Grand Prix V6-191 3.1L VIN M SFI (1998)
A/C Signal: Description and Operation
A/C Request Signal
DESCRIPTION
This signal indicates to the PCM that an A/C mode is selected at the A/C control head. The PCM uses this information to adjust the idle speed before
turning on the A/C clutch. If this signal is not available to the PCM, the A/C compressor will be inoperative.
DIAGNOSIS
Refer to Computers and Control Systems / Testing and Inspection / Procedures / Diagnostic Tables / System Diagnostic Tables / A/C Compressor
Clutch Control Diagnosis for A/C clutch wiring diagrams and diagnosis of A/C clutch electrical system.
