Diagnostic procedure

A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Connect WDS or equivalent to DLC-2. Turn ignition key to ON (Engine OFF). Retrieve any DTC. Is "PASSED" displayed?	Yes	No DTC is displayed: Go to next step.
1		No	DTC is displayed: Go to appropriate DTC test.
2	Start engine and run it at idle. Turn A/C switch on. Remove A/C relay. Does A/C magnetic clutch disengage?	Yes	Inspect for following: A/C relay is stuck closed. Short to GND circuit between A/C relay and PCM terminal 47 If both items are okay, go to next step.
2		No	Inspect if circuit between A/C relay and magnetic clutch shorts to battery power circuit. If circuit is okay, inspect magnetic clutch stuck engagement or clearance.
3	Disconnect refrigerant pressure switch connector. Start the engine and turn A/C switch on. NOTE: A/C should not work when the connector disconnected. If A/C remains working, short to GND circuit may be present. Does A/C remain working?	Yes	Inspect for short to GND circuit between refrigerant pressure switch and PCM terminal 5.
3		No	Go to next step.
4	Reconnect refrigerant pressure switch connector. Turn off A/C switch. NOTE: A/C should not work when the A/C switch is turned off. If A/C remains working, short to GND circuit may be present. Does A/C remain working?	Yes	Inspect for following: Short to GND circuit between A/C switch and A/C amplifier Short to GND circuit between A/C amplifier and refrigerant pressure switch
4		No	Inspect for stuck closed A/C switch.
5	Verify test results. If okay, return to diagnostic index to service any additional symptoms. If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram PCM.