I am rather unexperienced with the forum and find it not easy to find answers already posted and solved so i put my question
My battery reads onlyy 11.7 after a day and when driving the charging voltage remains at 14.8 volts So i think i need a new battery
As i want do do the replacement myself i prepared myself reading the 2010xf workshop manual and in here it says THE BMS MODULE NEEDS
RE-CALIBRATING after changing ther battery
I do not have the "jaguar apprived diognostic system "at hand so i will try the exchange without recalibrating the module
I will charge the old battery as usual untill it reads 12.5 v , then i will use jumpers to connect a second (spare )to the pos. and neg. cables So the car will be at 12.5 v contiously
Then i will disconnect the old battery and connect the new one and after that disconnect the jumpers
I hope it will work but has anyone in the forum any experience or advise?
Hope for reaktion , John Alles former owner of a 3.0 l X-type and now owner of a XF 2011 with 3.0 diesel engine

 

Hi John

I personally would avoid the hassle of keeping the car constantly powered, because it will not help on the BMS issue.

As far as I know the only thing you lose when disconnecting the battery is the one touch open and closing of the windows, something you can easily restore yourself. However, the Battery Management System adapted itself to the old weak battery and will handle the new battery the same way if not told otherwise. That’s why it should be re-calibrated, as otherwise certain functionality like stop/start will be limited and the new battery might live shorter because it is not properly charged.

I’m not enough of expert to say if that really matters, or if the system will adapt itself quickly enough to the new battery.

Next to SDD also the Foxwell scanners are able to reset the BMS, perhaps that’s an option for you.

Cheers
Chris

 

Thank you chris for your advice Can you give me more info about the sdd and foxwell scanners? There are many types with different prices and i suppose capabilities. If possible select the tess expensive for me Thx John

 

The BMS should recalibrate itself after a while with the new battery, I didn't reset mine and it works perfectly. Make sure you give the car 10 mins to shut down all the electrics before removing the battery and also spray the bottom of the battery retaining bolt with wd40 as it commonly snaps off when you try to undo it.
It might also be worth replacing the stop start battery at the same time.

 

I don't think there's any stop start in a 2011. You should just have one battery

And I'd ignore the BMS stuff. Works fine without. It recalibrates itself regularly so it will catch up

As mentioned above, the bolt that goes through the floor can rust itself to the floor of the car (it pokes through the bottom) so try PB blast / wd 40 liberally the day before. But be prepared to replace if it breaks. I have a post on here with how to get the part low cost as it's used on fords too

 

Hi John

Short answer: google foxwell and Jaguar and find the best deal for your location.

Long answer:
While SDD is the official Jaguar Diagnosis tool which can do everything on almost any modern Jag, it is also rather complex to use: you need laptop or tablet, a communication interface (Mongoose or VCI) which is 400-500€ alone, and the actual software. The software is free to download, but you need a costly topix subscription to run it. There are cracked software versions, and cheaper china clones of the communication interface, with mixed reviews though. I do have SDD 160.01 on Windows 7 with a JLR VCI from Diagnostic Associates in my garage.

On the other hand there are the Foxwell OBD scanners, from China, too, but relatively easy to use and less expensive. Compared to regular OBD scanners they can access also JLR specific parts of the car’s computer network, and they allow to run many service routines a standard OBD scanner can’t.
I use my NT510 as mobile scanner and had no problems with it so far, other than the fact that a Firmware update rendered the device unusable on my 2000 XKR. The current Foxwell hardware version is NT530. These scanners can do other car brands, too, so be careful when ordering and make sure it is for Jaguar Landrover.

Both solutions have in common that you must attach a low noise power supply to the car when you carry out longer diagnose or service sessions. The car consumes a lot of battery power while working in the can bus, and you don’t want to run out of power in the middle of a reprogramming process. In fact some of the routines in SDD as well as on the Foxwell check the battery voltage level and will block the process if the level is too low (typically less than 12.5V)

I use a Voltcraft SPS1560 PFC which can deliver 60A with just 40mVp-p noise. I believe JLR’s minimum spec are 55A and 80mV ripple noise. Using a regular battery charger will likely not work because these chargers produce a lot of electrical noise which will cause communication issues between the diagnose device and / or the modules in the car. I’m convinced that many issues reported with China cable clones are actually caused by the use of improper power supplies and / or not using any power supply at all.

Cheers
Chris

 

Thank you very much for all that info Happy christmas John

 

I changed my battery for a agm 95 ah and every thing went well
I only discovered hidden behind de right side af the accu a black wire with a white socket hanging there and coming from de thick kabel
A brown /white and black kabel leading to the female socket
What is its use?

 

I believe that's used by the dealer when the car is new and not used after that. So you can just ignore it!

 

I just changed the battery on my 2014 XFR yesterday

Kept the vehicle running. Swapped out the old battery with the new one.

zero problems, zero messages/warnings on the dash, zero malfunctions or anything unusual. Actually, I didn't lose any info/settings from the vehicle's memory. All seats/windows work 100% as they did.

I don't know if my method is the right way or not. However, I have been doing this with pretty much every car I have ever owned and never a single hiccup. The only vehicle I would be hesitant to do it this way or without the proper tools is any BMW with the BMW efficiency dynamics as I know those vehicle MUST register a new batter via a BMW ISTA software (kinda like Jaguar's SDD)