Pick up a Haynes manual (not Chiltons) at the auto parts store.They help quite a bit.Second,you need a multimeter.But before you grab any of this and start messing around,how does the engine run? When cold,warmed up,mainly at idle speeds? Verifying which part in the evap system is faulty can require expensive special equipment sometimes depending on what is faulty.If the canister is faulty,by knowledge I don't know how one would go and test it without using a scanner that measures fuel vapor/ambient gas mix and flow.You can however,rule out the control valve by running a voltage output test using a multimeter.An inexpensive yet accurate meter would do fine.
First pick up the Haynes manual.Even if you don't need it now,it'll be a huge help in the longrun.
Now if anyone else here knows anything about the Evap system,please do chime in your comments.I've had a P1443 code ever since I bought the car 7 years ago.I ignore it though since it doesn't make the car run any worse.It's most likely the valve in my case since the solenoid works fine.Things like this aren't urgent enough for me to go out and just replace the dumb thing.