A friendly PSA as I didn't see an on-point thread on this recently, and with the cold currently gripping North America, a timely topic.
In Gen 6.5 Taurus vehicles (along with PI variants), the Body Control Module contains parameters that work together with the PCM
to optimize system charging and battery lifespan. This system, the Battery Management System, must be reset with the changing of your battery.
Battery Management System reset can be completed in 2 ways:
* Using Ford IDS
* Using FORScan (freeware) with an OBD-II device that can reach HS CAN. Extended license (free) is required to access the Service Procedure tied to the BCM
Resetting the system will allow the vehicle to re-learn the state of charge/discharge via the Hall effect sensor, and reset an age parameter in the BCM
If you cannot get the system reset, after replacement, leave the vehicle undisturbed for 8 hours. This includes pressing any remote fobs, opening any doors, etc. The state of charge parameter will recalibrate during this period. Note that the age parameter will NOT
be reset with this method, and thus the charging strategy will be inefficient as it will be calibrating charging efforts consistent with an aged battery.
In my experience, even most Ford dealers will neglect to reset the BCM--be sure to ask even if you're having the battery swapped at a Ford-authorized service location, such as Quick Lane or otherwise.
Any questions, please shout out. This notice does NOT apply to 2010-2012 vehicles.