DaveG1975 Posted April 29, 2021 Share Posted April 29, 2021 Can anyone tell me how you reset bms on a 2019 auto focus Quote Link to comment Share on other sites More sharing options...
VFR800 Posted April 29, 2021 Share Posted April 29, 2021 My MK4 Focus (2019) Manual Neutral Ignition on - press start/stop button lights in auto flash main beam 5 times press brake pedal 3 times battery light on dash should blink 3 times within the next 15 seconds. I had to try mine a few times before the battery light blinked 3 times. Quote Link to comment Share on other sites More sharing options...
DaveG1975 Posted May 3, 2021 Author Share Posted May 3, 2021 I managed to reset the bms and been out for a good drive but the auto start still hasn’t kicked in and ideas Quote Link to comment Share on other sites More sharing options...
YOG Posted May 3, 2021 Share Posted May 3, 2021 Did you fully charge the battery, using a charger, before doing the reset? Quote Link to comment Share on other sites More sharing options...
DaveG1975 Posted May 4, 2021 Author Share Posted May 4, 2021 No i didn’t I’ve had about an hour and half drive in it before I reset it Quote Link to comment Share on other sites More sharing options...
pcaouolte Posted May 4, 2021 Share Posted May 4, 2021 When you drive the car the smart charge is aiming to charge the battery to 80% not 100%. The BMS resets itself when the car is left idle overnight by checking the battery voltage, it only requires a manual reset when a new battery is fitted. Charging the battery to 100% with a smart charger might get the stop-start working again for a few days. Quote Link to comment Share on other sites More sharing options...
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