Thanks Thermo I had No Idea! This alone is enough to Not to Buy +2013

 

Another reason to avoid recent years is the upcoming 3G debacle. I have no idea which years it will affect but there will be blood as they say.

Thankfully my 2011 is only just a car and not a connected entertainment appliance.

 

The stop/start can be disabled. The early system with 2 batteries is very simple. Just unhook the small battery. The later system used a capacitor setup and people have figured out which plug to unhook to disable it.

I agree it is very out of character for a high end luxury car to go into all those conniptions at a stop light. Rough and ragged is my best description. After a few years it also turned out to be failure prone. My small battery failed and I replaced it. Now mine has failed again and I did not know it until Brutal posted about it and then I noticed it had not operated for several months. I hooked up my SDD and sure enough I have only one code and it's for the stop-start system.

I don't plan to fix it either. The biggest improvement for the 2013+ cars was getting the 8 speed transmission. That does help with gas mileage and power delivery. The 8 speed is really a great transmission overall.
.
.
.

 

start stop is very easy to tune out, any tuner can do it. Or just leave the car in Dynamic, it will be disabled. The 3G thing is really nothing to worry about, there is a fix that Jag is putting into place that will supplement the loss of 3G. My 2015 never uses any connected services anyways, so I do not care one bit if I lost 3G.

 

Also in 2013 the electrical system was changed to Bosch. Here is the 2013 Product Brief sent to dealers.

 

Yes and apparently those electrical updates help a lot!
My 2014 XJR has had none of the strange battery/electrical problems I constantly read about on the earlier cars.
After reading the updates I don't know exactly what they did as there is not any details.

Heck I still have the factory battery and it's 9+ years old! I never get any low battery warnings and I can leave the car for weeks at a time and it starts fine with no errors. My record is 6 weeks parked at the airport when I had to stay with my injured Mom for a much longer time that I expected. The small start/stop battery did rot the positive battery terminal clean off! So I did replace the small expensive battery.
.
.
.

 

Any guesses about whether any of the updated Bosch bits are drop fits into older cars?

 

Hopefully whatever Jaguar does won't be similar to the Audi "fix" that requires using the OBD port (so you can't anymore).

Also none of the "fixes" will come for free from the auto makers. Designed obsolescence is their strategy nowadays.

It's expected that the 3G mess will affect your resale value long term. But it's not like these cars hold their value that well anyway.

Hopefully some regulatory control will come of this so that future connected vehicles don't suffer the same situation when 4G dies. Or 5G. Or...

And don't kid yourself that your "connected" time isn't already being tracked and sold by OEMs. The unethical marketing hoards will pay good money for that.

 

As an Audi owner we have both a 2022 and 2018 SQ5s. The 2018 had the 3g and the fix puts a dongle on the OBD2 connector that then links to you phone and restores the lost functionality at no cost to owner.

 

Since the start/stop system was to reduce emissions and improve gas mileage as per government mandates I am surprised you can turn this off? Can you also program the check engine light to stay off? Seems like the governments would not want to allow this level of modification since it affects the published emission and fuel mileage rating of that model of car?
.
.
.

 

Apologies for further hijacking this thread but there was mention that this (stop/start) could be disabled on the newer XJs (the MY without the second battery). I searched on the forum but only found reference to the F-Pace and XF models but nothing specific to the XJ. Does anyone know how this can be disabled on a 2017 XJ R-Sport model? I try to get in the habit of disabling each time I start the car but often forget until the dreaded shutdown occurs. I don't mind the concept too much but the implementation for these cars is awful. Shudders to a stop and shudders again when starting back up. I had 2 Jaguar dealers look at it to see if this is how it was supposed to function and both came back with the infamous "they all do that". I had understood there was no easy way to disable other than through internal programming for the later model years.
Cheers
Kevin

 

Thanks Chaos. This puts the MY12+ models back in the for-sale lookups unless driving is Dynamic all the time has some detrimental effects or not recommended

 

If you enable Dynamic mode though does this stick when you shutdown the car and restart it? Not sure but I think it reverts back to normal mode so you would have to reengage Dynamic mode every time (so may as well just hit the ECO button to disable the stop/start function if that is what you are trying to achieve)? Could be mistaken there about Dynamic though.
Cheers
Kevin

 

Thanks Kevin, I don't mind pressing a button every time I start the car to avoid this ridiculous function. I don't see the ECON button in the console, I only see CheckeredFlag button and the S on the J-wheel

 

This is where it is located on my 2017. Not sure if it is dependant on model year though.
Cheers
Kevin

 

Yes it is different. Wonder if it is the Mode button. But Nice to see that you have manual button for a/c vent flow direction

 

It sticks for what seems like 12 hours or 24 hours. If I set it on my drive home in the evening, sometimes it still is active in the morning. My stop start is permanently disabled with my VAP tune.

 

Appreciate your reply. Sounds like we do not have an easy option to disable on the later XJ models. Here is a discussion from the F-Pace folks so just wondered if something similar for the XJ.
Thanks again
Kevin
https://www.jaguarforums.com/forum/f...f-pace-167370/

 

2016 and above has an even easier option to disable it.
Post #22
How I did it for a 2016 XJ...
Remove the trunk floor exposing the battery, spare, etc.
At the back end (towards front of car) of the battery is a thin, rectangular, silver module attached to a bracket. Several wired plugs are attached to the face of this module. The small black plug closest to you, with the SMALL GAUGE colored wires, can be unplugged. Secure this disconnected plug.
When you start the car, after about 30 secs., the "ECO OFF" light will illuminate in your dash.
No more stop/start, and no problems for me so far! Let me know if this works for you too, or if you notice any other issues...
Good luck!

https://www.jaguarforums.com/forum/x...-182451/page2/

 

My car stays in Dynamic and sports mode every time I get into it and I've never had the stop/start not work because I'm in dynamic.
I've just gotten used to pressing three buttons before I pull off.
I think of myself as a fighter pilot doing pre-flight checks lol.