this morning went out to car and the battery was flat. multimeter on it and it read 10.6v it has been parked up since sunday. jump started it and did 49 miles. the car has started no problem all day. came home again another 49 miles parked up. got back in 5 mins later and dash was showing low battery warning. checked the battery and it was at 12.5v the garage I was at tested the battery and said it was ok. however since then the low battery has been coming on each time I go to start.
Is this the battery or something else,
5th Apr 2016 2:59 pm
lespes
Member Since: 17 Sep 2009
Location: Sitting Down
Posts: 2232
Have found that when a battery gets discharged for whatever reason, (doors left open, lights, playing radio etc) it seems to confuse the BMS system as to what state of charge the battery has.
Would try a hard reset, can do no harm or cost anything, details in Wiki before buying a new battery or checking alternator:thumbsup:D4 Landmark MY16 Santorini Black THE LAST
D4 HSE MY12 Marmais Teal: Gone. Missed a lot!
Freelander 2 SD HSE MY11 Silver:Thankfully gone.
D4 HSE MY11 Silver: Gone missed !
Range Rover Sport MY06 HSE Buck Blue: Gone missed!
Discovery D2 TD5 Facelift MY Red Gone Missed!
Discovery D2 TD5 Cobalt Blue: Gone Missed!
Discovery D1 Auto Oxford Blue Not missed at all!
Discovery D1 Avalon Blue First LR! missed!
Now demoted to a VW
5th Apr 2016 5:10 pm
Deanos_Beano
Member Since: 21 Feb 2016
Location: Lancashire
Posts: 563
Defo not low battery in key fob ?
I had a prob with main battery and fixed it then rather untimely the key fob battery warning appeared , I hadnt noticed through the red mist it was now a diff low battery warning
After a phone call with Bodsy (thankyou for the time) I decided to replace the battery as I have a 3am start to the airport and couldn't risk it. after all it is the original battery so 6 years old so fingers crossed the problem might be solved, only the morning will tell
5th Apr 2016 6:49 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8230
Not all new batteries come fully charged, I would have a battery charger on as long as possible in the meantime or have your old battery with you and jump leads ready just in case for an important journey It can when others can't,
It will when others won't,
It goes where others don't.
All sorted car started no bother this morning and no warning messages, so looks like that did the trick
6th Apr 2016 3:52 am
viethson
Member Since: 13 Jan 2009
Location: Bavaria
Posts: 136
Could it be the BMS only charges up to arounf half full? After a five hour drive the IID tool showed SOC 51% and a 1Amp load current. When the batery was one down do 25% the charge was 20Amp Life in the slow lane
6th Apr 2016 8:48 am
promitheus
Member Since: 04 Jul 2009
Location: Afidnes, Greece
Posts: 572
viethson, I would like to check my battery as well, as I have similar issues. Can you please tell me how I find SOC and load amp on my IID tool? Thanks
21st Apr 2016 10:16 am
viethson
Member Since: 13 Jan 2009
Location: Bavaria
Posts: 136
Go to live values. You will find it among others under Body Control Module BCM.
If you check while the engine is running you will find the charging current under vehicle battery current.
If you have a SOC well over 50% then please post the charging current Life in the slow lane
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