Tommo17 Posted September 20, 2017 Share Posted September 20, 2017 Hi my stop start has stopped working. On the test menu it shows my battery as 11.4v with everything off. Is that healthy enough for the system to work. Done a 20minute trip down the motorway last weekend and had everything off as approaching the city and it still didn't activate. Anyone else had same issue. Or know a fix. Thanks Quote Link to comment Share on other sites More sharing options...
Phil21185 Posted September 20, 2017 Share Posted September 20, 2017 I know mine is reluctant to enter s/s if I have the air con on... 11.4v is a flat battery mate so sounds like your monitoring system is out of whack. There is a procedure for resetting it involving pushing of buttons which might help. @iantt has posted about it before but I'll be buggered if I can find it... Edit: Here is what Ian put in another thread so Kudos to him if it solves your problem: Ron, if you want to have a go at reseting battery monitoring, just do as follows Ign on for 10 secs, press rear foglighr switch 5 times, press hazzard switch 3 times, wait 10 secs. battery light flashes. Ign off use car, and see if thst fixes Full thread here so you can go and thank him! Lol! 2 Quote Link to comment Share on other sites More sharing options...
Tommo17 Posted September 21, 2017 Author Share Posted September 21, 2017 7 hours ago, Phil21185 said: I know mine is reluctant to enter s/s if I have the air con on... 11.4v is a flat battery mate so sounds like your monitoring system is out of whack. There is a procedure for resetting it involving pushing of buttons which might help. @iantt has posted about it before but I'll be buggered if I can find it... Edit: Here is what Ian put in another thread so Kudos to him if it solves your problem: Ron, if you want to have a go at reseting battery monitoring, just do as follows Ign on for 10 secs, press rear foglighr switch 5 times, press hazzard switch 3 times, wait 10 secs. Battery light flashes. Ign off use car, and see if thst fixes Full thread here so you can go and thank him! Lol! I will give that a try. And give that thread a good read thanks Quote Link to comment Share on other sites More sharing options...
Phil21185 Posted September 21, 2017 Share Posted September 21, 2017 Hope it helps. Edit: interestingly my car reads 11.7 with just the ignition on and as I say, mine is very reluctant to use s/s if the air con is on. I used Ian's procedure successfully (the battery light flashed) and the dish still says 11.7v so will have to see Quote Link to comment Share on other sites More sharing options...
pcaouolte Posted September 21, 2017 Share Posted September 21, 2017 Mine hadn't worked for about 6 months until I went on holiday to Cornwall. Whilst there it started working and worked several times every day for two weeks. Now it doesn't work again. The smart charging system tries to keep the battery charged to 80%. The stop/start needs the battery to be above a certain charge level or it won't work. My battery usually shows 11.4v on the diagnostic display with the engine not running. My theory is that the hills in Cornwall allowed the regenerative charging system to charge the battery to more than 80% and that caused the stop/start system to work for a while. Now I am back in Lincolnshire and all journeys are on flat ground the battery has dropped back to 80% charge and stop/start no longer works. Quote Link to comment Share on other sites More sharing options...
Tommo17 Posted September 21, 2017 Author Share Posted September 21, 2017 Thanks. Will get a smart battery charger and reset the battery monitor and see if that helps. Not got any trips planned more than a few mile lol Quote Link to comment Share on other sites More sharing options...
Phil21185 Posted September 21, 2017 Share Posted September 21, 2017 The smart charging system is built into the car which is why you should never jump start it! Hmm I wonder what the voltage reads at the terminals then? Time to get my multimeter out. Lincolnshire shout out by the way! Quote Link to comment Share on other sites More sharing options...
alexp999 Posted September 21, 2017 Share Posted September 21, 2017 You can jump start these cars, but you just use the donor car as a booster battery, (i.e. not running). 1 Quote Link to comment Share on other sites More sharing options...
Guzzilazz Posted September 21, 2017 Share Posted September 21, 2017 When you turn the ignition on, all the car services are live, and you will be drawing a fair amount of current. You should test the battery with a multimeter across the battery terminals on the 20V scale. Anything below about 12.5 is starting to be cause for concern for a car that's been left overnight. When you start the car the starter motor give the battery a big hit with possibly 40-50 Amps drain., if your battery doesn't regularly show 12.7, it's on its way out. Modern batteries quite often will appear ok, until the morning you need to start the car urgently! Quote Link to comment Share on other sites More sharing options...
Tommo17 Posted September 21, 2017 Author Share Posted September 21, 2017 8 minutes ago, Guzzilazz said: When you turn the ignition on, all the car services are live, and you will be drawing a fair amount of current. You should test the battery with a multimeter across the battery terminals on the 20V scale. Anything below about 12.5 is starting to be cause for concern for a car that's been left overnight. When you start the car the starter motor give the battery a big hit with possibly 40-50 Amps drain., if your battery doesn't regularly show 12.7, it's on its way out. Modern batteries quite often will appear ok, until the morning you need to start the car urgently! Thanks for that. I'll get my meter out tonight and report back what it is at the terminals. Quote Link to comment Share on other sites More sharing options...
