OPERATING THE BRAKE SYSTEM
•
Improves vehicle control and
helps reduce stopping distances
in off-road conditions or on poor
traction surfaces such as loose
gravel, sand, and dirt.
• Allows retarders to function
independently of the ABS function.
• If your vehicle does not have an
engine retarder, the Off- Road
ABS switch will function the same.
CAUTION
Never drive your vehicle on improved
roads/highways with the Off-Road
ABS function turned on. When you
drive your vehicle onto an improved
road surface or highway, immediately
turn off the Off-Road ABS switch.
Failure to do so will cause the ABS
system to not function properly in an
ABS event under 25 mph and could
result in an accident or personal injury.
While the off-road mode can improve
vehicle control and shorten stopping
distances, some steering ability may
be reduced on certain surfaces result
-
ing from the momentarily sliding tires.
Always operate your vehicle at safe
operating speeds. Failure to do so
may cause you to lose control of the
vehicle and could result in an accident
or personal injury.
WARNING!
How the Off-Road ABS Function
Works
• The ABS lamp ashes slowly
during off-road mode engagement.
This is done to alert you of a
modication to the ABS control
software.
• At speeds above 25 mph, the ABS
controller operates in the normal
on-highway mode.
• At speeds between 10 and 25
mph, the ABS control software is
modied to allow short periods
(0.25 seconds) of
locked-wheel
cycles.
• At speeds below 10 mph, the ABS
control software is turned off to
allow locked wheels.
• When the Off-Road ABS function
is enabled, the Retarder Disable
output is turned off. That is,
the engine retarders are left to
function without ABS intervention.
For additional information, see the
Off-Road ABS pamphlet in your
vehicle’s glove box.
4
(04/13) Y53-6047–2C 4-31
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