A/C Signal: Testing and Inspection

A Tech 1 scan tool is used to diagnose the system, it has the ability to display the A/C request input to the instrument panel cluster, as well as displaying when the Powertrain Control Module has commanded the A/C clutch "ON," and display A/C refrigerant pressure sensor input voltage. Chart C-10 A/C Clutch Control should be used for diagnosing the electrical portion of the A/C circuit. Chart C-10 A/C Clutch Control Circuit Diagnosis