It's nonsense. As long as you buy a battery with the same mAH rating as your existing battery, it's plug and play. When I changed mine last year I didn't even need to enter the radio code. Just order one online and change it on your driveway. If I can do it, so can a Chimpanzee

 

UPDATE - This video was just released by DAP and covers replacement and programming of a new battery for the Audi S4. You can skip past the replacement instructions and get right to how to program by skipping to timestamp 3:45 -

Be sure to continue reading as not all TTs require recoding. It will depend on your year and whether or not your battery has a Battery Management Control unit.

How to Install and Recode a Battery

The Ross-Tech site is pretty clear about programming the battery. It looks like there's two parts to this issue; (1) if your battery has a Battery Management Control Unit and (2) if your vehicle has Group 61 - Battery Regulation.

http://wiki.ross-tech.com/wiki/index.ph ... _using_CAN

Ross-Tech YouTube -

Battery Replacement

A large majority of modern VW/Audi/Seat/Skoda vehicles require the configuration of replacement batteries. The diagnostic steps vary depending on the actual vehicle configuration.

Prerequisites:
New VW/Audi Battery Installed
Aftermarket batteries may NOT have a valid Part Number, Vendor code or Serial number. Ross-Tech cannot offer assistance if the necessary information is missing.
Key On, Engine OFF

Contents
1 61-Battery Regulation using CAN
1.1 Coding
2 19-CAN Gateway using CAN
2.1 Long Adaptation
2.2 Special Notes
3 19-CAN Gateway using (UDS/ODX)
3.1 Adaptation
4 Example Picture
5 Video Link
6 Notes
61-Battery Regulation using CAN
This procedure applies to battery replacement in vehicles using a separate battery management control module.

Address 61: Battery Regul. Labels: 4F0-910-181.lbl
Part No SW: 4F0 910 181 E HW: 4F0 915 181 A
Component: ENERGIEMANAGER H12 0490

Subsystem 1 - Part No: 000 915 105 C
Component: von VA0 2502160103
Coding: 303030393135313035432056413032353032313630313033
Shop #: WSC 54332 321 22222
Coding
[Select]
[61 - Battery Regulation]
[Coding - 07]
Use the pull down menu to select the battery (slave) listed as #1.
[Battery Coding]
Enter the new Battery Part Number (10 or 11 digits).
Enter the new Battery Serial Number (10 digits).
Select the new Battery Vendor.
[OK]
[Do it!]
[Close Controller, Go Back - 06]
Your new Battery should now be coded and the Battery Control Module should be aware of the new Battery.
19-CAN Gateway using CAN
This procedure applies to battery replacement in vehicles using a battery management control module that is a slave/subsystem of the CAN Gateway.

Address 19: CAN Gateway (J533) Labels: 8T0-907-468.clb
Part No SW: 8T0 907 468 Q HW: 8T0 907 468 L
Component: GW-BEM 5CAN-M H10 0095

Subsystem 1 - Part No SW: 8K0 915 181 B HW: 8K0 915 181 B
Component: J367-BDM H04 0150
Long Adaptation
Installation of a new battery requires the use of the [Long Adaptation-0A] function under 19-CAN-Gateway control module. Follow the on-screen instructions to enter the Part Number, Vendor, and Serial Number all as one long new value.

[Select]
[19 - CAN-Gateway]
[Long Adaptation-0A]
Channel 004
[Read]
VCDS will populate instructions in the form of a pop-up balloon with the formatting. For example:

Format: NNNNNNNNNNN XXX ZZZZZZZZZZ

N = Battery Part Number (11 Digits)
X = Battery Vendor (3 Digits)
Z = Battery Serial Number (10 Digits)
[Add to Log] Saving the original value to a log is strongly recommended.
Type the New Battery details into the New value field.
Note, the New value must be 26 (alpha numeric) total characters including the spaces! If in doubt check the saved log for the original battery formatting details.
[Test]
[Save]
Providing the value was accepted by the controller the new battery coding is complete.
[Done, Go Back]
[Close Controller, Go Back - 06]

Special Notes
Measuring Block groups 008, 019 and 020 should show Battery information.
Registered users encountering difficulty can contact us via email -or- join and post in our forum. Please include the Auto-Scan, Saved Adaptation Channel 004 Log prior to modifications, the part number, serial number and vendor code located on the original battery and the details located on the brand new battery in addition to the error message details.
tinyurl.com/pzgolq7

19-CAN Gateway using (UDS/ODX)
This procedure applies to battery replacement in vehicles using a battery management control module that is a slave/subsystem of the CAN Gateway.

