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On-Vehicle Inspection

  1. CHECK A/C PRESSURE SENSOR 
    1. Check the wire harness.
      1. Disconnect the connector from the pressure sensor.
      2. Measure the resistance of the wire harness side connector.
        Fig 1: Identifying A/C Pressure Sensor Connector
        G05307049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        STANDARD RESISTANCE SPECIFICATION

        Tester Connection Specified Condition
        B4-1 - Body ground Below 1 Ω
      3. Measure the voltage of the wire harness side connector.

        Standard voltage 

        STANDARD VOLTAGE SPECIFICATION

        Tester Connection Specified Condition
        B4-1 - B4-3 5V
    2. Check the pressure sensor.
      1. Set the manifold gauge.
      2. Connect the connector to the pressure sensor.
      3. Warm up the engine.
      4. A/C switch is turned ON.
      5. Measure the resistance according to the value(s) in the table below.

        Standard voltage 

        STANDARD VOLTAGE SPECIFICATION

        Tester Connection Condition Specified Condition
        K52-13 (PRE) - K52-38 (SG-2) 0.196 to 3.14 MPa (2.0 to 32 kgf/cm2 ) 0.73 to 4.85 V

        If the result is not as specified, replace the sensor.

        Fig 2: Identifying Pressure Sensor Connector And Resistance Graph
        G05307050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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