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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 the WDS or equivalent to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
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Yes
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DTC is displayed:
Go to the appropriate DTC test.
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No
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No DTC is displayed:
Go to the next step.
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2
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Disconnect the A/C compressor connector.
Start the engine and turn the A/C switch on.
Is there correct voltage at terminal of A/C compressor magnetic clutch connector?
Specification
10.5 V or more
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Yes
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Inspect for the ground condition of magnetic clutch on A/C compressor.
If ground condition is normal, inspect for an open circuit magnetic clutch coil.
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No
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Go to the next step.
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3
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Disconnect the refrigerant pressure switch connector.
Connect jumper wire between terminals of A/C high-pressure switch connector.
Connect jumper wires between terminals of refrigerant pressure switch connector.
Turn the ignition switch to the ON position.
Turn A/C switch on and set blower fan to any speed.
Does A/C work?
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Yes
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Inspect the refrigerant pressure switch operation.
If switch is normal, go to the next step.
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No
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Inspect for the following:
• A/C switch is stuck open.
• Open circuit between refrigerant pressure switch and PCM terminal 1AC
• Open circuit between blower motor fan switch and resistor (if blower motor does not operate)
• Evaporator temperature sensor and A/C amplifier
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4
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Remove jumper wire from switch connector.
Reconnect connector to refrigerant pressure switch.
Start engine and turn A/C switch on.
Does fan operate?
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Yes
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Inspect the whether A/C relay is stuck open.
Replace if necessary.
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No
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Inspect the following and repair or replace if necessary:
• Refrigerant charging amount
• A/C compressor for seizure
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5
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Verify test results.
• If normal, return to the diagnostic index to service any additional symptoms.
• If a malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform the repair or diagnosis.
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- If the vehicle is repaired, troubleshooting is completed.
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- If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.le. Retest.
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