Battery charging for stop-start engine question

[grazuncle2]

WHAT!!!

You have to register a battery.. LOL

can this be done with a simple/basic OBD 2 device? The thought of paying VW £?? to put my car on a diagnostic machine to register a battery is putting me off...

I have a simple Think100 OBD 2 device coming.. not purchased it for this though.

Thanks

Amazing the stuff I have learned here that's change since my last Polo 2006 1.4 TDi....!!!

[RUM4MO]

Maybe not 100% necessary, but the smart charging system adapts itself to the changing/dying battery's needs it seems, and like most systems that use/contain adaptive parameters, it should again change to suit a new battery, now by itself the adaptive parameters don't seem to change rapidly, so workshops and most interested DIYers, use a scan tool, one that is compatible with VW Group controllers, not a general OBD2/OBDE scan tool that will only check for emissions fault codes in the engine controller(s), and carry out a "reg'ng battery" procedure, this lets the BMS (Battery Management System) know that a new battery has been fitted and if the new battery is "higher" than the original, a new set of basic values will get applied to the smart charging controller, or if the same size of battery has been fitted, by changing the battery serial number, the system knows that the battery has been replaced and so applies the correct basic values for that same size of battery - so charging changes immediately and so, in theory the new battery get looked after better-sooner and so might just last longer.

Unless you have built up a history of what happens battery life wise by "not" or by "doing" the right or recommended thing when changing a battery, it will probably be best to get any new battery "reg'd" to the car.

[grazuncle2]

That's a full info reply!

Not as simple as I expected.

[ho8882000]

According to the "Owner's Manual" and the "Workshop Repair Manual" you need to input the new battery's details into the computer.

Extract from the Owner's Manual:

2.jpg (3.37 MiB) Viewed 1192 times

Extract from the Workshop Repair Manual:

1.jpg (99.1 KiB) Viewed 1192 times

And this video show you how to do it with VCDS:
[youtube]https://www.youtube.com/watch?v=IJAScg6JrYI&t=26s[/youtube]

[grazuncle2]

OMG!

[RUM4MO]

OMG!

It really isn't rocket science - just sounds/looks a bit tricky if you have never used these scan tools, Carista for instance has been designed to be "one click" mainly so using it makes most jobs quite easy/dumbed down, VCDS does require a bit more sense of adventure, but well worth it!