If they designed it so you could configure it with FCADiag, then a bad tech at the Dealership might disable it in the future, but then you'd only need 5 minutes with FCADiag, to re-enable it yourself. And salescode to dummy proof the tool for bad techs at the dealership wouldn't matter if its enabled by default. Even for safety, its fused with fuses already there, (so not even the cost of the fuses), so a crash or short isn't any realistic danger. They very well could have the central gateway configured that the tow harness is enabled be default, if you don't have the wiring or even just missing the connector, would be no penalty to the system in anyway. The kick in the pants is, there is no reason to make the tow harness disabled in the first place, other than to create an additional revenue stream of forcing customers into dealerships and paying to have things "enabled". So, in a sense, this extra step is dummy proofing the tools against a tech doing something dumb and disabling the tow harness that your previously paid to have enabled. And even if he did, the Scan Tool would be connected to the cooperate database and would configure the central gateway according to the sales codes in the database for the vehicle. Unless he was to replace the central gateway, which is the TIPM.
So, in the future, a Dealership Tech doing some sort of work with the Dealer Scan tool should not do anything that would change the central gateway configuration. But its all done by connecting the Dealer Scan Tool to the vehicle and over the internet to the Cooperate HQ database, to set a sales code to add to the vehicles configuration. Click to expand.My understanding, its a salescode thing, they have to configure the central gateway to use the tow harness, and also update the central database that FCA keeps of all the vehicles in service that the vehicle now has this option.
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