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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.

        Standard resistance 

        STANDARD RESISTANCE SPECIFICATIONS

        Tester Connection Specified Condition
        B4-1 - Body ground Below 1 Ω
        Fig 1: Identifying A/C Pressure Sensor Terminal
        G04020840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Measure the voltage of the wire harness side connector.

        Standard voltage 

        STANDARD VOLTAGE SPECIFICATIONS

        Tester Connection Specified Condition
        B4-1 - B4-3 5 V
    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 SPECIFICATIONS

        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 Connector To Pressure Sensor
        G04020841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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