Grand AM L4-144 2.4L DOHC VIN T SFI (1997)
Compressor Clutch Relay: Description and Operation
A/C COMPRESSOR CONTROL RELAY
The A/C compressor control relay is designed to disengage the A/C compressor clutch momentarily during start-up on a warm engine. The relay is
PCM controlled. Voltage is supplied from the A/C power feed circuit and the PCM completes the ground to close a set of normally opened points.
This turns the compressor clutch ON. The PCM opens the ground circuit when an engine run signal is sensed with coolant temperature at a specified
amount.
On a -warm engine start-up, a time delay of about 3 seconds allows the engine speed to stabilize before the compressor engages.