Address 19: CAN Gateway (J533) Labels: None
Part No SW: 4G0 907 468 E HW: 4G0 907 468 A
Component: J533--Gateway H08 0213
ASAM Dataset: EV_GatewUDS 001025

Battery Monitoring Control Module:
Subsystem 1 - Part No SW: 8X0 915 181 HW: 8X0 915 181
Component: J367-BDM H07 0140
Adaptation
Installation of a new battery requires the use of the [Adaptation-10] function under 19-CAN-Gateway control module. Use the drop-down menus to enter the Part Number, Vendor, and Serial Number information located on the new battery .

[Select]
[19 - CAN-Gateway]
[Long Adaptation-0A]
Battery adaptation - Size
Select the battery Ah rating from the drop-down menu followed by [Do It!] and confirm [Yes]
Battery adaptation - Manufacturer
Select the battery manufacturer from the drop-down menu followed by [Do It!] and confirm [Yes]
Battery adaptation - Serial number
Type the serial number code from the replacement battery followed by [Do It!] and confirm [Yes]
Providing the value was accepted by the controller the new battery coding is complete.
[Done, Go Back]
[Close Controller, Go Back - 06]

 

Coding resets the battery charging algorithm to it's initial state. I have read some reports that say that the charging circuit will eventually relearn your battery's condition, but I've seen no proof to verify this claim one way or the other.

It is not a big deal if you don't recode your battery after replacement if your replacement is the same chemistry and output. Battery longevity 'might' be reduced since the charger won't be optimized, but to what degree? hard to say...

If you do change battery types, say flooded cell to AGP, you will definitely want to recode since different chemistry requires different charging rates and voltage.

You will also want to recode if your new battery differs in Ah output since the battery management software will incorrectly predict how much reserve power is left / available.

 

This has been raised here on a few occasions before. The consensus has always been that the Mk2 TT does not have a battery management module and therefore does not need any recoding when the battery is changed.

 

@ TTtony - Agreed, this topic goes back a few years. From the posts, there's clearly two camps on this subject; those who say the TT doesn't have it and those who say it does.

From the Audi TT Mk2 (8J) parts list, there is something called the 'Control Unit for Battery Monitoring'. So I would guess this is not the same thing as the 'Battery Management Module' which is listed for an Audi A8 - Control Unit for Battery Energy Management P/N 4E0915181.

https://audi.7zap.com/en/rdw/audi+tt+tt ... 915000/#17

(Posted 10 Nov 2014) - The reason for me to assume that a like for like replacement will work OK is that I believe that the battery management module cannot be aware of the actual capacity a battery has. As you are aware batteries deteriorate over time resulting in their capacity to become less. The only way to find out what the actual capacity is, is to drain the battery to a low state of charge and see how much charge could be pulled from it and check the electrolyte. This is something the car doesn't do.

So I think the battery management module is more focused on the charging voltage and the current. As soon as the battery reaches a certain voltage that indicates full, the charging voltage and current will be lowered to a safe value and don't remain on the old 14.4V. In fact I can see the charging voltage in my 2006 TT starting at 14.3V, just after starting her up after a two weeks stand still. And on an hour's drive it will gradually go down to 13.8 - 14.0 V. I haven't seen it going lower than that. But this is all due to the no maintenance sealed battery type. It doesn't need the topping up with distilled water any more because it isn't kept at 14.4V. At 14.4V and higher, water is turning into hydrogen and oxygen especially if the battery is full.

The AGM type of batteries have their own management style. In order to save fuel, these batteries sometimes aren't charged at all and they can withstand low states of charge very well (unlike the classic batteries that are actually killed by it). And AGM batteries are suitable for frequently starting, like is required in all these modern cars that automatically turn off when idling.

It's starting to become a long post. But I did my homework before changing my battery....

I believe the charge module just needs to know: classic battery, or gel battery or AGM battery. And based on that info the car will adopt its charging regime. So change like for like and the car doesn't need any instructions.

 

In that diagram it looks to just be the earth strap, without any extra wires a cannot see how it can do anything. Sometimes the Audi parts descriptions get lost in translation I think

 

If fitted on the Mk2 - and I don't believe it is - the monitor unit goes on the earth terminal and has a female socket for the wiring connection (the black part sticking out top right):

The unit on the positive terminal contains a one-use disconnect unit that is activated in the event of an accident; triggered by the deployment of an air bag.

 

Agreed. It's completely different from the Battery Energy Management Module P/N 4E0915181 shown below which is for an Audi A8.

