Calais V6-3300 3.3L MFI VIN N (1990)
Compressor Clutch Relay: Description and Operation
The ECM controls the A/C compressor clutch relay. When the A/C is turned on, the ECM delays the clutch engagement of the A/C compressor to allow
the IAC valve to raise the engine idle speed to compensate for the added load. The ECM also causes the relay to disengage the A/C clutch at wide open
throttle, engine overheating and high pressure power steering pump loads, if a Power Steering Pressure Switch (PSPS) is used on the engine.
