A/C Compressor Controls - Troubleshooting Procedures

COMPLAINT VERIFICATION
Go to "Functional Check of the Heating and Air Conditioning System" for a guide to normal operation. System Check of the Heating and Air Conditioning System

TROUBLESHOOTING
Perform the following checks before doing the System Diagnosis.
1. Check Fuse 20 by visual inspection.
2. Check that Compressor Clutch connector is firmly seated.

If OK:
Go to System Diagnosis for diagnostic tests.

SYSTEM DIAGNOSIS
Perform the tests listed for your symptom in the Symptom Table below.





Symptom Table





Test A: Low Pressure Cut-Out Switch Voltage Test





Test B: Compressor Clutch Voltage Test





Test C: A/C Select Switch Voltage Test





Test D: Idle Speed Control Unit Voltage Test