Therefore I would agree with Ashfinlayson, the Mk2 (8J) doesn't have one and no coding (programming) is required. But I'm curious what, if anything, is on my (2007 3.2 Quattro Roadster) battery cable since I still have the original battery.

EDIT - Photos of my battery reveals nothing on the negative terminal or the cable.

It would be a very interesting conversation with a stealership if they ever charge for reprogramming after installing a new battery...exactly WHAT are they reprogramming if there's no Battery Energy Managment Module?? Caveat emptor!

 

Agreed. It's completely different from the Battery Energy Management Module P/N 4E0915181 shown below which is for an Audi A8.

Therefore I would agree with Ashfinlayson, the Mk2 (8J) doesn't have one and no coding (programming) is required. But I'm curious what, if anything, is on my 2007 battery cable since I still have the original battery.

Edit - Photos of my battery reveals nothing on the negative terminal or the cable.

It would be a very interesting conversation with a stealership if they ever charge for reprogramming after installing a new battery...exactly WHAT are they reprogramming if there's no Battery Energy Managment Module?? Caveat emptor!
Yes...... my thoughts exactly Swiss :roll:
.

 

Just for comparison, my Mk3 with the battery management module:

 

Well I say go to Audi and get them to test and fit. No worries then. You get a guarantee and you don't have the hassle. Yes its fairly expensive but thats what you get for buying an Audi else get a Vauxhall. As some will remember I recently went through the same questions on here and went off to pay the £250 for supply, fit, coffee and guarantee. However Audi Tested it and said we don't need to change it go charge it up not many garages would say that when you turn up asking for a battery and your cash in your hand.

PS They said my 2012 roadster needed some coding. If the car was old and I didn't care to much about it I would try just chucking another on but it cost me a lot of money once so I try and keep it as pristine and original as I can so that it will last me many years

 

Just to throw a curve ball in to the mix; I changed the battery recently on my Mk 2 (2013) TTS, and as you can see in the pic, the negative terminal has what I presume to be the battery management module attached? (which looks identical to @brittan's)
Maybe the very late models featured this?
I did go through the process of coding it myself through VCDS at the time.

 

I checked the Audi TT parts listings (Search for parts. Buying auto parts around the world. Auto parts catalogs.) year to year. From 2007-2010 item 17 "Control Unit for Battery Monitoring" (CUBM) is shown in the illustration, but is not included in the parts list.

The first time it shows up is on the 2011 parts list (01.11.2010) and remains present up through the 2014.

However on the 2015 illustration you can see it's a different design with a different part number; 8S0 915 181 A, but still the same name; "Control Unit for Battery Monitoring"

Based on this information I think it's safe to say:

• Vehicles from 2007 to 2010 not fitted with a CUBM do not require programming.
• Vehicles from late 2010 onward fitted with a CUBM do.

A quick look at your negative battery terminal will be the definitive answer for whether or not you have one, and whether or not programming is required.

 

I checked the Audi TT parts listings (Search for parts. Buying auto parts around the world. Auto parts catalogs.) year to year. From 2007-2010 item 17 "Control Unit for Battery Monitoring" (CUBM) is shown in the illustration, but is not included in the parts list.

The first time it shows up is on the 2011 parts list (01.11.2010) and remains present up through the 2014.

However on the 2015 illustration you can see it's a different design with a different part number; 8S0 915 181 A, but still the same name; "Control Unit for Battery Monitoring"

Based on this information I think it's safe to say:

• Vehicles from 2007 to 2010 not fitted with a CUBM do not require programming.
• Vehicles from late 2010 onward fitted with a CUBM do.

A quick look at your negative battery terminal will be the definitive answer for whether or not you have one, and whether or not programming is required.

View attachment 370442
View attachment 370434
View attachment 370426

 

Great work Swiss
I think mine has that gizmo on the neutral. Pic attached.

 

Excellent! Thanks again Swiss! BTW, my TT convertible flap motors are still working great and haven't had a hitch since!!

 

Since I was quoted a few posts earlier, let me chime in on this one:

It's clear from the pictures posted and the parts list later MK2 TT were, depending on their option codes (PR-J0R, PR-J1N, PR-J0N), equipped with a battery management module. I can also see that the actual part number of the battery has changed, even though the specifications seem to remain the same.

My initial statement back in 2014 seems to be correct for only the pre facelift models.

Thanks to SwissJetPilot for digging up the latest details on this subject.

