NSX-T V6-3.2L DOHC (VTEC) (1997)
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Refrigerant Pressure Sensor / Switch: Description and Operation
A/C TRIPLE PRESSURE SWITCH
The A/C triple pressure switch consists of a High-Low pressure switch (A/C pressure switch A) and a Middle pressure switch (A/C pressure switch B).
A/C Triple Pressure Switch
High-Low pressure switch
If the refrigerant pressure becomes too high (due to blockage), or too low (due to leakage), the A/C triple pressure switch sends a signal to the fan
control unit to prevent the compressor from operating.
A/C Triple Pressure Switch
Middle pressure switch
If the refrigerant pressure goes above or below 1,550 kPa (15.5 kgf/sq.cm, 220 psi), the A/C triple pressure switch sends a signal to the ECM, then
the ECM operates the idle control.
