FORD 1998 Expedition - Manual (Page 169)

cleaning them, and apply a small
quantity of grease to the top of
each battery terminal to help
prevent corrosion.
If your battery has a
cover/shield, make sure it is
reinstalled after the battery is
replaced.
Because your vehicle’s engine is
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 conditions before your
vehicle will drive properly. To
begin this process:
1. Put the gearshift in P (Park),
turn off all accessories and start
the vehicle.
2. Let the engine idle for at least
one minute.
3. The relearning process will
automatically complete as you
drive the vehicle.
• If you do not allow the engine to
relearn its idle, the idle quality
of your vehicle may be adversely
affected until the idle is
eventually relearned.
• If the battery has been
disconnected or a new battery
has been installed, the clock and
the preset radio stations must
be reset once the battery is
reconnected.
Maintenance and care
169