Stop/Start again a few thoughts

Faults and Technical chat for the Jaguar XE
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Wastegate84
Posts: 232
Joined: Wed Oct 28, 2015 9:29 pm

Re: Stop/Start again a few thoughts

Post by Wastegate84 » Sun Sep 16, 2018 2:46 pm

The start stop in my XE has worked every time for the last 3 years. No issues whatsoever.

People are reporting faults which aren't faults.

1. If you do a lot of short journeys then don't expect it to work all the time. The battery will take enough abuse as is, there's nothing wrong with the capacity of it or the suitability of the charging system.
2. If you set the climate control on to a very low temperature and have a slow fan speed then it will never kick in as the climate control will send out an inhibit.
3. Same as above but in winter selecting a very high temperature.
4. Using heated seats and rear screen.
5. If you do short journeys and the car is struggling to regenerate the DPF for the diesels, the system will inhibit start stop.

All of the loan cars I've had, believe me I've had at least a dozen have never had issues with start stop. The MY18 XF I have at the moment has a handy symbol to show when start stop is automatically inhibited. I normally see this when the car is trying to warm up the interior in the first 5 minutes of the journey.

Bear in mind only a handful of 'Fiesta's' or the like are diesel and have climate control so the chances of start stop working are statistically much much higher.


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Vespa
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Location: North West UK

Re: Stop/Start again a few thoughts

Post by Vespa » Sun Sep 16, 2018 2:53 pm

Wastegate84 wrote:
Sun Sep 16, 2018 2:46 pm
The start stop in my XE has worked every time for the last 3 years. No issues whatsoever.

People are reporting faults which aren't faults.

1. If you do a lot of short journeys then don't expect it to work all the time. The battery will take enough abuse as is, there's nothing wrong with the capacity of it or the suitability of the charging system.
2. If you set the climate control on to a very low temperature and have a slow fan speed then it will never kick in as the climate control will send out an inhibit.
3. Same as above but in winter selecting a very high temperature.
4. Using heated seats and rear screen.
5. If you do short journeys and the car is struggling to regenerate the DPF for the diesels, the system will inhibit start stop.

All of the loan cars I've had, believe me I've had at least a dozen have never had issues with start stop. The MY18 XF I have at the moment has a handy symbol to show when start stop is automatically inhibited. I normally see this when the car is trying to warm up the interior in the first 5 minutes of the journey.

Bear in mind only a handful of 'Fiesta's' or the like are diesel and have climate control so the chances of start stop working are statistically much much higher.
Points taken and mentioned many times by many people. My car when working will work in most conditions once the engine reaches a set temp and that is not the full temp with climate control on. It has become vastly more reliable since a double recon in the early summer. Tomaorrow it will ahve sat 4 days without moving from the driveway so I will see if it works OK again.
180 diesel XE R Sport, with many extras :D and working stop/start :lol: Made to work Feb 2019 by me


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Repairman
Posts: 439
Joined: Thu Jul 13, 2017 8:06 pm
Location: Dorset

Re: Stop/Start again a few thoughts

Post by Repairman » Sun Sep 16, 2018 5:49 pm

Wastegate84 wrote:
Sun Sep 16, 2018 2:46 pm
The start stop in my XE has worked every time for the last 3 years. No issues whatsoever.

People are reporting faults which aren't faults.

1. If you do a lot of short journeys then don't expect it to work all the time. The battery will take enough abuse as is, there's nothing wrong with the capacity of it or the suitability of the charging system.
2. If you set the climate control on to a very low temperature and have a slow fan speed then it will never kick in as the climate control will send out an inhibit.
3. Same as above but in winter selecting a very high temperature.
4. Using heated seats and rear screen.
5. If you do short journeys and the car is struggling to regenerate the DPF for the diesels, the system will inhibit start stop.

All of the loan cars I've had, believe me I've had at least a dozen have never had issues with start stop. The MY18 XF I have at the moment has a handy symbol to show when start stop is automatically inhibited. I normally see this when the car is trying to warm up the interior in the first 5 minutes of the journey.

Bear in mind only a handful of 'Fiesta's' or the like are diesel and have climate control so the chances of start stop working are statistically much much higher.
I would agree that there should be certain times when it won't work, doesn't explain why recently, with all heated screens, Heating, and heated seats it worked for that journey, and not at all other times, when nothing was turned on, not even radio/satnav, I tried turning screen off as well, strange.

My friend has a 2.0D Skoda Octavia, and S/S works all the time, even when all functions like heating/air con, heated seats etc is turned on
2016 XF Portfolio in British Racing Green. previous 2016 XE R-Sport in Italian Racing Red


Wastegate84
Posts: 232
Joined: Wed Oct 28, 2015 9:29 pm

Re: Stop/Start again a few thoughts

Post by Wastegate84 » Sun Sep 16, 2018 5:52 pm

If it doesn't have digital climate control then it might well do. Personally I'm happy that if the car is trying to heat or cool the interior I'd rather have the engine running. Luckily I'm also in a manual so I can control when I actually want it to stop, only at long red lights for example. The auto drives me nuts switching off at every junction - first thing I do is switch it off for obvious reasons!


