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Maintenance6. Release the parking brake. With yourfoot on the brake pedal and with theair conditioning on, put your vehicle inD (Drive) and allow the engine to idlefor at least one minute.• If you do not allow the engine torelearn its idle trim, the idle qualityof your vehicle may be adverselyaffected until the idle trim iseventually relearned.7. Drive your vehicle to complete therelearning process• Your vehicle may need to be driven10 miles (16 kilometers) or more torelearn the idle and fuel trimstrategy along with the ethanolcontent for flexible fuel vehicles.• For flexible fuel vehicles, if you areoperating on E85, you mayexperience poor starts or aninability to start the engine anddriveability problems until the fueltrim and ethanol content have beenrelearned.If the battery has been disconnected or anew battery has been installed, the clockand radio settings must be reset once thebattery is reconnected.Always dispose of automotivebatteries in a responsible manner.Follow your local authorized standardsfor disposal. Call your local authorizedrecycling center to find out more aboutrecycling automotive batteries.Battery Management System (IfEquipped)The battery management system (BMS)monitors battery conditions and takesactions to extend battery life. If excessivebattery drain is detected, the system maytemporarily disable certain electricalfeatures to protect the battery. Thoseelectrical accessories affected include therear defrost, heated/cooled seats, climatecontrol fan, heated steering wheel, audioand navigation system. A message may beshown in the information displays to alertthe driver that battery protection actionsare active. These messages are only fornotification that an action is taking place,and not intended to indicate an electricalproblem or that the battery requiresreplacement.Electrical accessory installationTo ensure proper operation of the BatteryManagement System, any electricaldevices that are added to your vehicleshould not have their ground connectionmade directly at the negative battery post.A connection at the negative battery postcan cause inaccurate measurements ofthe battery condition and potentialincorrect system operation.Note: Electrical or electronic accessoriesadded to your vehicle by the dealer or theowner, may adversely affect batteryperformance and durability, and may affectthe performance of other electrical systemsin your vehicle.When a battery replacement is required,the battery should only be replaced witha Ford-recommended replacement batterythat matches the electrical requirementsof your vehicle. After battery replacement,or in some cases after charging the batterywith the external charger, the BatteryManagement System requires eight hoursof vehicle sleep time (key off with doorsclosed) to relearn the new battery state ofcharge. Prior to relearning the state ofcharge, the Battery Management Systemmay disable electrical features (to protectthe battery) earlier than normal.248F150 (TF6) , enUSA