operators_manual

NOTE
Tractors/Trucks and trailers built after
03/01/2001
must be able to turn on an
In-Cab Trailer ABS Warning Light (per
U.S. FMVSS121). The industry chose
Power Line Communication (PLC) as
the standard method to turn it on. On
trailers built prior to 03/01/2001 verify
trailer ABS system status via the re-
quired external warning light mounted
on the trailer. The indicator light on the
trailer should be yellow and identified
with the letters ABS.
ABS system, which may affect its
operation.
CAUTION
The center pin of the 7-way trailer light
line
may be constantly powered for
ABS. Make sure it will not accidentally
turn on trailer equipment.
Special Trailer ABS Without PLC
(Option)
If a trailer does not have PLC, but it does
have ABS that is powered through an
optional second trailer connector (ISO
3731) and that trailer ABS is designed to
control the Trailer ABS Warning Lamp in
the cab and the vehicle has been ordered
with the option to turn on this lamp for
these types of trailers, then this lamp will
turn on when that trailer ABS has a system
problem. This should be checked by a
dealer as soon as possible. The Trailer
ABS Warning Lamp will not turn on for the
power-on test when connected to these
types of trailers.
NOTE
Very few trailers built before
03/01/2001
have this option. Trailers
built after 03/01/2001 are built with
PLC technology.
Advanced ABS with Stability
Control
Advanced ABS with Stability Control is a
feature that reduces the risk of rollovers
and other loss of control situations. For
vehicles towing trailers, the feature can
reduce the risk of a trailer jackknifing.
During operation, the system constantly
compares performance models to the
vehicle’
s actual movement, using the
wheel speed sensors of the ABS system,
as well as lateral, yaw, and steering angle
sensors. If the vehicle shows a tendency to
leave an appropriate travel path, or if
critical threshold values are approached,
the system will intervene to assist the
driver.
DRIVING - Brakes
For doubles or triples, the lamp does not
distinguish between trailers. An ABS
problem in any of the trailers will activate
the Trailer ABS Warning Lamp.
If you change the intended service in any
way (e.g., number of axles, multiple
trailers, add switchable trailer accessories,
etc.) from the date the vehicle was
manufactured, you should contact your
trailer manufacturer and/or trailer antilock
brake manufacturer to determine if the
power available at the 7-way trailer light
line is adequate. Failure to do so might
result in insufficient power to the trailer
Y53-6110-1A1 (01/21)
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