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3. (C27) A/C COMPRESSOR CONTROL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Powertrain Control Module (PCM) connector. Measure the resistance between ground and the (C27) A/C Compressor Is the resistance below 100 ohms? Yes >> Repair the (C27) A/C Compressor Control circuit for a short to ground. Perform the PCM Verification Test Ver. 1 (Refer to 9 - No >> Go to 4 4. (C27) A/C COMPRESSOR CONTROL CIRCUIT OPEN OR HIGH RESISTANCE Measure the resistance of the (C27) A/C Compressor Control circuit Is the resistance below 5.0 ohms? Yes >> Go to 5 No >> Repair the (C27) A/C Compressor Control circuit for an open circuit or high resistance. Perform the PCM Verification Test Ver. 1 (Refer to 9 - 5. A/C COMPRESSOR Connect the Powertrain Control Module (PCM) connector. Turn the ignition on. With the scan tool, actuate the A/C Compressor control to the ON posi- Using a 12 volt test light connected to ground, check the (C27) A/C NOTE: The test light should be illuminated and bright. Compare Using a 12 volt test light connected to ground, check the (C27) A/C NOTE: The test light should not be illuminated. Is the test light illuminated and bright with the actuation ON (100%) and not illuminated with the actua- PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 587 |