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V70 GL L5-2.4L VIN 55 B5254S (1998)

Powertrain Management > Computers and Control Systems > A/C Signal > Component Information > Description and Operation > A/C Relay > Page 2926

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A/C Signal: Description and Operation
A/C Pressure Sensor

A/C PRESSURE SENSOR

The A/C Pressure Sensor transmits a linear signal. It informs the Engine Control Module (ECM) about pressure in the A/C high-pressure circuit.

The A/C pressure sensor regulates:

^  START of engine cooling fan at low speed
^  START of engine cooling fan at high speed
^  Stopping compressor if A/C pressure is too high
^  Torque compensation for A/C load.

The pressure sensor receives 5 V from the engine control module (ECM) The sensor signal may vary between 0 V and 5 V, depending on the system
pressure. Low pressure produces a low voltage signal and high pressure a high voltage signal.

The A/C pressure sensor is located in the A/C high pressure circuit.

Powertrain Management > Computers and Control Systems > A/C Signal > Component Information > Description and Operation > A/C Relay > Page 2926

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