remove the valve, depending on which model you have, it may be under near the tank or in the engine bay if thats where the canister is.
with the valve out of the car, air should flow freely between the 2 ports.
using jumper wires, apply 12v across the pins of the valve.(a 9v battery will also work)
you should hear a solid "click" and air should no longer pass through the valve.
if yours is the one near the tank, you will be able to see the plunger move inside the valve when voltage is applied.
you can also measure resistance, should be 25-30 ohms
if there is no click and air can still pass through when voltage is applied, replace the valve.
hope this helps
2008 suzuki SX4 sport sedan 5spd FWD
2007 suzuki boulevard C50 SE
2001 suzuki swift 1.3 5spd blue
Last edited by lumpylarry; 08-07-2009 at 07:17 PM.