SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSACURA2008CSX BASE, K20A3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 17 (CLIMATE CONTROL SYSTEM)CLIMATE CONTROLSYSTEM DESCRIPTIONA/C PRESSURE SENSOR
2008 Acura CSX Base, K20A3

A/C Pressure Sensor

2008 Acura CSX Base, K20A3SECTION A/C Pressure Sensor
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. 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 OUTPUT VOLTAGE REFERENCE

A/C System Pressure(1) Sensor Output Voltage (V out) System Operation
Abnormally low pressure Below 196 kPa (2 0 kgf/cm2 , 28 psi) Below 0 685 V The PCM disengages the compressor clutch The radiator and condenser fans operate based on engine coolant temperature
Normal operating pressure
  • Above 196 kPa (2 0 kgf/cm2 , 28 psi)
  • Below 1,470 kPa (15 0 kgf/cm2 , 213 psi)
 0 686 V to 1 944 V The PCM cycles the compressor clutch based on cooling demand The radiator and condenser fans operate at low speed unless the engine coolant temperature exceeds 206 °F (97 °C)
High operating pressure
  • Above 1,470 kPa (15 0 kgf/cm2 , 213 psi)
  • Below 3,138 kPa (32 kgf/cm2 , 455 psi)
 1945 V to 4 575 V The PCM cycles the compressor clutch based on cooling demand The radiator and condenser fans operate at high speed
Abnormally high pressure More than 3,138 kPa (32 kgf/cm2 , 455 psi) Above 4 575 V The PCM disengages the compressor clutch The radiator and condenser fans operate based on engine coolant temperature
(1) The A/C system pressure can be monitored through the climate control sensor input display function (see TO RUN THE SENSOR INPUT DISPLAY MODE, FOLLOW THESE STEPS )

The response of the A/C pressure sensor is shown in the graph

NOTE: When the refrigerant is below 196 kPa (2 0 kgf/cm2 ,28 psi) or above 3,138 kPa (32 kgf/cm2 , 455 psi), the PCM turns the compressor relay off to protect the A/C compressor When the refrigerant pressure is above 1,390 kPa (14 2 kgf/cm2 ,202 psi), the PCM switches the radiator and A/C condenser fans to high speed
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.