PART 7: STARTING & OPERATING THE VEHICLE ANTI-LOCK BRAKING SYSTEM OPERATING INFORMATION
(05/10) Y53-6032 – 115 –
WARNING! Exercise extreme care when tow-
ing doubles or triples with a vehicle equipped
with Electronic Stability Program. Excessive
speed and aggressive maneuvers, such as
sharp turns, sudden steering inputs or abrupt
lane changes should be avoided because
these maneuvers could cause loss of vehicle
control possibly resulting death or severe per-
sonal injury.
Limitations Of Stability Systems
The ESP stability system’s effectiveness may be greatly
reduced if:
• The load shifts due to improper retention, accident
damage or the inherently mobile nature of some loads
(for example, hanging meat, live animals or partially
laden tankers),
• The vehicle has an unusually high or off-set center of
gravity (CG),
• One side of the vehicle drops off the pavement at an
angle that is too large to be counteracted by a reduc-
tion in speed,
• The vehicle is used to haul double or triple trailer com-
binations,
• If very rapidly winding steering inputs are inputted at
high speeds,
• There are mechanical problems with suspension lev-
eling of the tractor or trailer resulting in uneven loads,
• The vehicle is maneuvering on a high banked road
creating either additional side forces due to the weight
(mass) of the vehicle or a deviation between expected
& actual yaw rates,
• Gusty winds are strong enough to cause significant
side forces on the vehicle and any towed vehicles.
To Maximize The Effectiveness Of ESP:
• Loads must be properly secured and evenly distrib-
uted at all times.
• Drivers need to exercise extreme caution at all times,
and avoid sharp turns, sudden steering inputs or
abrupt lane changes at high speeds, particularly if:
– the vehicle hauls loads that could shift,
– the vehicle or load has a high or off-set center of
gravity (CG) when loaded, or
– the vehicle tows doubles or triples.
Y53-6032.book Page 115 Monday, May 24, 2010 3:37 PM
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