A/C Pressure Sensor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Honda Odyssey, 2016 Honda Odyssey, 2015 Honda Odyssey, 2014 Honda Odyssey, and 2013 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
The A/C pressure sensor converts A/C pressure into electrical signals to the PCM.
A/C PRESSURE SENSOR ELECTRICAL REFERENCE
| A/C System Pressure | Sensor Output Voltage (V out) | System Operation |
|---|---|---|
| Abnormally low pressure: Below 196 kPa (2.00 kgf/cm2 , 28.4 psi) | Below 0.684 V | The PCM disengages the A/C compressor clutch. The radiator and A/C condenser fans operate based on engine coolant temperature. |
Normal operating pressure:
|
0.685 V to 1.944 V | The PCM cycles the A/C compressor clutch based on cooling demand. The radiator and A/C condenser fans operate at low speed unless the engine coolant temperature exceeds 206°F (97°C). |
High operating pressure:
|
1.945 V to 4.575 V | The PCM cycles the A/C compressor clutch based on cooling demand. The radiator and A/C condenser fans operate at high speed. |
| Abnormally high pressure: More than 3, 138 kPa (32.00 kgf/cm2 , 455.1 psi) | Above 4.575 V | The PCM disengages the A/C compressor clutch. The radiator and A/C condenser fans operate based on engine coolant temperature. |
| The A/C system high side pressure can be monitored through the climate control sensor input display function (see RUN THE SENSOR INPUT DISPLAY MODE
). The response of the A/C pressure sensor is shown in the graph. |
||
NOTE:
When the refrigerant is below 196 kPa (2.00 kgf/cm2
, 28.4 psi) or above 3, 138 kPa (32.00 kgf/cm2
, 455.1 psi), the PCM turns the A/C compressor clutch relay off to protect the A/C compressor. When the refrigerant pressure is above 1, 670 kPa (17.03 kgf/cm2
, 242.2 psi), the PCM switches the radiator and A/C condenser fans to high speed.