Ford 2013 F-550 v.2 Manuel d'utilisateur télécharger pdf (Page 199)

If the service engine soon indicator remains on, have your vehicle serviced

at the first available opportunity. Although some malfunctions detected by

the OBD-II may not have symptoms that are apparent, continued driving

with the service engine soon indicator on can result in increased emissions,

lower fuel economy, reduced engine and transmission smoothness, and lead

to more costly repairs.

Readiness for Inspection/Maintenance (I/M) Testing

Some state, provincial and local governments may have

Inspection/Maintenance (I/M) programs to inspect the emission control

equipment on your vehicle. Failure to pass this inspection could prevent

you from getting a vehicle registration.

If the service engine soon indicator is on or the bulb does not

work, the vehicle may need to be serviced. See On-board

Diagnostics (OBD-II) in this chapter.

Your vehicle may not pass the I/M test if the service engine soon

indicator is on or not working properly (bulb is burned out), or if the

OBD-II system has determined that some of the emission control systems

have not been properly checked. In this case, the vehicle is considered

not ready for I/M testing.

If the vehicle’s engine or transmission has just been serviced, or the

battery has recently run down or been replaced, the OBD-II system may

indicate that the vehicle is not ready for I/M testing. To determine if the

vehicle is ready for I/M testing, turn the ignition key to the on position

for 15 seconds without cranking the engine. If the service engine soon

indicator blinks eight times, it means that the vehicle is not ready for I/M

testing; if the service engine soon indicator stays on solid, it means that

the vehicle is ready for I/M testing.

The OBD-II system is designed to check the emission control system

during normal driving. A complete check may take several days. If the

vehicle is not ready for I/M testing, the following driving cycle consisting

of mixed city and highway driving may be performed:

15 minutes of steady driving on an expressway or highway followed by

20 minutes of stop-and-go driving with at least four 30-second idle periods.

Allow the vehicle to sit for at least eight hours without starting the

engine. Then, start the engine and complete the above driving cycle.

The engine must warm up to its normal operating temperature. Once the

engine is started, do not turn off the engine until the above driving cycle

is complete. If the vehicle is still not ready for I/M testing, the above

driving cycle will have to be repeated.

198 Fuel and Refueling

2013 F-250/350/450/550 (f23)

Owners Guide gf, 2nd Printing, December 2012

USA (fus)

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Ford 2013 F-550 v.2 Manuel d'utilisateur Page 199

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