Schematic Reference: HVAC Schematics

Connector End View Reference: HVAC Connector End Views

DEFINITION: The A/C compressor clutch will not disengage when an A/C request has not been made and a Powertrain DTC has not been set.

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Start the engine.
2. Place the A/C request switch in the OFF position.

Is the A/C compressor clutch still engaged?

Go to Step 3

Go to Testing for Intermittent Conditions and Poor Connections

1. Turn OFF the ignition.
2. Disconnect the A/C compressor clutch.
3. Turn ON the ignition, with the engine OFF.
4. Probe the supply voltage circuit of the A/C compressor clutch with a test lamp that is connected to ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 6

Test the supply voltage circuit of the A/C compressor clutch for a short to voltage. Refer to Circuit Testing and Wiring Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 5

Inspect for poor connections at the A/C compressor clutch relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 7

Inspect for poor connections at the harness connector of the A/C compressor clutch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs.

Did you find and correct the condition?

Go to Step 9

Go to Step 8

Replace the A/C compressor clutch relay. Refer to Relay Replacement.

Did you complete the replacement?

Go to Step 9

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Replace the A/C compressor. Refer to Air Conditioning Compressor Replacement.

Did you complete the replacement?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3