DISCO4.COM - View topic - Low Battery message after Ctek charge.

NJSS

Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10489

2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo Grey

NoDo$h wrote:-

Quote:
Worth chucking a Foxwell BT100 into your tool kit

Thanks NoDo$h - I've ordered one.

NJSS Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.

10th Dec 2020 9:40 am

ASPGuru

Member Since: 25 Mar 2007
Location: Sheffield
Posts: 100

2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris Grey

Mine also showed low battery, after 2 weeks on the CTEK into the towing socket which showed good indications just prior to Lockdown 2.0.
Voltages looked ok.
Charged directly to the batteries (+ve terminal and chassis earth) and warning went away.

Until this Thursday when the car turned into a disco - discotheque, not discovery, lots of flashing lights and bings & bongs - leaving me with the red battery light on. Charging system fault, consult dealer, said the book.
I knew it couldn't be flat, as I'd done 150 miles the day before fetching daughter back from uni.
Again, voltage seemed fine, which the car agreed with as no low battery warning this time.

Didn't bother the stealer, but dropped a new battery in on Friday am, and everything was sweetness and light again. I'd bought the battery after the first issue, just never got round to fitting it as all seemed well.

As a bonus, my cheapy ebay power socket volt meter now shows that the alternator really does vary voltage depending on engine load. Previously, I only ever saw 14.7 volts displayed, with the engine running.

I suspect the battery is the original (Feb 2015) and was iffy when I bought it 3 and a bit years ago.
Having read other related posts on here just surprised that it lasted as long as it did.

Cheers,

Mark ~~19?? Lightweight 3.5V8~~
~~1977 109" FFR~~
~~1987 110 CSW DT~~
~~1991 Discovery 200TDi~~
~~2000 Defender 110 CSW Td5~~
~~2004 VW Caravelle, that we won't talk about~~
~~2015 Discovery SE Tech 3.0 SDV6 Aruba Gold~~
2016 Discovery Graphite 3.0 SDV6 Corris Grey

12th Dec 2020 7:30 pm

NJSS

Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10489

Thanks NoDo$h my Foxwell BT100 arrived this morning & has been put to work already.

D4 will be on charge overnight before an early start tomorrow & Thursday.

NJSS Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.

15th Dec 2020 1:00 pm

DN
D3 Decade

Member Since: 24 Jun 2006
Location: W.London.
Posts: 2294

2006 Discovery 3 TDV6 Base 7 Seat Auto Zambezi Silver

+1 Yes, thanks NoDo$h

.....I also ordered a BT100, which I have had for a few days now. An improvement on my old fashioned ‘drop tester’. Suprisingly, out of the 4 cars in our household, the best battery of the lot, is the original 12.5 yr old Varta battery in my daughters car, all other batteries are much younger

............ Got the D3 on charge now

D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.

15th Dec 2020 2:25 pm

Timbo1975

Member Since: 25 Nov 2019
Location: Shropshire
Posts: 43

2015 Discovery 4 3.0 SDV6 Commercial Auto Causeway Grey

notyalc wrote:
+ve lead on the pos terminal -ve lead on a chassis ground.
Otherwise the BMS gets confused.

^ this.

Alot of charging direct to the battery posts will get the BMS system confused as it records charge and discharge of the battery through the sensor on the neg lead.

Whilst the car sleeps it still uses abit of current from the battery and if its parked long term the BMS will think the battery is say 70% flat, even though you have been charging it.

Connect the charger through the jump-start posts or the body NOT direct to the battery Neg terminal.

This is very common on BMW / Mini etc that have the BMS sensor on the batt neg lead at the battery. 2015 SDV6 Commercial

4th Feb 2021 7:13 pm

lespes

Member Since: 17 Sep 2009
Location: Sitting Down
Posts: 2232

2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini Black

^^^^

and complete a BMS reset first, details in wiki

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 Feb 2021 6:33 pm

Yargo

Member Since: 25 Dec 2020
Location: Europe
Posts: 326

2014 Discovery 4 3.0 SDV6 HSE Auto Java Black

Timbo1975 wrote:

Connect the charger through the jump-start posts or the body NOT direct to the battery Neg terminal.

Could you please explain where are they located on d3 2.7d?

5th Feb 2021 6:43 pm

Gary_P

Member Since: 03 May 2016
Location: Kent
Posts: 1520

2016 Discovery 4 3.0 SDV6 HSE Auto Corris Grey

Quote:
and complete a BMS reset first, details in wiki

Where abouts? Can't find it in the Wiki.
Cheers Gary
-------------------------------------------

Discovery 4 HSE 2016MY

5th Feb 2021 7:51 pm

Yargo

Member Since: 25 Dec 2020
Location: Europe
Posts: 326

Gary,

https://www.disco3.co.uk/wiki/Hard_Reset ?

5th Feb 2021 7:52 pm

Gary_P

Member Since: 03 May 2016
Location: Kent
Posts: 1520

Thanks for the link, however that link is for details of a hard reset not a BMS reset after changing your battery.
Cheers Gary
-------------------------------------------

Discovery 4 HSE 2016MY

5th Feb 2021 11:54 pm

Yargo

Member Since: 25 Dec 2020
Location: Europe
Posts: 326

Doesn`t hard reset, resets BMS ?

Last edited by Yargo on 6th Feb 2021 5:31 pm. Edited 1 time in total

6th Feb 2021 6:21 am

lespes

Member Since: 17 Sep 2009
Location: Sitting Down
Posts: 2232

Hard reset resets BMS

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

6th Feb 2021 5:30 pm

Gary_P

Member Since: 03 May 2016
Location: Kent
Posts: 1520

Thanks.
Think it's a bit of a sledge hammer to crack a nut, if you have a tool capable of actioning a BMS reset. What else does a hard reset do? Gary
-------------------------------------------

Discovery 4 HSE 2016MY

6th Feb 2021 5:35 pm

ronp

Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15213

2014 Discovery 4 3.0 SDV6 HSE Auto Corris Grey

As the OP, just an update to my thread.

I unplugged the ctek, a week later after entering the D4 I expected the “low battery” message and half expected it not to start.
However, no “low battery” message appeared and (as usual) started straight off the button..
Went for a short 10 mile drive (pre lockdown) and stop/start even kicked in.

But already had the D4 pre-booked in to the local garage for diagnostic checks.
Everything came up fine and absolutely nothing wrong with the D4.

Just put it down to a “communication/translation” issue.

I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.

6th Feb 2021 9:09 pm

Gary_P

Member Since: 03 May 2016
Location: Kent
Posts: 1520

Good news. Suggest either leaving on trickle charge , or a longer top up charge every 3 weeks or so if the car isn't used much. Gary
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Discovery 4 HSE 2016MY

7th Feb 2021 12:01 am