Ford Fiesta 2019 Owner's Manual page 196

WARNING: This vehicle may have
more than one battery. Removing the
battery cables from only one battery
does not disconnect your vehicle
electrical system. Make sure you
disconnect the battery cables from all
batteries when disconnecting power.
Failure to do so may cause serious
personal injury or property damage.
WARNING: For vehicles with
Auto-Start-Stop the battery requirement
is different. You must replace the battery
with one of exactly the same
specification.
The battery is located in the engine
compartment. See Under Hood
Overview (page 183).
Your vehicle has a maintenance-free
battery. It does not require additional
water during service.
If your vehicle battery has a cover, make
sure you correctly install it after cleaning
or replacing the battery.
For longer, trouble-free operation, keep the
top of the battery clean and dry and the
battery cables tightly fastened to the
battery terminals. If any corrosion is
present on the battery or terminals, remove
the cables from the terminals and clean
with a wire brush. You can neutralize the
acid with a solution of baking soda and
water.
We recommend that you disconnect the
negative battery cable terminal from the
battery if you plan to store your vehicle for
an extended period.
2019 Fiesta (CCT) Canada/United States of America, KE8J 19A321 AA enUSA, Edition date: 201806, Second-Printing
Maintenance
To maintain correct operation of the
battery management system, if you add
any electrical devices to your vehicle, do
not connect the ground connection directly
to the negative battery terminal. A
connection at the negative battery terminal
can cause inaccurate measurements of
the battery condition and potential
incorrect system operation.
Note: Electrical accessories or components
added to your vehicle by you or an
authorized dealer, may adversely affect
battery performance, durability and the
performance of other electrical systems on
your vehicle.
If a replacement battery is required, we
recommend you use a Ford replacement
battery that matches the electrical
requirements of your vehicle.
If you disconnect or replace the battery
and your vehicle has an automatic
transmission, transmission must relearn
its adaptive strategy. Because of this, the
transmission may shift firmly when first
driven. This is normal operation while the
transmission fully updates its operation to
optimum shift feel.
Remove and Reinstall the Battery
To disconnect or remove the battery, do
the following:
1. Apply the parking brake and switch the
ignition off.
2. Switch all electrical equipment off, for
example lights and radio.
3. Wait a minimum of two minutes before
disconnecting the battery.
Note: The engine management system has
a power hold function and remains powered
for a period after you switch the ignition off.
This is to allow diagnostic and adaptive
tables to be stored. Disconnecting the
battery without waiting can cause damage
not covered by the vehicle Warranty.
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