AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT AIR CONDITIONING PRESSURE SENSOR


    1. Check the wire harness.


      1. Disconnect the A31 air conditioning pressure sensor connector.

      2. Disconnect the L17 air conditioning amplifier assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        A31-1 (-) - L17-13 (SG-2) Always Below 1 Ω
        A31-2 (PR) - L17-9 (PRE) Always Below 1 Ω
        A31-3 (+) - L17-10 (S5-3) Always Below 1 Ω
        A31-1 (-) - Body ground Always 10 kΩ or higher
        A31-2 (PR) - Body ground Always 10 kΩ or higher
        A31-3 (+) - Body ground Always 10 kΩ or higher
      4. A005CQRE02
        Text in Illustration
        *a

        Front view of wire harness connector

        (to Air Conditioning Pressure Sensor)

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        A31-3 (+) - Body ground Power switch ON 4.75 to 5.25 V

    2. Check the air conditioning pressure sensor.


      1. Install a manifold gauge set.

      2. Connect the air conditioning pressure sensor connector.

      3. Turn the power switch on (READY).

      4. A/C switch on.

      5. A005F31E02
        Text in Illustration
        *a

        Component with harness connected

        (Air Conditioning Amplifier Assembly)

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

        Tech Tips

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        L17-9 (PRE) - L17-13 (SG-2)

        Refrigerant pressure:

        3.025 MPa (30.8 kgf/cm2, 439 psi) to 0.167 MPa (1.7 kgf/cm2, 24 psi)

        		 0.70 to 4.69 V