AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. CHECK AIR CONDITIONING PRESSURE SENSOR

    A000R9FE13
    Text in Illustration
    *a

    Front view of wire harness connector

    (to A/C pressure Sensor )

    1. Check the wire harness.


      1. Disconnect the connector from the air conditioning pressure sensor.

      2. Measure the resistance of the wire harness side connector.

        Standard Resistance
        Tester Connection Specified Condition
        1 - Body ground Below 1 Ω
    2. A000Q3HE08
      Text in Illustration
      *a

      Component with harness connected

      (Air Conditioner Amplifier Assembly)
      *b Voltage
      *c Refrigerant Pressure

      Check the air conditioning pressure sensor.


      1. Set the manifold gauge.

      2. Connect the connector to the pressure sensor.

      3. Warm up compressor.

      4. A/C switch is turned ON.

      5. Measure the resistance according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Condition Specified Condition
        9 (PRE) - 32 (SG-2)

        Refrigerant pressure:

        Normal pressure

        		 0.739 to 4.613 V
        9 (PRE) - 32 (SG-2)

        Refrigerant pressure:

        Abnormal 0.176 MPa [1.8 kg/cm2, 26 psi]

        		 Below 0.739 V
        9 (PRE) - 32 (SG-2)

        Refrigerant pressure:

        Abnormal 3.025 MPa 30.9 kg/cm2, 439 psi]

        		 4.613 V or higher

        Note

        Check from the rear of the connector while it is connected to the air conditioning amplifier.

        Tech Tips


        • Because the air conditioning pressure sensor connector is waterproof and can not be checked, check the air conditioning amplifier assembly. Also, if the measurement is less than 1 V, open-circuit of the harness may occur.

        • The specified condition is the value included in the pressure deviation.

        If the result is not as specified, replace the air conditioning pressure sensor.