The reader they use is updated with the newest software changes which includes TSBs and it will just tell them the date of the latest version of the software in your computer. Same as the Dodge house. Why did you think the dealership wouldn't be able to tell what version you were running? The reader the dealer hooked up does the same thing as you're outside guy. Looks to me like whoever sold you the car knew it had an issues that a software update wouldn't fix and dumped the car rather than pay a repair bill.