A/C Pressure Sensor
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Mercury Sable, 2002 Mercury Mountaineer, 2002 Mercury Grand Marquis, 2002 Mercury Cougar, and 2002 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
The A/C pressure sensor is located in the high pressure (discharge) side of A/C system. A/C pressure sensor provides a voltage signal to the Powertrain Control Module (PCM) that is proportional to A/C pressure. PCM uses this information for A/C clutch control, fan control and idle speed control.