Ford Expedition Owner's Manual page 331

WARNING: Keep batteries out of reach of children. Batteries
contain sulfuric acid. Avoid contact with skin, eyes or clothing.
Shield your eyes when working near the battery to protect against possible
splashing of acid solution. In case of acid contact with skin or eyes, flush
immediately with water for a minimum of 15 minutes and get prompt
medical attention. If acid is swallowed, call a physician immediately.
WARNING: Battery posts, terminals and related accessories
contain lead and lead compounds. Wash hands after handling.
To account for customer driving habits and conditions, your automatic
transmission electronically controls the shift quality by using an adaptive
learning strategy. The adaptive learning strategy is maintained by power
from the battery. When the battery is disconnected or a new battery is
installed, the transmission must relearn its adaptive strategy. Optimal
shifting will resume within a few hundred miles (kilometers) of operation.
If the shift quality does not improve within a few hundred miles
(kilometers) of operation, or if the downshifts and other throttle
conditions do not function normally or after a long deceleration
period, see your authorized dealer or a qualified service
technician as soon as possible.
Because your vehicle's engine is also electronically controlled by a
computer, some control conditions are maintained by power from the
battery. When the battery is disconnected or a new battery is installed,
the engine must relearn its idle and fuel trim strategy for optimum
driveability and performance. To begin this process:
1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift in P (Park), turn off all accessories and start the engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. With your foot on the brake pedal and with the A/C on, put the
vehicle in D (Drive) and allow the engine to idle for at least one minute.
7. Drive the vehicle to complete the relearning process.
• The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy.
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)
Maintenance and Specifications
331