FORD 2012 F-250 - Manual (Page 379)

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. 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. 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.
• If you do not allow the engine to relearn its idle trim, the idle
quality of your vehicle may be adversely affected until the idle
trim is eventually relearned.
If the battery has been disconnected or a new battery has been installed,
the clock and radio settings must be reset once the battery is reconnected.
• Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
ENGINE COOLANT
Checking the engine coolant
Note: If your vehicle is equipped with a diesel engine, refer to the
Maintenance and Specifications section of your Diesel Supplement.
Check the concentration and level of the engine coolant at the intervals
listed in the Scheduled Maintenance Information.
The coolant concentration should be maintained at 50%.
L
E
A
D
RETURN
RECYCLE
Maintenance and Specifications
379
2012 F-250/350/450/550 (f23)
Owners Guide, 4th Printing
USA (fus)