TourGuide Posted March 8 Report Share Posted March 8 (edited) This is a fairly simple process and important for various reasons. No scan tool or calibration needed that I can see. 1. With the vehicle in accessory power mode - flash high beams 5 times in a row. 2. Tap the brakes 3 times. 3. Done. Source: Youtube video link. Of course - the dealership would also be happy to invite you for a visit and pay them a small fee to hook up their scan tool and perform the reset - but your choice is your choice. Have a great day! Further in the replies to this thread - the venerable Haz chimed in with more detail about BMS. This quickie reset applies to vehicles that will have the battery replaced with a new unit. After this thread mostly played out - I went out and purchased a bidirectional scan tool - so I have another method to perform this reset among other functions. Cheers all - and cheers to Haz! Edited March 10 by TourGuide 2 Quote Link to comment Share on other sites More sharing options...
Over Edge Posted March 8 Report Share Posted March 8 What does the BMS reset do or why are you doing it ? Quote Link to comment Share on other sites More sharing options...
TourGuide Posted March 8 Author Report Share Posted March 8 The battery monitoring system keeps track of the battery voltage and to my understanding - regulates the amount of power going to the vehicle systems. I'm replacing my battery and so instead of the old and bad battery - I'll have a new one with full voltage capability - and this all my subsystems can operate at peak capabilities - instead of operating at a reduced performance spec to keep things running. Quote Link to comment Share on other sites More sharing options...
TourGuide Posted March 8 Author Report Share Posted March 8 (edited) I will add that the service procedure recommendeds that you hook up the scan tool (which I don't have a Ford scan tool) to perform the reset. I would hazard a guess that techs at the dealership are using this instead of wading through 16 menus to get the function punched in on the scanner. Then you get charged.5 or an hour or so of labor for about a 15 second procedure. That is about $250.00 for an hour around my local dealership. Edited March 8 by TourGuide Quote Link to comment Share on other sites More sharing options...
dabangsta Posted March 8 Report Share Posted March 8 I haven't yet replaced the battery in my 2019 Edge, but when I did in my 2017 Escape (that I let the battery get down to 225 CCA and auto start/stop was disabled, and I couldn't sit and listen to the radio) those steps worked (auto start/stop was still disabled until I did it), but they didn't for my 2015 Fusion. I don't think the alternate method (that seems to be UK related due to the nomenclature for options) did either. I am pretty sure I finally used Forscan to do it. Quote Link to comment Share on other sites More sharing options...
TourGuide Posted March 9 Author Report Share Posted March 9 Interesting - it makes me wonder if your 15 fusion didn't have the bms system on it. I have followed the person who is shown in this source video in the past. He does know his mechanic stuff - so 🤷♂️ Quote Link to comment Share on other sites More sharing options...
Haz Posted March 9 Report Share Posted March 9 (edited) The Fusion and Edge Workshop Manual sections on vehicle Charging System are identical, including the Battery Monitoring System reset procedure... Battery Replacement If the vehicle battery is replaced, it is very important to perform the battery monitoring system reset using the scan tool. If the battery monitoring system reset is not carried out, it holds the old battery parameters and time in service counter in memory. Additionally it tells the system the battery is in an aged state and the may limit the Electrical Energy Management system functions. Additional detail is offered in this statement... This reset is reserved only for new battery installation. This reset will clear the learned battery data, the battery time in service, and will affect the aging algorithm parameters, which have been learned since the installation of the battery. Document download links> Charging System - 2.0L EcoBoost - System Operation and Component Description - Edge Workshop Manual.pdf Charging System - 2.7L EcoBoost - System Operation and Component Description - Edge Workshop Manual.pdf Battery Load Shed - Description and Operation - Edge Workshop Manual.pdf Good luck! Edited March 9 by Haz 6 Quote Link to comment Share on other sites More sharing options...
TourGuide Posted March 10 Author Report Share Posted March 10 Thanks a ton Haz. Appreciate what you do here for us! 1 Quote Link to comment Share on other sites More sharing options...
David Brent Grider Posted April 18 Report Share Posted April 18 On 3/8/2024 at 7:10 AM, TourGuide said: This is a fairly simple process and important for various reasons. No scan tool or calibration needed that I can see. 1. With the vehicle in accessory power mode - flash high beams 5 times in a row. 2. Tap the brakes 3 times. 3. Done. Source: Youtube video link. Of course - the dealership would also be happy to invite you for a visit and pay them a small fee to hook up their scan tool and perform the reset - but your choice is your choice. Have a great day! Further in the replies to this thread - the venerable Haz chimed in with more detail about BMS. This quickie reset applies to vehicles that will have the battery replaced with a new unit. After this thread mostly played out - I went out and purchased a bidirectional scan tool - so I have another method to perform this reset among other functions. Cheers all - and cheers to Haz! Sorry if this is not the appropriate forum for my situation, but it's the closest I can find. I have a 2019 Lincoln Nautilus Reserve, 6-cylinder. I had the battery disconnected while the front fog lighting was replaced due to an accident. When the vehicle was repaired and the battery was connected I got this BMS fault. I followed the procedure, as described here, and got the results that were expected for a BMS reset. The battery fault light on the dash blinked 3 times indicating a reset. When I tried to drive the vehicle I got a hard bump when shifting into drive which indicated to me that things weren't right. I have parked the vehicle and I am charging the battery. It has now sat for the 8 hours that I have read is needed for a reset. Can you advise me what I should do now? Quote Link to comment Share on other sites More sharing options...
