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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 

        TESTER CONNECTION SPECIFIED CONDITION

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

        Standard voltage 

        TESTER CONNECTION SPECIFIED CONDITION

        Tester Connection Specified Condition
        B4-1 - B4-3 5 V
      Fig 1: Identifying A/C Pressure Sensor Connector Terminals
      G05297972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

        TESTER CONNECTION SPECIFIED CONDITION

        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: Pressure Sensor Graph
    G05297973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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