Eric,
Hello & Welcome to the Forum!
Here's a link to the manual for your track inspection vehicle:
http://www.lionel.com/media/servicedocuments/71-8436-250.pdfYou'll want to make certain that your wheels & other electrical pick up points are clean.
Check to make sure that your back to back wheel spacing is correct and the wheels & axles properly lubricated.
Also a good time to clean your track and make continuity checks around your layout.
Happy Rails!
Dave