Roll Stability Control; Hard-Braking Advisor - freightliner Columbia Driver Manual

Instruments and Controls Identification
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-
2.29
MSG Message Message to Display
No.
1 System Fault
RAC SYSTEM FAIL
2 RSC
ACTIVE SLOWING
ROLLOVER RISK
3 RSA Level 3
VERY HIGH RISK OF
ROLLOVER DETECTED
REDUCE SPEED
AT LEAST 7 MPH
REDUCE SPEED
AT LEAST 11 KPH
4 RSA Level 2
HIGH RISK OF
ROLLOVER DETECTED
REDUCE SPEED
AT LEAST 7 MPH
REDUCE SPEED
AT LEAST 11 KPH
5 RSA Level 1
ROLLOVER RISK
REDUCE SPEED
AT LEAST 7 MPH
REDUCE SPEED
AT LEAST 11 KPH
6 HBED Level 3
HARD BRAKING WITH
ABS ACTIVATED
BRAKE SOONER
7 HBED Level 2
HARD BRAKING
BRAKE SOONER
8 HBED Level 1
LOSS OF TRACTION
ABS ACTIVATED
ROAD SURFACE
07/25/2008
Fig. 2.30, Roll Stability and Hard-Braking Warnings
face conditions. This system is not a replacement for
a driver's good judgment. Sometimes it is necessary
to brake hard.
Display
Time:
Seconds
4
WARNING
4
19.6
or in metric
14
or in metric
8.4
DETECTED
or in metric
14
LOOK AHEAD
14
DETECTED
LOOK AHEAD
14
MAY BE POOR
f040769
Buzzer
Time:
Seconds
1
None
10
5
2
0.5
0.5
0.5