V70R AWD L5-2.3L Turbo VIN 52 B5234T6 (1998)
A/C Signal: Description and Operation
A/C Pressure Sensor
A/C Pressure Sensor
A/C PRESSURE SENSOR
The A/C pressure sensor, which is of a new type delivering a linear signal, supplies the ECM with information regarding the pressure in the A/C high
pressure circuit.
The purpose is to control the following functions:
^
Starting of the engine cooling fan at low speed
^
Starting of the engine cooling fan at high speed
^
Switch-out of the A/C compressor if the system pressure becomes excessive
^
Idling compensation for A/C load (only normally aspirated engine)
The sensor is supplied at 5 Volts by the ECM. The sensor signal may vary from 0 to 5 Volts, depending on the system pressure. Low pressure
produces a low- voltage signal and high pressure a high-voltage signal.
The sensor is installed in the A/C high-pressure circuit.
