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 and fuel trim strategy for
optimum driveability and performance.
Flexible fuel vehicles (FFV) must also relearn
the ethanol content of the fuel for optimum
driveability and performance.
To restore the settings, do the following:
1. Apply the parking brake.
2. Shift into park (P) or neutral (N).
3. Switch off all accessories.
4. Press the brake pedal and start your vehicle.
5. Run the engine until it reaches normal operating temperature. While the engine
is warming up, complete the following:
Reset the clock. See Audio System
(page 313). Reset the power windows
bounce-back feature. See Windows and
Mirrors
(page 78). Reset the radio
station presets. See Audio System
(page 313).
6. Allow the engine to idle for at least one minute. 7.
Drive the vehicle at least 10 mi (16 km) to
completely relearn the idle trim and fuel
trim strategy.
Note: If you do not allow the engine to relearn
the idle and fuel trim strategy, the idle quality
of your vehicle may be adversely affected until
the engine computer eventually relearns the
idle trim and fuel trim strategy.
Note: For flexible fuel vehicles, if you are
operating on E85, you may experience poor
starts or an inability to start the engine and
driveability problems until the fuel trim and
ethanol content have been relearned.
Make sure that you dispose of old batteries
in an environmentally friendly way. Seek
advice from your local authority about
recycling old batteries.
If storing your vehicle for more than 30 days
without recharging the battery, we
recommend that you disconnect the battery
cables to maintain battery charge for quick
starting. Battery Management System
(If
Equipped)
The battery management system monitors
battery conditions and takes actions to
extend battery life. If excessive battery drain
is detected, the system temporarily disables
some electrical systems to protect the
battery.
Systems included are:
• Heated rear window.
• Heated seats.
• Climate control.
• Heated steering wheel.
• Audio unit.
• Navigation system.
A message may appear in the information
displays to alert you that battery protection
actions are active. These messages are only
for notification that an action is taking place,
and not intended to indicate an electrical
problem or that the battery requires
replacement.
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