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A/C Refrigerant Pressure Sensor and Its Circuit Inspection

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.

Reference: 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: 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/cm 2  , 116 psi): 1.40 - 1.78 V 

    1.4 MPa (14 kgf/cm 2  , 203 psi): 2.18 - 2.64 V 

    1.6 MPa (16 kgf/cm 2  , 232 psi): 2.44 - 2.92 V 

    1.8 MPa (18 kgf/cm 2  , 261 psi): 2.70 - 3.21 V