Vapor Pressure Sensor: Inspection

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 wiring harness side.
  
  Fig 1: Measuring Voltage Between Connector Terminals 1 & 3 Of Wiring Harness Side Using A Voltmeter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - Voltage: 4.5-5.5 V
4. Turn the ignition switch to LOCK.
5. Reconnect the vapor pressure sensor connector.
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.
Fig 2: Measuring Output Voltage & Connecting Voltmeter To Terminals 2 & 3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002