AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT AIR CONDITIONER TUBE AND ACCESSORY ASSEMBLY


    1. Check the wire harness.


      1. Disconnect the air conditioner tube and accessory assembly connector.

      2. A004H85E01
        Text in Illustration
        *a

        Component without harness connected

        (air conditioner tube and accessory assembly)

        Using an ohmmeter, measure the resistance of the wire harness side connector.

        Standard Resistance
        Tester Connection Condition Specified Condition
        2 - Body ground Always Below 1 Ω
        2 - 4 Ignition switch ON Below 1 Ω

    2. Check the air conditioning pressure sensor.


      1. Install a manifold gauge set.

      2. A004IM2E03
        Text in Illustration
        *1 Sensor Part

        Apply pressure on the sensor as indicated in the table below, and check the resistance between the terminals.

        Standard Resistance
        for HFC-134a (R134a):
        Tester Connection Condition Specified Condition
        1 - 4 0 kPa (No Pressure applied) 10 kΩ or higher
        1 - 4 1520 kPa (15.5 kgf/cm2, 221 psi) Below 1 Ω
        2 - 3 0 kPa (No Pressure applied) 10 kΩ or higher
        2 - 3 22.5 kPa (0.23 kgf/cm2, 33.0 psi) or more and below 3140 kPa (32 kgf/cm2, 455 psi) Below 1 Ω
        2 - 3 3140 kPa (32 kgf/cm2, 455 psi) or more 10 kΩ or higher
        Standard Resistance
        for HFO-1234yf (R1234yf):
        Tester Connection Condition Specified Condition
        1 - 4 0 kPa (No Pressure applied) 10 kΩ or higher
        1 - 4 1520 kPa (15.5 kgf/cm2, 221 psi) Below 1 Ω
        2 - 3 0 kPa (No Pressure applied) 10 kΩ or higher
        2 - 3 248 kPa (2.53 kgf/cm2, 36.5 psi) or more and below 2980 kPa (30.4 kgf/cm2, 438 psi) Below 1 Ω
        2 - 3 2980 kPa (30.4 kgf/cm2, 438 psi) or more 10 kΩ or higher