Ford 2015 F-550 v.2 Manuel d'utilisateur télécharger pdf (Page 147)

On-Board Diagnostics (OBD-II)

Your vehicle is equipped with an on-board

diagnostics system (OBD-II) that monitors

the engine’ s emission control system. This

system protects the environment by

ensuring that your vehicle continues to

meet government emission standards. The

OBD-II system also assists your authorized

dealer in properly servicing your vehicle.

When the service engine soon

indicator illuminates, the OBD-II

system has detected a

malfunction. Temporary malfunctions may

cause the service engine soon indicator to

illuminate.

Examples of temporary malfunctions are:

• the vehicle has run out of fuel—the

engine may misfire or run poorly

• poor fuel quality or water in the

fuel—the engine may misfire or run

poorly

• the fuel fill inlet may not have been

properly closed See Refueling (page

140).

• driving through deep water—the

electrical system may be wet.

You can correct these temporary

malfunctions by filling the fuel tank with

good quality fuel, properly closing the fuel

fill inlet or letting the electrical system dry

out. After three driving cycles without these

or any other temporary malfunctions

present, the service engine soon indicator

should stay off the next time you start the

engine. A driving cycle consists of a cold

engine startup followed by mixed

city/highway driving. No additional vehicle

service is required.

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, you may need to have

the vehicle serviced. See On-Board

Diagnostics (OBD-II).

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, your vehicle is 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

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Fuel and Refueling

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