Seville STS V8-4.6L VIN 9 (1998)
Refrigerant Pressure Sensor / Switch: Description and Operation
An A/C refrigerant pressure sensor is mounted in the discharge hose near the compressor. The sensor output to the PCM is variable and is dependent
upon pressure inside the line. A high line pressure results in a higher voltage output. The PCM communicates the status of the A/C system pressure to the
Dash Integration Module (DIM) via class 2 serial data. The DIM constantly monitors the A/C refrigerant pressure in order to perform the following
functions:
^
Disengage the A/C clutch if the pressures are above 2826 kPa (430 psi).
^
Disengage the A/C clutch if the pressures are below 207 kPa (30 psi).
^
Cooling fan control.
The PCM monitors the A/C refrigerant pressure sensor to boost the idle air control to compensate for A/C load at idle.
The sensor is serviced by replacement only.
