brad s1 wrote:

roberlar wrote:

I see your point, and thanks for your input, but assume info in the owners handbook is deemed works capable by the humble owner and it doesn't mention anything other than physical requirements of changing the primary battery

Per the service manual regarding new battery changeover.

"Using Land Rover approved diagnostic equipment, reset the battery monitoring system (BMS)"

Cam-Tech-Craig wrote:

Both batteries and the software update was done when I changed my batteries... Still get the same message back again 18 months later!
It’s probably because I don’t use/drive it enough! I don’t think it’s done 2k since I bought it!

No problem, hopefully that is the remedy to your issue. Let us know.

Thanks Brad, your advice makes sense and I'll post results accordingly

2 Battery, non stop/start VSE, 2014.

I had the low battery warning for a long time despite charging the battery with a c-tek all the time.

I went to an independent LR workshop (Keith Gott, Hants) and chatted to them while they were looking at the problem.

Battery checks they did all looked fine - volts, amps, no load, under load, updated the battery management software etc but still the message.

With no other options seeming available, they changed the main battery and did the new battery reset via the OBD socket.

No problem since, about 4 months ago.

With the original battery apparently fine, that only leaves you with the new battery reset as the solution to the problem.

I wondered if they’d left the old battery in place but told the car it had a new one, if that might have done the trick as well, but heigh ho.

interesting , thank you...  ... - .- -.




Y. O. L. O.
.

Unnecessary quote removed

Having done a bit more research I've read that only the primary battery is monitored and the aux battery is for assistance in cold climate starting or just extra starting oomph as required, plus stop/start if applicable. On the other hand I also read the aux battery operates and maintains certain aspects of the electrical system. And then some people with stop/start say they have disconnected the battery altogether which wouldn't be good if the battery maintained other aspects.

I wouldn't have thought the aux battery would be man enough for starting purposes on its own as it's a fair bit smaller, plus it seems there are different size aux batteries depending on year. Plus I wouldn't have thought the car could differentiate between the state of two batteries and advise accordingly. So given that I have replaced the primary battery, perhaps a reset might be the answer

In the Autel service tool there is a page to reset the back up battery , but I think this is only used for the telematics in the 3.0 models as there is also a routine to reset the telematics themselves after disconnecting / replacing the small battery ( 15 ah agm) the 2nd battery in the v8 cars is huge by comparison !

Cam-Tech-Craig wrote:

Mine has two batteries and NO stop start system... The engine starts from the smaller battery in the side compartment. This is also an AGM battery...

I replaced both my batteries 18 months ago and i still get the low battery warning if i don't use the car is 5 or 6 days!

I can put the car on my CTek trickle charger and it can take 3 days solid for it to reach optimum level, then park it for 72 hrs and the low battery warning will chirp up again!

Our D4 is exactly the same! If not used for 10days or so it will bleep up Low Battery! this can take 3 or 4 days on the CTek to charge to optimal! Although this car has start stop system!
We drove to cornwall recently in the D4. Before we left the Low Battery warning was showing and it took until Falmouth for the stop start system to kick back in so, a good 3 to 4 hours of driving!!! Much more than i thought it would take...

After receiving the "Low battery" message I had a new battery fitted and the message disappeared. A few weeks later it reappeared, so I had the stop/start battery replaced and recoded. Message was gone when I picked the car up. Started it the next day and the "Low battery" message re-appeared and I noticed that the interior lights and courtesy tailgate did not work with the car engine not running. After lots of web searches I decided to take a look at the battery connection. To access the main battery you need to remove the spare wheel. When I lifted the wheel out of the well the interior lights came on, when I put the wheel back in the well I found that when I moved it around I could get the interior lights to go on and off. There was nothing obvious wrong with the cables so I pushed the spare wheel to the front of the wheel well so it was not near the battery terminals and it solved the problem. Bolted it back in place and so far I have not seen the "Low battery" message again. So far so good, fingers crossed. Worth checking I think.

@Alan,
That sounds like a simple poor/loose connection on either of the battery terminals?
i.e. if you bump the battery with the spare wheel, it makes/breaks the connection? “If it ain’t broke, don’t fix it” -where’s the fun in that?

Battery terminals both solid, tight and super clean.