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Discussion Starter #1
Hi all, my new to me 66 plate MK2 titanium has decided not to stop/start anymore. Had a similar problem with an Insignia which was the battery.
I did a long run yesterday to see if it would help, but it didn't, I checked the battery this morning and it was only 12v
So the car came with a 3 month warranty from the dealer, read the small print and the battery isn't covered.
My local car part shop want £155 for a battery, Halfords are £115, can anyone recommend a replacement cheaper? or should I be expecting to pay around this.

Thanks in advance

Cliff
 

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Discussion Starter #3
Thanks Nigelb I'm about miffed that the warranty doesn't cover it the battery is well greased I suspect that it has been taken off charged and refitted very recently might just give the dealer a ring for there view
 

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TBH four years is about the limit for a battery nowadays.

Miffs me a bit as I trained as an electrical engineer specialising in secondary cells and it is relatively easy to design a battery that lasts for ten years or more (some of our NiCads had a design life of 15 years). The problem is the cost in that manufacturers will fit the cheapest that they can get away with.
 

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If you think the battery has been taken off and charged and refitted, then you may need to carry out a Battery Monitoring Reset.

Apparently this works on the Kuga..(tried to find the recent post that confirmed it did.)

This was a procedure I'd found in 2017 for Mondeos to reset BMS (thanks to TalkFord community)

1. Get in to the car and do all from points 2 to 4 within 10 seconds.
2. Turn on ignition with engine off (key in position II) .
3. Turn on and of 5 times rear fog light switch .
4. Turn on and of 3 times hazard light switch .
5. If everything goes OK battery light will flash 3 times on cluster within next 15 seconds.
6. Resetting BMS counter finish.
 

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If not a key start, press the start button without your foot on brake/clutch pedal, this will power up your ignition without starting the car.
 

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If the battery is still starting it fine then I wouldn't be paying for a new battery just because stop/ start isn't working.

Reseting the BMS to a new battery probably isn't a good move either. Charge it in situ so the BMS logs the charging current. If you've got the gear to run ForScan see what it is saying the SOC (State of Charge) of the battery is. I also found my battery took a couple of days to fully charge- even after the charger said it was full.
 

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Sorry CAB I missed amending/adding that line where if its keyless, use start button without any pedals pressed. Someone on here confirmed it worked and their stop start began to work. If the reset does work for you, I'd then leave the Kuga for at least 10 hours, perhaps overnight.
 

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Discussion Starter #10
So what is the procedure for?
If the battery is low, should be a minimum of 12.6v and mine is only 12v, is it pointless?
 

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So what is the procedure for?
They've got a complicated BMS (Battery Management System) which controls the charging and discharging of the battery. The BMS is fitted to help improve fuel economy, it controls the alternator output too. One parameter it uses in it's calculations is the battery's age (as battery capacity and other characteristics change with age)- resetting the BMS is telling it you've fitted a new battery. Not a good idea IMHO.

Charge the battery using the negative terminal on the suspension strut tower and the positive on the battery. Charging that way keeps the BMS sensor in the circuit (a small module on the negative lead terminal) so the BMS knows the battery is being charged. Like I said, my 4yo battery took a couple of days to fully charge. The charger said it was full after about 6hrs. I was checking the SOC via ForScan- it gives you the BMS stats.
 

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BTW the SOC can only be accurately calculated if the vehicle is left sitting for more than 3 hours with less than 100mA being drawn from the battery. If your vehicle has accessories drawing current when it's locked (eg. cigarette lighter socket chargers) then the SOC calculation will be wrong. It needs to do that calculation at least once every 7 days IIRC.
 

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Discussion Starter #13
Thanks murcod, I was thinking I would have to remove the battery to try to charge it, do I need to remove the live terminal? I never have had a problem with a modern car sorry if the question is stupid
 

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Discussion Starter #14
Update. Got to speak to a manager at the dealership, he is prepared to refund for the replacement of the battery. I am taking it down later to local Halfords autocentre who will do it tomorrow, will keep you posted
 

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do I need to remove the live terminal?
No. I charge mine with the battery charger connected to the earth point on the suspension strut tower and the positive battery terminal- nothing needs to be disconnected. Make sure you use a decent three stage charger or else keep a close eye on what's happening.
 

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Discussion Starter #16
Ok battery replaced, stop start working, for now, as we can't go anywhere because of the coronavirus it probably won't work soon. Also the dealership I bought it from has shut for now so look like waiting for the refund, hey ho, stay safe everyone, my line of work has me still going into houses every day 😝
 

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Ok battery replaced, stop start working, for now, as we can't go anywhere because of the coronavirus it probably won't work soon. Also the dealership I bought it from has shut for now so look like waiting for the refund, hey ho, stay safe everyone, my line of work has me still going into houses every day 😝
Glad it's sorted.

You stay safe as well!
 
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