AIR CONDITIONING PRESSURE SENSOR ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT NO. 1 PRESSURE SWITCH


    1. B001DO1E05
      Text in Illustration
      *a

      Component without harness connected

      (No. 1 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 No. 1 pressure switch.

  2. INSPECT AIR CONDITIONING PRESSURE SENSOR


    1. Install a manifold gauge set.

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

    3. A01XDCLE01
      Text in Illustration
      *a

      Component without harness connected

      (Air Conditioning Pressure Sensor)
      *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 sensor.