Grand AM L4-138 2.3L DOHC VIN D MFI (1994)
A/C Signal: Description and Operation
A/C System Wiring.
PURPOSE
This signal indicates that the A/C control switch is turned "ON" and the pressure switch is closed.
OPERATION
The PCM uses this signal to adjust the idle speed, and on some models engages the A/C compressor clutch. If this signal is not available to the PCM,
the engine idle may be rough when the A/C compressor cycles. In some cases the A/C compressor will be inoperative.
