A/C Always On And A/C Compressor Runs Continuously

PINPOINT TEST 20 A/C ALWAYS ON AND A/C COMPRESSOR RUNS CONTINUOUSLY DESCRIPTION

PINPOINT TEST 20	A/C ALWAYS ON AND A/C COMPRESSOR RUNS CONTINUOUSLY
DESCRIPTION	A/C compressor clutch does not disengage

PINPOINT TEST 20 A/C ALWAYS ON AND A/C COMPRESSOR RUNS CONTINUOUSLY INSPECTION & ACTION

PINPOINT TEST 20		A/C ALWAYS ON AND A/C COMPRESSOR RUNS CONTINUOUSLY
STEP	INSPECTION		ACTION
1	PRELIMINARY CHECKS Perform the following preliminary checks: A/C wiring (shorts) A/C and heater controls A/C system and compressor Are all checks OK?	Yes	Go to next step.
1		No	Service as required. Verify symptom no longer exists.
2	CHECK FOR VOLTAGE AT A/C CLUTCH WITH A/C OFF A/C and defroster OFF. Disconnect A/C clutch field connector 0740-203. Connect a multimeter between the power pin 1, circuit GY/W and ground pin 2, circuit B at the A/C clutch field connector 0740-203. Start engine. Monitor voltage. After testing, turn key OFF and reconnect A/C clutch field connector 0740-203. Was voltage less than 2.0 volts?	Yes	The electrical portion of the A/C system is not at fault. See SYMPTOM TROUBLESHOOTING CHART - CLIMATE CONTROL for further diagnosis.
2		No	A fault is indicated in the A/C electrical system. Go to next step.
3	CHECK ACCS INPUT TO PCM WITH A/C OFF Key OFF. Connect WDS or equivalent tester. Start engine. A/C and defrost off. Access ACCS PID. Is ACCS PID "OFF"?	Yes	Go to next step.
3		No	Key OFF. Go to step 2 of A/C CONTROL SIGNAL (ACCS) MALFUNCTION .
4	PERFORM KOEO SELF-TEST AND RETRIEVE ANY CONTINUOUS MEMORY DTCs Perform PCM quick test / See PCM QUICK TEST . Are any DTCs displayed during continuous memory or key on, engine off (KOEO) self tests?	Yes	Check for cause. See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - POWERTRAIN CONTROL MODULE (PCM) .
4		No	Go to next step.
5	Verify test results. If OK, see SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITY to service any additional symptoms.
Courtesy of MAZDA MOTORS CORP.