2002 Ford Excursion Owner Guide 4th Printing - Page 166

Driving The RSS is automatically enabled OFF when the gear selector is placed in R (Reverse) and the ignition is ON. The RSS control allows the driver to disable the RSS only when the ignition is ON, and the gear selector is in R (Reverse). The OFF indicator remains illuminated when the system is disabled. The system defaults to ON every time R (Reverse) is selected. Press the control to disable or enable the system. The indicator will remain illuminated to indicate a failure of the RSS. Always keep the sensors (located on the rear bumper/fascia) free from dirt, snow and ice (do not clean the sensors with sharp objects). These elements may cause the system to operate inaccurately. If the vehicle sustains damage to the rear bumper/fascia, leaving it misaligned or bent, the sensing zone may be altered causing inaccurate measurement of obstacles or false alarms. FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED) For important information regarding safe operation of this type of vehicle, see Preparing to drive your vehicle in this chapter. When four-wheel drive (4WD) is engaged, power is supplied to all four wheels through a transfer case. 4WD can be selected when additional driving power is desired. 4WD operation is not recommended on dry pavement. Doing so could result in difficult disengagement of the transfer case, increased tire wear and decreased fuel economy. Electronic shift on the fly (ESOF) 4x4 system (if equipped) If equipped with the Electronic Shift 4WD System, and 4WD Low is selected while the vehicle is moving, the 4WD system will not engage. This is normal and should be no reason for concern. Before 4WD Low can be engaged, the vehicle must be brought to a complete stop, the brake pedal depressed and the transmission placed in N (Neutral). The 4WD system: • provides 4x4 High engagement and disengagement while the vehicle is moving. 166