Post by paul47 on Jun 21, 2020 0:06:11 GMT
I used this VCDS video for some hints:
It looked like for the A3 for my year (2015) this is the third type he mentions in that video, in other words the one with the protocol UDS. I got to the right place this way on the OBDeleven:
Gateway>Adaptation>Battery Adaptation
That gives the 4 fields that can change, size, mfg, ser no., and part number. The size can be found somewhere on the new battery, something like 72 Ah in my case, and the rest are on the BEM code sticker. Make sure you have such a sticker on the new battery when you buy it (It's apparently not the end of the world if you don't). I went with a stock battery from my dealer despite the cost. The older I get the less time I have to fiddle around trying to get stuff to fit.
The BEM sticker uses a slash to distinguish a zero from an O, but the OBDeleven software unfortunately does not follow this convention, so you have to be careful when entering the codes.
All of the above comes from my inadequate notes and inadequate memory, so beware...
Other stuff...
I found I had an old 12v 15A linear power supply to hook up so I wouldn't lose my codes. I hooked + inside the fuse box (the big terminal strip on the end is all 12V but I used the one bolt there which went direct to the battery. For ground I just clipped onto the computer box next to the fuse box. I had no luck finding any radio code in my docs but using the power supply I didn't need it. I noticed you can get devices that plug into the cigarette lighter but that won't work unless you have the ignition on when you are swapping batteries - otherwise the cigarette lighter is not powered.
The battery clamp is tough to get to, so it's best to pull the terminals first, then get the insulation jacket out of there. Then you can get your hand down there and pull it out, but pushing it back a bit first. The battery is then slid all the way forward and can be lifted.
It looked like for the A3 for my year (2015) this is the third type he mentions in that video, in other words the one with the protocol UDS. I got to the right place this way on the OBDeleven:
Gateway>Adaptation>Battery Adaptation
That gives the 4 fields that can change, size, mfg, ser no., and part number. The size can be found somewhere on the new battery, something like 72 Ah in my case, and the rest are on the BEM code sticker. Make sure you have such a sticker on the new battery when you buy it (It's apparently not the end of the world if you don't). I went with a stock battery from my dealer despite the cost. The older I get the less time I have to fiddle around trying to get stuff to fit.
The BEM sticker uses a slash to distinguish a zero from an O, but the OBDeleven software unfortunately does not follow this convention, so you have to be careful when entering the codes.
All of the above comes from my inadequate notes and inadequate memory, so beware...
Other stuff...
I found I had an old 12v 15A linear power supply to hook up so I wouldn't lose my codes. I hooked + inside the fuse box (the big terminal strip on the end is all 12V but I used the one bolt there which went direct to the battery. For ground I just clipped onto the computer box next to the fuse box. I had no luck finding any radio code in my docs but using the power supply I didn't need it. I noticed you can get devices that plug into the cigarette lighter but that won't work unless you have the ignition on when you are swapping batteries - otherwise the cigarette lighter is not powered.
The battery clamp is tough to get to, so it's best to pull the terminals first, then get the insulation jacket out of there. Then you can get your hand down there and pull it out, but pushing it back a bit first. The battery is then slid all the way forward and can be lifted.