So when/if my battery runs flat - The time for ECU to 're-learn' my driving characteristics is much longer than 10-15 km .. typical 250-300 km before it run normal again..
Is there a Way / tool to re- program ECU after battery disconnect , so I Can skib re-learn mode ?
Btw I have a XKR 99’ with 2006 4.2 Block .
Thanks

 

I don't think you can force the relearn. The biggest issue is that it takes some time for the cars to run through the pollution control routines to reset the evap and a few other codes. Never disconnect the battery right before a smog test (I learned the hard way).

 

i have recently disconnected my Walmart 3 year old Everstart Max for well over a week after deep charging it with a 10 amp charger and it's been on a CTEK maintainer for 4 days. My Voltage is well over 12.66 after taking it off the maintainer, so I'm good to go again. This is my first time I have disconnected the battery for this long a period of time. I'm ok with resetting my seat and radio settings and relearning my driving style. What I'm really concerned about it the automatic window slight lowering when opening and closing the doors. Are those settings affected as well and will they need to be reprogrammed?

 

Yes, you need to reset both windows to properly index them. The reset procedure is easy. Lower the window, and release the switch. Then hold the switch down for 5 seconds. Raise the window and release the switch. Then hold the switch up for 5 seconds and release. Test one-touch down and one-touch up operation. Repeat for the other side.

If that doesn't work, then you probably have a bad window regulator or an obstruction in that window track. Ask me how I know, from 2011:
https://www.jaguarforums.com/forum/x...bration-57518/

 

Thanks Stuart. All windows have been reset. Quite easy.

 

should I keep the voltage active when replacing the battery? I hear that the computer will not recognize the new battery and overcharge it .
If I keep the voltage up during the change so as not to erase the memory ???

 

About the only thing you will lose is the Window Travel, which will need to be reset. That takes literally 20 seconds.
If the battery is off for an extended period, you may lose your Learned Driving Style and your Long Term Fuel Trims. Those relearn by themselves, and is sometimes beneficial.
Don't worry about the Battery System, it will relearn the new battery in a short time. Course, if you DO have availability of a system to reset the BMS, it won't hurt.

 

Thank You , guess I was overthinking everything

 

Hi

ive got a problem with my XKR4.2 supercharged roof as will not operate due to message coming up hood open been told the battery is knackered and that’s the main problem also got told that there is a smaller battery in the motor somewhere but I can’t find it think the mechanic is having me over as says he don’t know where it is either have tried to manually drop the roof but only goes so far and stops don’t want to force it incase I break something asking all you experienced members if anyone knows why it’s doing this if I bought a brand new battery would this kinda help it out and is there a smaller second battery in her somewhere ????

thanks
howard hill

 

Welcome to the forums Howard,

The vehicle only has one battery. Expected life is around five years and a failing or partially discharged battery is notorious for causing all kinds of weird electrical faults. However, an ill-informed mechanic can be even more of a problem.

I've never had a convertible and will leave it to members with this variant to advise on whether this issue is battery related, possible causes and solutions.

Graham

 

I acknowledge the attempt to be casual and informal. However, punctuation would be helpful in getting to the root of what is being asked.

 

This saves so much pain and time, thank you! the battery in the convertible 2007 XKR is now much easier to replace.