Guest Posted May 13, 2022 Share Posted May 13, 2022 OK, so not using the chariot much these days fiesta 2019 mk8 Had the features disabled to conserve battery message the other day 聽 Bought a charger, charged up, went for a 70 mile cruise 馃檪 noticed start stop not working "Think" i reset battery lights on flash 5 times tap break light 5 times battery warning light flashed 3 times聽 & now neighbours think a blonde bimbo is driving my car 馃檪 start stop don't appear to be working I noticed. checked battery with multimeter 12.38v engine not runningrunning this will probably be reoccurring seen as I hate driving, anyway to find out quickly when I need to attach the battery charger? Please Fanks Quote Link to comment Share on other sites More sharing options...
StephenFord Posted May 13, 2022 Share Posted May 13, 2022 Start/stop not working?? (it rarely does) LOL @unofix will be along shortly... 1 Quote Link to comment Share on other sites More sharing options...
Guest Posted May 13, 2022 Share Posted May 13, 2022 1 hour ago, StephenFord said: Start/stop not working?? (it rarely does) LOL @unofix will be along shortly... I think my start stop, has started to stop 馃檪 Quote Link to comment Share on other sites More sharing options...
StephenFord Posted May 13, 2022 Share Posted May 13, 2022 Have a read at this:- 聽 1 Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted May 14, 2022 Share Posted May 14, 2022 11 hours ago, Mark120160 said: I think my start stop, has started to stop 馃檪 Stop start starting to stop is definitely preferable to the engine stopping to start!!聽 聽 Quote Link to comment Share on other sites More sharing options...
Paulius55 Posted May 14, 2022 Share Posted May 14, 2022 The stop/start (and other things) will not work consistently because, in the quest to publish low emissions, the system does not allow your battery to be fully charged as it would cause slightly more drag on the alternator if charging fully. In most cases the system is set to charge to 80% State Of Charge (SOC) and with low temperatures and low mileage, even this figure may not be reached and so the system then switches off things that cause a significant draw on the battery such as Stop/Start and Heated Screen. However, what a number of us have done with Forscan is to change the SOC to a higher figure. I have set mine to 90%, others have set it to 95%, but it really doesn't matter. This allows the system to charge the battery more fully and all the electrical things now work consistently. As an alternative you could put the battery on a smart charger when you are not using it, as long as you remember to put the positive lead onto the battery positive and the negative lead onto a chassis earth,聽not聽the battery negative, or the Battery Monitoring System (BMS) is bypassed and the system will not know that the battery has been charged. Changing the SOC is easiest, in my view, as it's a "do it once and forget about it" job, rather than having to connect a charger every day or so. It is easy to do with Forscan, or even easier if you can find someone nearby with Forscan to do it for you. Anytime you are in Northamptonshire I can do it! I am sure there are others closer to yourselves. Quote Link to comment Share on other sites More sharing options...
Guest Posted May 14, 2022 Share Posted May 14, 2022 17 minutes ago, Paulius55 said: The stop/start (and other things) will not work consistently because, in the quest to publish low emissions, the system does not allow your battery to be fully charged as it would cause slightly more drag on the alternator if charging fully. In most cases the system is set to charge to 80% State Of Charge (SOC) and with low temperatures and low mileage, even this figure may not be reached and so the system then switches off things that cause a significant draw on the battery such as Stop/Start and Heated Screen. However, what a number of us have done with Forscan is to change the SOC to a higher figure. I have set mine to 90%, others have set it to 95%, but it really doesn't matter. This allows the system to charge the battery more fully and all the electrical things now work consistently. As an alternative you could put the battery on a smart charger when you are not using it, as long as you remember to put the positive lead onto the battery positive and the negative lead onto a chassis earth,聽not聽the battery negative, or the Battery Monitoring System (BMS) is bypassed and the system will not know that the battery has been charged. Changing the SOC is easiest, in my view, as it's a "do it once and forget about it" job, rather than having to connect a charger every day or so. It is easy to do with Forscan, or even easier if you can find someone nearby with Forscan to do it for you. Anytime you are in Northamptonshire I can do it! I am sure there are others closer to yourselves. Thanks for your explanation, so is connecting negative here ok? Or just find a nut on chassis? Thanks Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted May 15, 2022 Share Posted May 15, 2022 22 hours ago, Mark120160 said: Thanks for your explanation, so is connecting negative here ok? Or just find a nut on chassis? Thanks That's the correct place to connect the clip.聽 Though it doesn't look very secure at that angle, the more contact you can get between the clip and the metal the better. 1 Quote Link to comment Share on other sites More sharing options...
Paulius55 Posted May 15, 2022 Share Posted May 15, 2022 That place is ok. If it were me and I was going to be putting a charger on regularly I would put a permanent fly lead onto the battery and chassis to make connection quicker, easier and more secure. This is what I have in my car, although since increasing the SOC to 90% I have never needed to use the charger again. 1 Quote Link to comment Share on other sites More sharing options...
cjay1 Posted May 15, 2022 Share Posted May 15, 2022 Can the soc be increased to 90% on the mk 7.5? i have looked in forscan but couldn't find a setting to change. I know this can reduce overall battery life in some conditions but as the vehicle doesn't do many miles it shouldn't be an issue in my case. It would be nice to not need to keep topping up the battery. Quote Link to comment Share on other sites More sharing options...
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