A/C Signal: Testing and Inspection

A/C Request Circuit Diagnosis

Diagnostic Table
Diagnostic Table A/C Request Circuit Diagnosis should be used for diagnosing the A/C request circuit only. Refer to System Diagnosis / Procedures / Diagnostic Tables / System Diagnostic Tables. Testing and Inspection

Scan Tool Diagnosis
The GM Tech 1 scan tool will be used in diagnosing the system. The PCM has the ability to display the following parameters:

^ A/C request input to the PCM
^ A/C compressor status
^ A/C system pressure
^ A/C clutch "ON" or "OFF" status