Brando
Joined: 06 Jun 2003
Posts: 3069
Location: Michigan, USA
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| Posted: Sun Apr 20, 2008 4:31 pm Post subject: Re: AC low pressure cut-off |
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Quote: Refrigerant Pressure Sensor / Switch: Description and Operation
An electronic A/C pressure transducer is mounted on the discharge line of the A/C compressor suction/discharge hose assembly. Its output to the PCM is
variable and is dependent upon pressure inside the line. A higher pressure results in a higher voltage output. A/C pressure is constantly monitored to:
* Disengage the A/C clutch if the pressures are high -2700 kPa (430 psi).
* Disengage the A/C clutch if pressures are too low -below 303 kPa (44 psi).
* Control cooling fan operation of low and high speed.
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