Preliminary Checks
- Using a scan tool, check for Diagnostic Trouble Codes (DTCs) in the HVAC module, Integrated Center Stack (ICS) module and PCM. If no DTCs are found, go to Step 2 . If any DTCs are found, repair as required. Refer to DTC INDEX .
- If the A/C clutch still will not engage, verify the refrigerant charge level by conducting the A/C Performance test. Refer to DIAGNOSIS AND TESTING . If the refrigerant charge level is OK, go to COIL RESISTANCE TEST and COIL CURRENT DRAW TEST. If the refrigerant charge level is not OK, adjust the refrigerant charge as required.