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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.
Retrieve any continuous memory, KOEO and KOER DTCs.
Are there any DTCs displayed?
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Yes
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DTC is displayed:
Go to appropriate DTC test.
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No
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No DTC is displayed:
Go to next step.
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2
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Disconnect A/C compressor connector.
Start engine and turn A/C switch on.
Is there correct voltage at terminal of A/C compressor magnetic clutch connector?
Specification
More than 10.5 V
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Yes
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Inspect for GND condition of magnetic clutch on A/C compressor.
If GND condition is okay, inspect for open circuit magnetic clutch coil.
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No
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Go to next step.
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3
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Disconnect 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.
Connect WDS or equivalent to DLC-2.
Access ACSW PID.
Turn ignition switch to ON position.
Turn A/C switch on and set blower fan at any speed.
Does ACSW PID read ON?
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Yes
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Inspect refrigerant pressure switch operation.
If switch is okay, go to next step.
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No
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Inspect for following:
• A/C switch is stuck open.
• Open circuit between refrigerant pressure switch and PCM terminal 1AC
• Open circuit of 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 for stuck open A/C relay.
Replace if necessary.
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No
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Inspect following and repair or replace as necessary:
• Refrigerant charging amount
• A/C compressor for being seized
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5
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Verify test results.
• If okay, return to diagnostic index to service any additional symptoms.
• If malfunction remains, replace PCM.
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