Fuel Tank Pressure Sensor

Remove tank pressure sensor. Connect three 1.5 volt batteries in series. Connect positive terminal to "Vin" terminal of tank pressure sensor. See Fig 1 . Connect negative terminal to "Ground" terminal. Using a voltmeter, measure voltage between terminals "Vout" and "Ground". Connect a hand-held vacuum pump to tank pressure sensor. As vacuum is applied, voltage reading should decrease. Refer to the FUEL TANK PRESSURE SENSOR VOLTAGE  table. If reading is not as specified, replace tank pressure sensor.

Fig 1: Identifying Fuel Tank Pressure Sensor Terminals

Courtesy of SUZUKI OF AMERICA CORP.