A/C Refrigerant Pressure Sensor and its Circuit Inspection

A/C Refrigerant Pressure Sensor and Its Circuit Inspection

A/C Refrigerant Pressure Sensor Removal and Installation:Manual A/C
1) Disconnect A/C refrigerant pressure sensor connector.
2) Turn ignition switch to ON position.
3) Check if voltage between "RED" wire terminal and "ORN" 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 A/C System Inspection at ECM:Manual A/C.

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 kgf/cm2, 116 psi): 1.40 - 1.78 V
1.4 MPa (14 kgf/cm2, 203 psi): 2.18 - 2.64 V
1.6 MPa (16 kgf/cm2, 232 psi): 2.44 - 2.92 V
1.8 MPa (18 kgf/cm2, 261 psi): 2.70 - 3.21 V