Impreza RS Coupe AWD F4-2.5L SOHC (1999)
Compressor Clutch Relay: Description and Operation
Compressor Clutch "ON" Delay System
When air conditioning system relay operates, a signal is entered into engine control unit. Engine control unit then judges engine operation and activates
A/C cut relay. Maximum clutch "ON" delay occurs 0.8 seconds after A/C cut relay activates.