondenso compressors.
- A thermo-fuse is incorporated into the clutch coil of Nippondenso compressors. Current to the clutch coil is interrupted in the event of compressor overheating.