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Home >> Toyota >> 2004 >> ECHO 2D Sedan, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> SFI System >> Vapor Pressure Sensor >> Inspection

Vapor Pressure Sensor: Inspection

Fig 1: Inspecting Power Source Voltage Of Vapor Pressure Sensor
G02906221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. INSPECT POWER SOURCE VOLTAGE OF VAPOR PRESSURE SENSOR 
    1. Disconnect the vapor pressure sensor connector.

      HINT:

      Near the fuel tank.

    2. Turn the ignition switch ON.
    3. Using a voltmeter, measure the voltage between connector terminals 1 and 3 of the wire harness side.

      Voltage: 

      4.5 to 5.5 V 

      If the voltage is not as specified, then see CIRCUIT DESCRIPTION .

    4. Turn the ignition switch to LOCK position.
    5. Reconnect the vapor pressure sensor connector.
  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 to 3.6 V 

      If the volage is not as specified, see CIRCUIT DESCRIPTION .

    4. Reinstall the fuel tank cap.
      Fig 2: Measuring Output Voltage
      G02906222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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