Firebird V8-350 5.7L VIN P SFI (1996)
A/C Signal: Description and Operation
A/C Request Signal
The A/C request circuit signals the PCM when an A/C mode is selected at the A/C control head. The PCM uses this information enable the A/C
compressor clutch and 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.