Stop/Start again a few thoughts

Faults and Technical chat for the Jaguar XE
Bluefire65
Posts: 427
Joined: Sun Jun 07, 2015 9:35 pm
Location: South Champshire

Re: Stop/Start again a few thoughts

Post by Bluefire65 » Sat Jun 24, 2017 3:03 pm

After having had the battery/stop-start related updates applied at last service in November, I had high hopes that prolonged periods of the disappearing act would be at an end. Alas, it lasted a month or so and then bye bye; occasionally reappearing the first couple of journeys after a minimum of 200 mile round trips. Even after an 800 mile round trip to Newcastle and Ambleside, it re-appeared at the end of the last leg and only stayed for the next two short trips.

In the original thread on this topic several owners reported no such issues, irrespective of journey pattern, which make me think it's down to a faulty component affecting some vehicles but whether it's worth depositing the car with the dealer for several days for further investigation I doubt. Unless someone can pinpoint the component that needs to be replaced then I'll live or die with it as it is.
Portfolio 240PS: Bluefire, Gloss black side vents and exhaust tips, Sienna Tan, 18" Star 5 spoke wheels, Surround Cameras plus bits and bobs. Now P/Xd for F-Pace


User avatar
Vespa
Posts: 3877
Joined: Sun Oct 11, 2015 10:50 am
Location: North West UK

Re: Stop/Start again a few thoughts

Post by Vespa » Sat Jun 24, 2017 3:18 pm

Bluefire, I can confirm 100% that the regeneration has solved my problem with the S/S. It's a shame it has to be done but my dealer says that they do the same to get the S/S working again. The battery is one which needs gas released every now and again from the plates. The regeneration does this. It took 9 hours to charge mine and regenerate it. I got my C-Tek MXS 5 from Amazon at £58. I will say that really we shouldn't need to do this but that is how these batteries work. Charge is not continually put from the alternator into the battery, only when the battery management system lets it. Nothing like older cars.
180 diesel XE R Sport, with many extras :D


Bluefire65
Posts: 427
Joined: Sun Jun 07, 2015 9:35 pm
Location: South Champshire

Re: Stop/Start again a few thoughts

Post by Bluefire65 » Sat Jun 24, 2017 5:56 pm

Thanks for the reply Vespa and being an end user totally, I bow to your superior technical knowledge. This said, it still mystifies me why other users appear to have no issues, yet make no mention of regenerating their battery every couple of months or why the manual makes no mention of the need or why the dealer does not offer it at service (at an additional cost of course). If the stop/start needs more battery charge and the battery management system won't let it have any, it sounds to me like the manager needs sacking.
Portfolio 240PS: Bluefire, Gloss black side vents and exhaust tips, Sienna Tan, 18" Star 5 spoke wheels, Surround Cameras plus bits and bobs. Now P/Xd for F-Pace


BOBCDP
Posts: 339
Joined: Wed Jun 22, 2016 8:51 pm
Location: Vale of Glamorgan

Re: Stop/Start again a few thoughts

Post by BOBCDP » Fri Aug 04, 2017 5:22 pm

I was having a read through this post earlier as I really had no idea at all how the Stop/Start technology works or in my case doesn't work as I switch it off as soon as I get in the car.

Our of interest and a having a couple of hours to spare (good this retirement thing) I did some further reading on other sites and found out quite a lot of stuff I wasn't aware of.

According the this link: (http://www.varta-automotive.com/en-gb/t ... top-system) during acceleration and normal driving the system stops the alternator charging the battery which then has to run all the electrical load and is therefore discharging until it gets to a level at which the alternator is told kick in again. It also says that even with a partially discharged battery, the Stop/Start should still operate when required.

When you brake, the system uses the energy produced to send a charge to the battery. This must be similar to the KERS system used on F1 cars.

All good so far but why are so many people getting problems with Stop/Start and why on earth when you have bought a top quality, state of the art, modern car, should you need to go to Amazon and buy a special charger to keep the battery in good condition?

