Explorer 2WD V6-245 4.0L VIN X SFI (1999)
Compressor Clutch Relay: Description and Operation
Wide Open Throttle A/C Cut-Off
CCRM Applications
For this application the wide open throttle A/C cutoff relay (may be referred to as the A/C relay) is normally open. There is no direct electrical
connection between the A/C switch or EATC Module and the A/C clutch. The PCM will receive a signal indicating that A/C is requested. When
A/C is requested, the PCM will check other A/C related inputs that are available (such as ACP (SW), ACCS). If these inputs indicate A/C
operation is OK (such as coolant temperature, engine rpm, throttle position), the PCM will ground the WAC output, closing the relay contacts and
sending voltage to the A/C clutch.