Roll Stability Advisor and
Control System
The roll stability system may include only the roll sta-
bility advisor (RSA) only, or it may also include the
roll stability control (RSC).
A decal (
Fig. 2.28
) on the auxiliary dash panel, and
an amber-colored dash indicator light (
Fig. 2.29
), in-
dicate that the vehicle is equipped with roll stability
system components.
Roll Stability Advisor
IMPORTANT: This is not an advance warning
system. The roll stability advisor displays a mes-
sage only after the driving maneuver is com-
pleted.
The roll stability system uses a lateral-acceleration
sensor that monitors rollover risk. Shortly after a
curve, lane change, or other driving maneuver that
results in a rollover-risk detection, a dash warning
light illuminates, an audible tone sounds, and a driver
advisory message is displayed in the driver message
center. The purpose is to advise the driver that the
previous maneuver produced a rollover risk.
The roll stability advisor displays different text mes-
sages depending on the severity of the risk of each
occurrence of risky driving. From the highest risk
level to the lowest risk level, the system will sound
an audible alert, and display a message, as shown in
Fig. 2.30
.
NOTE: The system will calculate and recom-
mend a speed reduction value. It may be differ-
ent than the values shown here.
Bring the vehicle to an authorized service facility if a
system failure message is displayed.
Roll Stability Control
WARNING
The Roll Stability Control system is intended only
as an aid for a conscientious and alert driver.
Carefully read the information in this manual to
understand this system and its limitations. The
Roll Stability Control system is not a substitute
for safe driving procedures. Failure to drive
safely, and use the system properly, could result
in personal injury and/or death and property
damage.
The roll stability control system automatically reduces
engine power, applies the engine brake, and/or ap-
plies the tractor and trailer brakes when the accelera-
tion sensor detects that the vehicle is at risk of rolling
over. The control can intervene even before an advi-
sory message is displayed.
The dash indicator light illuminates whenever the roll
stability control system intervenes.
Hard-Braking Advisor
The hard-braking advisor uses the information from
the ABS wheel speed sensors to determine when
braking is severe enough to produce lockup at one
or more wheels on the tractor, and/or very rapid ve-
hicle deceleration. Shortly after a hard-braking event
occurs, an advisory message is displayed in the
driver message center, indicating that the braking
behavior was too aggressive for the current road sur-
face conditions. This system is not a replacement for
a driver’s good judgment. Sometimes it is necessary
to brake hard.
lamp indicates traction
OR roll control event.
Follow instructions in
driver’s manual.
24−01204−000
07/11/2003
f080125
SAFETY INSTRUCTIONS
Fig. 2.28, Roll Stability Decal
06/26/2003
f602128
Fig. 2.29, Roll Stability Indicator Lamp
Instruments and Controls Identification
2.26
