P0645-A/C Clutch Relay Circuit
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
When Monitored: With the ignition on. Battery voltage greater than 10 volts. A/C Switch on.
Set Condition: An open or shorted condition is detected in the A/C clutch relay control circuit. The desired A/C state does not equal the actual A/C clutch relay state. Three good trips to clear the MIL.