BrianS
Posts: 126
Joined: Tue Oct 10, 2017 8:17 pm
Location: London

Re: Stop/Start again a few thoughts

Post by BrianS » Sun Sep 16, 2018 11:01 pm

This is the second jag i've had where it works fine for 4 or 5 months and then never again. I understand short journeys will inhibit it but I have recently had a holiday involving driving from london to wales and back together with one hour journeys whilst there, london to bournemouth and back and various other medium journeys. I think the hot weather causing the air con to be running all the time (not at an excessively cold temperature of 21.5C) is too much for the battery ever to recover enough without being re-charged. The battery is just not big enough compared to others cars whose owners say they never have a problem despite whatever is running and how short the journeys. Jaguar really should have sorted this out has been a problem for a long time. I think it is a pain in the arse so doesn't bother me not working but just an example of Jaguar just not quite making the grade
XE 250PS Portfolio 67 Narvic Black, Pro system, parking pack


DaveP
Posts: 9
Joined: Mon Aug 27, 2018 6:56 am
Location: Shropshire

Re: Stop/Start again a few thoughts

Post by DaveP » Mon Sep 17, 2018 7:05 am

I don't think this issue is specific to Jaguar. My wife has a Mercedes GLC 220 and the S/S on that rarely works.


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julian
Posts: 181
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Location: Belgium

Re: Stop/Start again a few thoughts

Post by julian » Mon Sep 17, 2018 9:22 am

Wastegate84 wrote:
Sun Sep 16, 2018 2:46 pm
The start stop in my XE has worked every time for the last 3 years. No issues whatsoever.

People are reporting faults which aren't faults.

1. If you do a lot of short journeys then don't expect it to work all the time. The battery will take enough abuse as is, there's nothing wrong with the capacity of it or the suitability of the charging system.
2. If you set the climate control on to a very low temperature and have a slow fan speed then it will never kick in as the climate control will send out an inhibit.
3. Same as above but in winter selecting a very high temperature.
4. Using heated seats and rear screen.
5. If you do short journeys and the car is struggling to regenerate the DPF for the diesels, the system will inhibit start stop.

All of the loan cars I've had, believe me I've had at least a dozen have never had issues with start stop. The MY18 XF I have at the moment has a handy symbol to show when start stop is automatically inhibited. I normally see this when the car is trying to warm up the interior in the first 5 minutes of the journey.

Bear in mind only a handful of 'Fiesta's' or the like are diesel and have climate control so the chances of start stop working are statistically much much higher.
Although I agree with the reasons you mention for S/S not kicking in, my experience says that battery plays an important role.
S/S irregularities / absence started 1 month after I got the (new) car and continued for 2 years. They changed the battery in May and since then S/S works as a Swiss clock. I didn't change my routine of short trips or my way of driving. The new battery was 85Ah, no need for a bigger one.
The explanation I got from JLR is that alternator charges as less as possible for "polar bear" reasons and there are batteries more adapted for that.
MY17 180d auto R-Sport Odyssey Red
ICTP - 40/20/40 - 14X14 - BSM - RC - XHL


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Vespa
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Re: Stop/Start again a few thoughts

Post by Vespa » Mon Sep 17, 2018 10:23 am

Firstly from my reply yesterday. The S/S worked perfectly today after the car was not driven for 4 days. The remote engine start had been inhibited as the car was in sleep mode so at least I know that the car is operating correctly to preserve battery charge. Also the standard battery is 80 Ah not 85Ah, so if an 85Ah battery has been fitted to your car Julian, and all is well that extra bit of capacity may just be what is needed. This is a mystery that I am sure will carry on and all the input so far is very useful. Perhaps JLR should look at it all and then come up with a solution. There is enough evidence to show that there is a problem with many XE's.
180 diesel XE R Sport, with many extras :D and working stop/start :lol: Made to work Feb 2019 by me


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julian
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Location: Belgium

Re: Stop/Start again a few thoughts

Post by julian » Mon Sep 17, 2018 10:25 am

Vespa wrote:
Mon Sep 17, 2018 10:23 am
Firstly from my reply yesterday. The S/S worked perfectly today after the car was not driven for 4 days. The remote engine start had been inhibited as the car was in sleep mode so at least I know that the car is operating correctly to preserve battery charge. Also the standard battery is 80 Ah not 85Ah, so if an 85Ah battery has been fitted to your car Julian, and all is well that extra bit of capacity may just be what is needed. This is a mystery that I am sure will carry on and all the input so far is very useful. Perhaps JLR should look at it all and then come up with a solution. There is enough evidence to show that there is a problem with many XE's.
My mistake, 80Ah, not 85Ah. Same as original
MY17 180d auto R-Sport Odyssey Red
ICTP - 40/20/40 - 14X14 - BSM - RC - XHL


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Vespa
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Location: North West UK

Re: Stop/Start again a few thoughts

Post by Vespa » Mon Sep 17, 2018 10:37 am

OK no problems and I am pleased that you have a fully functional S/S system. I think mine is not too far off being OK now after that double recondition earlier in the year as today would have been the tell tale sign if it hadn't worked after the 4 days of non use. I am just pernickity regarding things that should work if fitted. I remember spending around 10 hours trying to get my racing bike wheels 100% true and eventually found out that the original wheel builder had fitted several wrong size spokes which stopped the perfect truing of the rear wheel.
180 diesel XE R Sport, with many extras :D and working stop/start :lol: Made to work Feb 2019 by me


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