I get mine on Wed so I'll have to read what all is required. Unless you wanna post up photos of the instructions?
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Installing the 2018 bypass involves more than just the adapter between the ODBII and the ProCal – there are separately a set of two wires (open connectors on one end, joint plug on the other) that go into the ODB II that cross-connect it to the Star connector. You have to remove the OBDII connector locks, then insert the two open terminals into the ODBII connector harness, reinstall the connector locks, then insert the plug end of the wires into any of the Star connector openings.
If the dealer has to look up under the ODBII connector they will see it. If they have to use the STAR connector for anything, the plug would have to be removed.
it is reversible isnt it? i read the directions and i dont recall any cutting or splicing.
if your careful with the hardware, dont cut or damage any plastic, you should be able to deny any modification.
i believe you can make the changes with the procal, then remove the harness until you need to make any further changes.
I think it may be reversible, but the wires between the ODBII and Star connector will have to be removed each time you go in to the dealer to be on the safe side (because of nightmare stories of dealerships "flagging" your vehicle in the system, then you're screwed).
So I guess, though, you're saying install it, make your settings, then uninstall it? I guess that would work so long as when you put the connector lock back on, it doesn't permanently attach the metal terminals. They look like they each have a wing that might bend into place to lock them in. Not sure.