 

hi all, so mines is the facelift mk2, iv been having a issue whenever iv put a new battery in, after 2 weeks it will die..

audi did a draw test on my car overnight and said the max draw was 0.044 amps which is normal..

so im wondering if I actually need to get the battery programmed to the car as they are suggesting?

this is my second battery from new which has now been drained somehow..

many thanks

 

You probably do need a battery reset in the Audi computer. If it's not an original Audi replacement battery, the dealer may claim they can't do it through their software.

Alternatively recharge the battery yourself and see if your Audi is self learning. Assuming here that the alternator is actually OK and charging the battery during a drive too.

 

Great work Swiss
I think mine has that gizmo on the neutral. Pic attached.

Hello Carlo,
i too have a same battery fitment and wiring on my 2012 TT 2.0 TFSI Quattro.
can you please direct for anything special to be checked in battery replacement and what to check for in terms of control unit for battery while refitment of a new one. ?

thanks in advance,

 

hi all, so mines is the facelift mk2, iv been having a issue whenever iv put a new battery in, after 2 weeks it will die..

audi did a draw test on my car overnight and said the max draw was 0.044 amps which is normal..

so im wondering if I actually need to get the battery programmed to the car as they are suggesting?

this is my second battery from new which has now been drained somehow..

many thanks

Facing the same issue on my 2012 mk2 TT 2.0 TFSI Quattro.
Can someone please guide me for control module programming.
what all do i need to check for confirming the presence of control module ?

thanks in advance.

 

SwissJetPilot wrote:
Agreed. It's completely different from the Battery Energy Management Module P/N 4E0915181 shown below which is for an Audi A8.

Therefore I would agree with Ashfinlayson, the Mk2 (8J) doesn't have one and no coding (programming) is required. But I'm curious what, if anything, is on my 2007 battery cable since I still have the original battery.

Edit - Photos of my battery reveals nothing on the negative terminal or the cable.

It would be a very interesting conversation with a stealership if they ever charge for reprogramming after installing a new battery...exactly WHAT are they reprogramming if there's no Battery Energy Managment Module?? Caveat emptor!
Yes...... my thoughts exactly Swiss :roll:

SwissJetPilot,

Do you have a negative rail battery sensor on your 3.2, as image, if not is the charge rate static around 14.2 volts once car is being driven, is your battery AGP.

Can anyone tell me the charging regime for early 3.2 TT`s mk1 or mk2`s, they should all have AGP battery`s, do these early cars charge at around a constant 14.2 volts while being driven. If the voltage does drop to 13.5 or so how does this happen without a sensor on the battery.

https://www.ttforum.co.uk/forum/downloa ... 370170&t=1

Come on guys I need to know, should be a simple question answer.

Rob.

 

Anyone.

 

I have the same as SwissJetPilot. TT Mk2 3.2 VR6 quattro, 2007.
My battery is the same - Varta 1J0915105AG (I don't think it was AGM), no sensor at the negative terminal. The charging begins at approx. 14,1 V, after some time it falls to approx. 13,6 V (all at 20 ºC).
Almost the same (14,1/13,8 V) does another my car (Mazda CX-7 2,3 DISI).
What is the exact algorithm I don't know but ECU has a lot of information regarding the battery state.

 

I suppose that the negative terminal adapter contains a Hall sensor for cranking current measurement.

 

Just a follow up with the colder weather now upon us. It's not unusual for batteries that are on their last legs, or in my case, not used much in the winter months (garaged) to end up flat. Your first indicator is the tell tale spoiler-in-the-up-position when you come out to the car. I've had this happen at least twice, and a good overnight trickle charge* has always sorted this issue (so far).

One other thing to be aware of is after flat battery has been recharged, it's not uncommon for several of the dash warning lights to remain on. On the speedometer, the steering wheel light may be on. And on the tachometer, you'll probably see the the AMR, TPMS, and ESC lights remain on. This will resolve itself once you take the car out for a drive as they normally reset themselves after 5-minutes or so. Note - the lights on the dash issue may also happen if you disconnect the battery, but will also go away after a brief drive so all the related sensors can re-set.

*The CTEK MXS 5.0 Battery Charger works great!

For anyone who needs a refresher on the dash lights, here's a handy reminder (not TT specific)
http://www.prestigeimports.net/audi-das ... ng-lights/

 

Battery is dying after 10 years of good service.
I looked up the Varta site. I'm going for the AGM (group f21) version even if it is apparently designed for vehicles with the startandstop feature.
Anyone have any opinion about this choice.
I'm running another AGM varta group e39 in another vehicle.

Varta 580901080D852 F21 Silver Dynamic AGM 12 V, 80 Ah, 800 A