This link goes back to 2011 but it does make interesting reading and maybe provides some of the answers: http://www.thetruthaboutcars.com/2011/0 ... p-systems/

Also have a look at this one: http://www.thetruthaboutcars.com/2010/0 ... p-systems/
MY16 2015 R-Sport 180d, Auto, Yulong White,


User avatar
Vespa
Posts: 3877
Joined: Sun Oct 11, 2015 10:50 am
Location: North West UK

Re: Stop/Start again a few thoughts

Post by Vespa » Sat Aug 05, 2017 11:28 am

Hello Bob, thank you for your bit of research, it was very interesting. I must agree that having to buy a specialist charger is a bit of a bummer but in does the job. Jaguar must be aware of the failings of these batteries as they offer the similar type charger at an inflated price with the Jaguar logo. The one I bought is a few steps better. Since I gave it the regeneration x2 the S/S system has functioned fully. Having said that we have also had a few long drives at steady speeds. ( my car is fitted with a speed limiter in the passenger seat :D :D ) I am sure that the whole of the car world that fits these batteries has similar problems. My friend who has an Audi A6 also has intermittant S/S working. From what I understand the battery needs a release of hydrogen gas from the mat in each cell to efficiently hold the charge.The regen phase does this on the C Tek charger. I would imagine with mostly town driving the charging is not up to the job and so the battery falls below par and shuts out the S/S.
180 diesel XE R Sport, with many extras :D


User avatar
irishtaff
Posts: 314
Joined: Sat Jul 18, 2015 7:29 pm
Location: Ireland

Re: Stop/Start again a few thoughts

Post by irishtaff » Sun Aug 06, 2017 5:07 pm

Mine has been out of action for about a year...caught me out today at the traffic lights when she switched off again. I haven't changed anything or done any long trips recently.
Prestige 2.0D MY16 180 IRR, Manual, Light Oyster,Sunroof, !8" Matrix silver wheels, Nav, Lighting Pack, Towbar, Rev assist, Spare wheel, Folding mirrors, and rear seats, Meridian Audio. (+ Skoda exhaust trim )


-MICK-
Posts: 69
Joined: Sat Aug 27, 2016 9:02 am

Re: Stop/Start again a few thoughts

Post by -MICK- » Wed Aug 09, 2017 12:14 pm

My stop/Start is perfect.... I disabled it permanently months ago... Problem solved..... :)


User avatar
lexie
Posts: 145
Joined: Sun Mar 13, 2016 5:46 pm
Location: Chichester

Re: Stop/Start again a few thoughts

Post by lexie » Sun Aug 13, 2017 1:43 pm

My stop/start gradually failed from about 8 months old. It was quite random, as I could do long trips of 100+ miles without having any effect, then sometimes it would just work for a few days. My car does a 70 mile motoway round trip every week , so I mentioned it at the first service and the battery was replaced under warranty. It has worked properly ever since.
R-Sport 200ps Ammonite grey, parking pack, split fold rear seats, space saver, 14 way seats


User avatar
Vespa
Posts: 3877
Joined: Sun Oct 11, 2015 10:50 am
Location: North West UK

Re: Stop/Start again a few thoughts

Post by Vespa » Sun Aug 13, 2017 1:55 pm

lexie wrote:
Sun Aug 13, 2017 1:43 pm
My stop/start gradually failed from about 8 months old. It was quite random, as I could do long trips of 100+ miles without having any effect, then sometimes it would just work for a few days. My car does a 70 mile motoway round trip every week , so I mentioned it at the first service and the battery was replaced under warranty. It has worked properly ever since.
Possibly the original battery was in need of a regen charge not available from the car's system. The new battery will be in peak condition and will most likely stay that way with long drives. Mine has been fine since the two regens I did and the S/S works all the time now. I assume because my car probably stood for days (6 months) without much driving before I got it caused my S/S to gradually pack up initially. It has taken quite a while to fathom it out but I am sure that it will be fine now. I will regenerate it at least once a year or maybe every 6 months because of the driving I do.
180 diesel XE R Sport, with many extras :D


User avatar
51mes
Posts: 41
Joined: Sun Aug 13, 2017 9:59 am
Location: Cumbria, UK
Contact:

Re: Stop/Start again a few thoughts

Post by 51mes » Fri Sep 01, 2017 1:11 pm

Question if you don't mind, when you do a regen charge do you disconnect the battery from the car? Not sure how the Jag electronics take to having the battery removed...

I have a ctek that I've used to maintain my boat/sportscar batteries over winters over many years, but much simpler systems.

S.
XE-S in IRR 19" Radiance, red/jet leather, ICP, Meridian Digital, Pan Roof, HUD + extras + lots of carbon fibre :twisted:


Locked

Return to “Faults & Technical”