Tracker 2WD L4-2.0L VIN C (1999)
Refrigerant Pressure Sensor / Switch: Description and Operation
A/C Refrigerant Pressure Sensor
A/C REFRIGERANT PRESSURE SENSOR
The A/C refrigerant pressure sensor is located next to the condenser fan motor in the liquid pipe, between the receiver dryer and the evaporator. The
A/C refrigerant pressure sensor cycles the compressor on and off under conditions of abnormally low or abnormally high refrigerant pressure.
If the pressure drops below 196 kPa (28 psi) or rises above 3140 kPa (455 psi), the A/C refrigerant pressure switch contacts (2) open and signals the
A/C compressor control module to shut down the compressor.
Abnormally low refrigerant pressure may be caused by the following conditions:
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An insufficient refrigerant supply
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Very low refrigerant temperatures
Abnormally high refrigerant pressure may be caused by the following conditions:
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Extremely high refrigerant temperatures
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An overcharging of the system during vehicle service
