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Home >> Jeep >> 2005 >> Wrangler Rubicon, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 497 (HVAC Systems) >> Controls >> A/C Compressor Clutch >> Diagnosis And Testing >> A/C Compressor Clutch Coil >> Preliminary Checks

Preliminary Checks

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
  1. If no diagnostic trouble codes (DTCs) are found in the powertrain control module (PCM) or the engine control module (ECM) (depending on engine application), go to step  2. If any DTCs are found, repair as required.
  2. If the A/C compressor clutch still will not engage, verify the refrigerant charge level (Refer to HEATING & AIR CONDITIONING/PLUMBING - DIAGNOSIS AND TESTING - REFRIGERANT SYSTEM LEAKS) . If the refrigerant charge level is OK, go to step  3. If the refrigerant charge level is not OK, adjust the refrigerant charge as required.
  3. On models equipped with the 2.4L or 3.7L gasoline engine, if the A/C compressor clutch still will not engage, disconnect the wire harness connector from the A/C pressure transducer and check for battery current at the connector with the engine running and the A/C-heater control set to the A/C mode. If OK, go to TESTS . If not OK, refer to the BODY DIAGNOSTIC PROCEDURES to perform further diagnosis. On models equipped with the 2.8L diesel engine, go to TESTS .
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