Haz Posted April 18 Report Share Posted April 18 (edited) Welcome to the Forum, @David Brent Grider! Your concern is especially reasonable if this harsh transmission engagement symptom has not previously occurred in your Nautilus. However, the symptom is likely due to the extended period of time your Nautilus' battery was disconnected during the fog light repair. Battery disconnection can affect the Transmission Adaptive Table values that your Nautilus's electronic modules utilize for the transmission's electronic controls. Below is a procedure from the 2019 Nautilus Workshop Manual which you can employ toward likely restoring your Nautilus' transmission engagement and shift point performance. If you are not comfortable with any portion of the procedure(s), you may consider taking your Nautilus to the dealership, where the Service Technician will likely perform the same procedure(s). Be mindful of your choice of roadway and observant of your surroundings when performing the described acceleration and braking routines, in order to ensure the safety of yourself and others in the vicinity... Adaptive Learning Drive Cycle Configuration NOTE: The engine and transmission must be at normal operating temperature. Using the scan tool, clear the DTC and Transmission Adaptive Tables. Bring the transmission to normal operating temperature. With the engine running and the brake applied, select the gears in the following order, pausing in each gear for 4 seconds: N, R, N, D, R, D, N. Repeat this pattern 2 times. If any engagements feel soft or harsh, repeat this procedure. Drive the vehicle and accelerate at a moderate throttle so that the upshifts occur at 2,000 rpm up to 100 km/h (60 mph) and brake moderately to a stop. Repeat this pattern 2 times. Drive the vehicle and accelerate at a moderate throttle so the upshifts occur at 3,000 rpm up to 100 km/h (60 mph) and brake moderately to a stop. Repeat this pattern 2 times. With the engine running and the brake applied, select the gears in the following order, pausing in each gear for 4 seconds: N, R, N, D, R, D, N. Repeat this pattern 2 times. In all likelihood, based upon the repair history you describe, the above procedure may eliminate the harsh engagement symptom. If it does not correct the issue, you could try performing this next procedure, also from the 2019 Nautilus Workshop Manual, to perhaps set Diagnostic Trouble Code(s) that may help identify conditions contributing to the symptom(s). Once again, if you are not comfortable with any portion of the procedure(s), you may consider taking your Nautilus to the dealership, where the Service Technician will likely perform the same procedure(s). Road Testing Vehicle Shift Point Road Test NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. Upshift Gear Sequence At times the 8-speed transmission may skip gears when the vehicle starts from a complete stop. This is normal and desired behavior. At part pedal when acceleration is brisk, single step upshifts would result in very frequent shift events (very short time in gear). Double step upshifts results when a longer time is spent in gear. However, at light pedal or road load, single step upshifts will occur. The small 8-speed gear steps allow the engine speed to drop to lower values than it would in the 6-speed transmission; providing for the best fuel economy. In contrast, when the 8-speed transmission is at heavy or max pedal, the small steps keep the engine closer to the horsepower peak for best performance. Downshift Gear Sequence At times the 8-speed transmission may skip gears when the vehicle downshifts to a complete stop. This is normal and desired behavior. The same skip shift strategy that is used for the upshift may be applied during downshift. Most performance based automatic transmission DTC s require the fault to be detected consecutively multiple times (up to 5 times) before setting a DTC . Performing the shift point road test as detailed below increases the likelihood that a DTC sets if a fault is present in the system. Shift Point Road Test Bring the engine and transmission up to normal operating temperature. Operate the vehicle with the selector lever in the D position. From a stop, accelerate the vehicle to 80 km/h (50 mph) with the shifts occurring at approximately 2,000 rpm. Stay in 8th gear for 30 seconds or until the TCC applies. Repeat this two times. From a stop, accelerate the vehicle to 80 km/h (50 mph) with the shifts occurring at approximately 3,000 rpm. Stay in 8th gear for 30 seconds or until the TCC applies. Repeat this two times. If the transmission fails to upshift/downshift, REFER to: Diagnosis By Symptom (307-01B Automatic Transmission - 8-Speed Automatic Transmission – 8F57, Diagnosis and Testing). Shift Speed Chart Shift Speed 1-2 6 mph (10 km/h) 2-3 9 mph (14 km/h) 1-3 10 mph (16 km/h) 3-4 16 mph (26 km/h) 4-5 22 mph (35 km/h) 5-6 29 mph (47 km/h) 6-7 37 mph (60 km/h) 7-8 45 mph (72 km/h) Attached below are PDF versions of both these Workshop Manual procedure, for you to print and/or save for future reference. Good luck! Adaptive Learning Drive Cycle - General Procedures - 8F57 Automatic Transmission - 2019 Nautilus Workshop Manual.pdf Road Testing Vehicle - Diagnosis and Testing - 8F57 Automatic Transmission - 2019 Nautilus Workshop Manual.pdf Edited April 18 by Haz 3 2 Quote Link to comment Share on other sites More sharing options...
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