Ford 2011 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 276)

Note: Noise from the ABS pump motor may be observed during hill

descent control operation. This is a normal characteristic of the ABS and

should be no reason for concern.

Hill descent modes

• At speeds below 20 mph (32 km/h): When the HDC switch is pressed

and HDC is active, the HDC telltale will flash.

• At speeds below 20 mph (32 km/h): When the HDC switch is pressed

and conditions are not correct for hill descent activation, the HDC

system will be enabled, the light in the cluster will be on solid and

HILL DESCENT CONTROL READY will be displayed in the message

center.

• At speeds above 20 mph (32 km/h): When the HDC switch is pressed,

the HDC system will be enabled, the light in the cluster will not be

illuminated and FOR HILL CNTRL, 20 MPH OR LESS will be displayed

in the message center.

Refer to Message center in the Instrument Cluster chapter for hill

descent control messages.

STEERING

To help prevent damage to the power steering system:

• Never hold the steering wheel at its furthest turning points (until it

stops) for more than three to five seconds when the engine is running.

• Do not operate the vehicle with a low power steering pump fluid level

(below the MIN mark on the reservoir).

• Some noise is normal during operation. If excessive, check for low

power steering pump fluid level before seeking service by your dealer.

• Heavy or uneven efforts may be caused by low power steering fluid.

Check for low power steering pump fluid level before seeking service

by your dealer.

• Do not fill the power steering pump reservoir above the MAX mark on

the reservoir, as this may result in leaks from the reservoir.

If the power steering system breaks down (or if the engine is turned

off), you can steer the vehicle manually, but it takes more effort.

If the steering wanders or pulls, check for:

• an improperly inflated tire

• uneven tire wear

• loose or worn suspension components

Driving

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2011 F-250/350/450/550 (f23)

Owners Guide, 1st Printing

USA (fus)

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Ford 2011 F-550 v.1 Manuel d'utilisateur Page 276