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Old 10-30-2018, 12:54 PM   #51
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So I found a video of a Chinese guy that did this procedure. The confirmation that the BMS was reset is that the battery light will blink.
I did this procedure as I also found reference of it on an Ford focus forum from my country. On this forum they also state that you have to leave your car 8 hour or so parked.
This is the link to the video:

Last edited by ovidiur; 10-30-2018 at 01:07 PM.
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Old 10-30-2018, 03:27 PM   #52
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Quote:
Originally Posted by ovidiur View Post
So I found a video of a Chinese guy that did this procedure. The confirmation that the BMS was reset is that the battery light will blink.
I did this procedure as I also found reference of it on an Ford focus forum from my country. On this forum they also state that you have to leave your car 8 hour or so parked.
This is the link to the video:
https://youtu.be/QV9N0hvALyk
There was speculation that this procedure didn't work on NA cars. Has anyone in NA confirmed this works?
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Old 10-30-2018, 06:25 PM   #53
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Why not use FORScan?
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Old 10-31-2018, 01:54 AM   #54
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Although I already have an ELM 327 and use it to upgrade my display to 5" MFD Navi it was easier to press some buttons.
Hope this works also for NA Focus.
My problem started in summer when my battery died without a warning. Change the battery but did not know of this BMS reset procedure. Now in autumn I started to have Steering assistant fault message popping on the display and the steering assistant starts with delay. I notice that if I turn the key but do not start the engine and delay the start for more seconds then the steering start to operate also normally, no error message. So I suspected an electrical problem of not having enough power even if the engine did start.
On the Ford Focus Romanian forum someone suggested first to try this BMS reset before changing the complete steering rack.
So I tried it yesterday evening after parking the car in the garage.
This morning right after engine start the steering started without delay and the steering wheel could be turned without any effort, smooth.

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Old 11-17-2018, 02:57 AM   #55
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This might be the BMS reset procedure for cars without rear fogs. Found in an Amazon review of all places. If the link below dies someday, the “manual reset” instructions were loaded in an aftermarket reset scanner that gave instructions for cars with and without a rear fog light button.

https://www.amazon.com/gp/aw/review/...IV03Q?cursor=2

Quote:
Procedure

Note: Only reset the sensor if the battery was replaced.

Vehicles without rear fog light key:

Perform steps 1-3 within 10 seconds

1. Ignition ON, Engine OFF
2. Activate the headlight flasher 5 times.
3. Fully depress the brake pedal 3 times.

4. If the battery charge indicator lamp in the instrument cluster flashes 3 times in 15 seconds, then the reset was successful.
The procedure for cars WITH rear fogs is the same as Bud Bundy posted earlier, except Bud had an added a step after #1 saying the dipped beams need to be on. So maybe that needs to be in there?

Last edited by E365/5; 11-17-2018 at 03:23 AM.
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Old 11-17-2018, 03:00 AM   #56
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Anyone want to test it out and report back? I would, but aren’t doing a battery right now.

Even better, can FORscan people confirm it’s actually resetting the BMS?

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Old 11-17-2018, 10:30 AM   #57
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Quote:
Originally Posted by E365/5 View Post
Anyone want to test it out and report back? I would, but arenít doing a battery right now.

Even better, can FORscan people confirm itís actually resetting the BMS?
FORscan dose reset it. that method you quoted dont work on the usa cars. but for scan diffidently resets it, it will throw a bunch of fauls positive codes in the processes just clear them and you will be good to go

maby i will make a vid of it next time i have to do it.
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Old 01-28-2019, 04:37 PM   #58
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My Focus is coming due for a battery can I just replace the battery and call it good. I spoke with 2 different dealerships in my area and they told me That the BMS will reset itself and they never heard of it needing to be reset.
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Old 01-28-2019, 04:43 PM   #59
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My Focus is coming due for a battery can I just replace the battery and call it good. I spoke with 2 different dealerships in my area and they told me That the BMS will reset itself and they never heard of it needing to be reset.

they will say that but the truth is it wont reset it self you will know it if the 1 hr mode on the radio dont stay on for a full hr. and it may keep throwing the low battery msg at you. they clame they dont know about it and they may not. but trust the ones hear that have these cars you need to manually reset the bms after every change. simple and fast to do. even tells this in the service manual some ware
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Old 01-28-2019, 05:02 PM   #60
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Originally Posted by spots View Post
they will say that but the truth is it wont reset it self you will know it if the 1 hr mode on the radio dont stay on for a full hr. and it may keep throwing the low battery msg at you. they clame they dont know about it and they may not. but trust the ones hear that have these cars you need to manually reset the bms after every change. simple and fast to do. even tells this in the service manual some ware


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