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STEP
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INSPECTION
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RESULTS
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ACTION
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1
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• Connect WDS or equivalent to DLC-2.
• Turn key to ON (Engine OFF).
• Retrieve any DTC.
• Is "PASSED" displayed?
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Yes
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No DTC is displayed:
• Go to the next step.
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No
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DTC is displayed:
• Go to appropriate DTC test.
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2
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• Start engine and run it at idle.
• Turn A/C switch on.
• Remove A/C relay.
• Does A/C magnetic clutch disengage?
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Yes
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Inspect for following:
• A/C relay is stuck closed.
• Short to GND circuit between A/C relay and PCM terminal 69 (R.H.D.)/C-25 (L.H.D.)
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- If both items are okay, go to the next step.
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No
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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.
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3
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• Disconnect refrigerant pressure switch connector.
• Start the engine and turn A/C switch on.
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Note
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• 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?
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Yes
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Inspect for short to GND circuit between refrigerant pressure switch and PCM terminal 41 (R.H.D.)/C-15 (L.H.D.).
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No
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Go to the next step.
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4
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• Reconnect refrigerant pressure switch connector.
• Turn off A/C switch.
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Note
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• 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?
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Yes
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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
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No
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Inspect for stuck closed A/C switch.
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5
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• Verify test results.
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- If okay, return to diagnostic index to service any additional symptoms.
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- If malfunction remains, inspect related Service Information and perform repair or diagnosis.
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• If vehicle is repaired, troubleshooting completed.
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• If vehicle is not repaired or additional diagnostic information is not available, replace PCM.
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