A/C Refrigerant Pressure Sensor And Its Circuit Inspection

Reference: A/C REFRIGERANT PRESSURE SENSOR REMOVAL AND INSTALLATION 

1. Disconnect A/C refrigerant pressure sensor connector.
2. Turn ignition switch to ON position.
3. Check if voltage between "GRY/RED" wire terminal and "GRY/GRN" wire terminal of A/C refrigerant pressure sensor connector is 4.75 V to 5.25 V.

   If not, check A/C refrigerant pressure sensor circuit.

4. Connect A/C refrigerant pressure sensor connector with ignition switch turned OFF.
5. Connect manifold gauge set to the charging valves.
6. Check A/C refrigerant pressure sensor voltage of ECM connector referring to A/C SYSTEM INSPECTION AT ECM .

If voltage is not as specified below, replace A/C refrigerant pressure sensor.

A/C refrigerant pressure sensor voltage specifications (A/C refrigerant pressure measured by manifold gauge) 

0.8 MPa (8.0 kg/cm ²  , 116 psi): Approx. 1.46 - 1.71 V 

1.4 MPa (14 kg/cm ²  , 203 psi): Approx. 2.28 - 2.53 V 

1.6 MPa (16 kg/cm ²  , 232 psi): Approx. 2.55 - 2.80 V 

1.8 MPa (18 kg/cm ²  , 261 psi): Approx. 2.82 - 3.03 V