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On-Vehicle Inspection

  1. INSPECT PRESSURE SWITCH 
    1. Install the manifold gauge set.
    2. Disconnect the connector from the pressure sensor.
    3. Connect the three 1.5 V dry cell batteries' positive (+) lead to terminal 3, and the negative (-) lead to terminal 1.
    4. Connect the voltmeter's positive (+) lead to terminal 2, and the negative (-) lead to terminal 1.
    5. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying Pressure Sensor Terminals With Refrigerant Pressure Graph
      G05774802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      PRESSURE SENSOR - TESTER CONNECTOR SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      2 - 1 Refrigerant pressure: 0.39 to 3 187 MPa (57 to 463 psi) 1.0 to 4.8 V

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

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