BMS reset required...
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FTE Leadership Emeritus
Joined: May 2014
Posts: 27,344
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From: Lake Hartwell, GA
BMS reset required...
I just found out last night that our 2016 Escape has a requirement for the BMS to be reset when a new battery is installed. About 10 months ago I installed a battery in the Escape and was not aware of this requirement.
Frankly, I think it is silly and too complicated, but I am not an engineer, not even and armchair engineer.
Anyway. I reset it this morning with the "manual" procedure which is ignition ON, flash high beams 5 times, press brake pedal 3 times, wait for battery light to flash 3 times. Apparently, this manual procedure does not work for all models or years and in those cased you need to use FORScan or the dealer to reset the BMS.
Frankly, I think it is silly and too complicated, but I am not an engineer, not even and armchair engineer.
Anyway. I reset it this morning with the "manual" procedure which is ignition ON, flash high beams 5 times, press brake pedal 3 times, wait for battery light to flash 3 times. Apparently, this manual procedure does not work for all models or years and in those cased you need to use FORScan or the dealer to reset the BMS.
Lead Driver
Joined: Jun 2005
Posts: 8,458
Likes: 722
From: Calgary Canada
it self-resets the state of charge when it sits overnight. However, the BMS has some kind of battery age clock that you have to reset with the procedure. Some people don't worry about that second reset. I don't know how important it is.
Logistics Pro
Joined: Jun 2009
Posts: 4,808
Likes: 83
From: Cedar Rapids, IA
I'm also unsure how important it is, especially if it has already been 10 months since the battery has been replaced. I suspect the system has already adjusted to the new battery.
Are you having an issue that you suspect could be related to not resetting the BMS, or just trying to be thorough now that you're aware of the BMS reset? If you're not encountering and issue, and didn't have any unexplained starting issues over the cold season, then it's probably not worth worrying about 10 months after the battery was installed.
But... if you're looking for an excuse to buy a highly capable scan tool, then by all means use this as your excuse.
-Rod
Are you having an issue that you suspect could be related to not resetting the BMS, or just trying to be thorough now that you're aware of the BMS reset? If you're not encountering and issue, and didn't have any unexplained starting issues over the cold season, then it's probably not worth worrying about 10 months after the battery was installed.
But... if you're looking for an excuse to buy a highly capable scan tool, then by all means use this as your excuse.
-Rod
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FTE Leadership Emeritus
Joined: May 2014
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From: Lake Hartwell, GA
Just being educated, informed and thorough when replacing a battery on these rolling computers.
I already have FORScanFvia laptop and Lite via Android. I also have a USB hardwire OBDII adapter and an OBDLink MX Bluetooth adapter, so no concerns there.
I simply want to be sure the Odyssey Performance AGM battery I installed is well cared for as the "rolling computer" is being utilized.
Now that I know, it is not a big deal, it was just a bit of a surprise.
I already have FORScanFvia laptop and Lite via Android. I also have a USB hardwire OBDII adapter and an OBDLink MX Bluetooth adapter, so no concerns there.
I simply want to be sure the Odyssey Performance AGM battery I installed is well cared for as the "rolling computer" is being utilized.
Now that I know, it is not a big deal, it was just a bit of a surprise.
Fleet Mechanic
Joined: Jan 2023
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The BMS limits the state of charge to 80% for fuel efficiency. SOC is calculated by when the vehicle sits for 8 hours. Battery age is used in the SOC calculation. To operate properly, BMS must be reset for a new battery. Also, the BCM needs to know the battery type and size. If AGM was OEM then nothing needs to change. Forscan can change battery type.
I spent many hours monitoring SOC and watching the charge routine when I went from standard lead acid to AGM battery. I finally determined BMS and battery type are too complicated and esoteric. I disabled BMS using Forscan and don't even worry about battery type. My battery lasts about 3-4 years and nothing I did seemed to improve that. Even now I have checked SOC occasionally and it never goes above 70%. 3 year old battey seems fine and will be replaced when it dies.
I spent many hours monitoring SOC and watching the charge routine when I went from standard lead acid to AGM battery. I finally determined BMS and battery type are too complicated and esoteric. I disabled BMS using Forscan and don't even worry about battery type. My battery lasts about 3-4 years and nothing I did seemed to improve that. Even now I have checked SOC occasionally and it never goes above 70%. 3 year old battey seems fine and will be replaced when it dies.
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