AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION


  1. INSPECT AIR CONDITIONING PRESSURE SWITCH (for Single Air Conditioning System)


    1. A0099D6E02
      Text in Illustration
      *a

      Component without harness connected

      (Air Conditioning Pressure Switch)
      *b Low Pressure Side
      *c On (Below 1.0 Ω)
      *d High Pressure Side
      *e Off (10 kΩ or higher)

      Install a manifold gauge set.

    2. Connect the positive (+) lead from the ohmmeter to terminal 1 and the negative (-) lead to terminal 2.

    3. Check the resistance between terminals when refrigerant pressure is charged as shown in the illustration.

      If operation is not as specified, replace the air conditioning pressure switch.

  2. INSPECT AIR CONDITIONING PRESSURE SWITCH (for Dual Air Conditioning System)


    1. Install a manifold gauge set.

    2. Disconnect the connector from the air conditioning pressure switch.

    3. A0094PUE02
      Text in Illustration
      *a

      Component without harness connected

      (Air Conditioning Pressure Switch)
      *b Voltage
      *c Refrigerant Pressure

      Connect the positive (+) lead of a DC 5 V power source to terminal 3 and the negative (-) lead to terminal 1.

    4. Connect the positive (+) lead of the voltmeter to terminal 2 and the negative (-) lead to terminal 1.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2 (PR) - 1 (-)

      Refrigerant pressure:

      0.39 to 3.187 MPa (57 to 463 psi)

      		 0.93 to 4.9 V

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