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Compressor Speed Sensor: Description and Operation

SPEED SENSOR -G111

- Inductive sensor (4 pulses per compressor rotation)
- Provides an A/C compressor speed signal; the A/C clutch control module (manually controlled A/C) or A/C control head (automatic climate control) compares A/C compressor speed to engine speed, calculates belt slippage (percentage) and switches the A/C compressor off if slippage is too large (if, for example, the belt is too loose)