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Vapor Pressure Sensor: Inspection

  1. INSPECT POWER SOURCE VOLTAGE OF VAPOR PRESSURE SENSOR 
    1. Disconnect the vapor pressure sensor connector.
    2. Turn the ignition switch ON.
    3. Using a voltmeter, measure the voltage between connector terminals 1 and 3 of the wiring harness side.

      Voltage: 4.5 - 5.5 V 

    4. Turn the ignition switch OFF.
    5. Reconnect the vapor pressure sensor connector.
    Fig 1: Measuring Voltage Between Connector Terminals 1 And 3
    G04207901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT POWER OUTPUT OF VAPOR PRESSURE SENSOR 
    1. Turn the ignition switch ON.
    2. Remove the fuel tank cap.
    3. Connect a voltmeter to terminals 2 and 3, and measure the output voltage.

      Voltage: 3.0 - 3.6 V 

    4. Reinstall the fuel tank cap.
    5. Turn the ignition switch OFF.
    Fig 2: Measuring Output Voltage
    G04207902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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