LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2010 >> Cobalt LS, 4D Sedan, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Heating, Ventilation And Air Conditioning) >> Climate Control >> System Description >> A/C Pressure Sensor

A/C Pressure Sensor

WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. 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.

SYSTEM OPERATION CHART

A/C System Pressure(1) Sensor Output Voltage (V out) System Operation HDS PGM-FI Data List
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. FAN HIGH CONTROL: ON, OFF
FAN LOW CONTROL: ON, OFF
A/C PRESSURE SENSOR: V, kPa (kgf/cm2 )
Normal operating pressure:
  • Above 195 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.
High operating pressure:
  • Above 1,470 kPa(15.0 kgf/cm2 , 213 psi)
  • Below 3,138 kPa(32 kgf/cm2 , 455 psi)
 1.945 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 in the HDS PGM-FI Data List

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

Fig 1: A/C Pressure Sensor Voltage Output Graph
G06431266Courtesy of AMERICAN HONDA MOTOR CO., INC.
scientia non olet · About LEMON Manuals