Phil21185 Posted September 21, 2017 Share Posted September 21, 2017 I'll do the same. Quote Link to comment Share on other sites More sharing options...
iantt Posted September 21, 2017 Share Posted September 21, 2017 The cluster test is way out on the voltages. Only check at the battery terminals Quote Link to comment Share on other sites More sharing options...
Tommo17 Posted September 23, 2017 Author Share Posted September 23, 2017 Thanks Ian been running about today in the car and after doing the reset it started working again. Happy days 2 Quote Link to comment Share on other sites More sharing options...
bananacat Posted September 25, 2017 Share Posted September 25, 2017 Working for me after months of not. Thanks Ian 1 Quote Link to comment Share on other sites More sharing options...
Pabz0804 Posted August 1, 2019 Share Posted August 1, 2019 Thanx for the procedure @iantt 👍🏼 this worked a treat for me. Stop/Start was intermittent and thought I was going mad 🤣 1 Quote Link to comment Share on other sites More sharing options...
SteEr1 Posted October 24, 2019 Share Posted October 24, 2019 Hi. Newbie here, on both the Forum and to my new car. Sorry to hijack this thread, but it is exactly the problem I am having. And I know I could just take it back to the garage under warranty, but I'd love to try any quick fixes before I make the journey. I have a 2018 40k km 1.5 diesel. I just bought it and only done a few journeys in it. With Auto Stop/Start on, and in the right conditions, I get the struck through A symbol on the dashboard, presumably when it would otherwise have functioned. I'd like to try the procedure to reset the BCS, but I am confused as the first instruction is to turn on the ignition? I have the passive key, so I just get in, foot on clutch and push the button, so how do I turn on the ignition, or is that code for "start the car"? Sorry, I've not had start/stop before now, its a whole new world! Ta! Quote Link to comment Share on other sites More sharing options...
JW1982 Posted October 24, 2019 Share Posted October 24, 2019 To turn on the ignition on a Keyless Start vehicle with manual transmission you have to push the start button without touching the clutch pedal. Quote Link to comment Share on other sites More sharing options...
SteEr1 Posted October 24, 2019 Share Posted October 24, 2019 Thank you! You can tell its a very new car to me can't you! Quote Link to comment Share on other sites More sharing options...
mjt Posted October 24, 2019 Share Posted October 24, 2019 It's hardly your fault. As far as I can see the Ford User manual doesn't tell you this. I only found out by accident when I forgot to press the clutch early on in the ownership of my car. Quote Link to comment Share on other sites More sharing options...
Dave 51 Posted November 27, 2019 Share Posted November 27, 2019 Hi, I have a 2019 Ford Focus, it's done 7000 miles & my stop/start has stopped working. I bought a smart charger & topped up the battery so it's now full but still no response from the stop/start other than the greyed out A with a line through it. Will the solution suggested on here work on my car? Many Thanks. Dave Quote Link to comment Share on other sites More sharing options...
Nemesis21 Posted January 6, 2020 Share Posted January 6, 2020 Hi to all I just want to thank you for the knowledge you share. I changed my battery at my Ford Focus MK3 turnier 1.6 Tdci and this procedure worked excellent, to reset the battery. In case you want to disable permanently the Start/Stop ( not from the button everytime I run the car ) is there any other procedure to do it? Quote Link to comment Share on other sites More sharing options...
Nemesis21 Posted January 6, 2020 Share Posted January 6, 2020 On 11/27/2019 at 6:13 PM, Dave 51 said: Hi, I have a 2019 Ford Focus, it's done 7000 miles & my stop/start has stopped working. I bought a smart charger & topped up the battery so it's now full but still no response from the stop/start other than the greyed out A with a line through it. Will the solution suggested on here work on my car? Many Thanks. Dave Dear Dave, I would recommend that you visit the nearest Ford dealer as the car is still new and under warranty. They can read the log and and the faults. There are certain circumstances that S/S works or doesn't work. Maybe a defective battery? Or too cold weather to make a S/S? Quote Link to comment Share on other sites More sharing options...
Gitfinger Posted January 6, 2020 Share Posted January 6, 2020 Mine seems to work every time I forget to press the override button.... 🙄 Quote Link to comment Share on other sites More sharing options...
TimJ Posted January 7, 2020 Share Posted January 7, 2020 Hi just buying my car this week, will it have stop start? Its a 2014/14 Focus Tit Nav Powershift 1.6 thanks Quote Link to comment Share on other sites More sharing options...
Cendun Posted January 9, 2020 Share Posted January 9, 2020 I have Ford focus 2016 1.5 My S/S stopped working. While driving, some warning lights turned on and off very shortly and return to normal. After this incident, I have a feeling that start and stop function stopped working. I would be grateful if you can help me figure out what may cause this problem. Many thanks in advance. Quote Link to comment Share on other sites More sharing options...
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