Medium Duty Operator's Manual - Peterbilt Motors Company

USING THE BRAKE SYSTEM
NOTE: A “properly connected” ABS-equipped
trailer is
• a trailer with PLC hooked up to the J560 connector.
• a trailer without PLC that is hooked up to an
optional ISO 3731 connector.
NOTE: For doubles or triples: PLC does not distinguish
between trailers. An ABS problem in any
trailer will activate the trailer ABS warning lamp.
2. If an ABS-equipped trailer is properly connected, the
trailer ABS warning lamp will remain illuminated for a
few more seconds while the trailer ABS is tested.
• If no trailer ABS problems are detected, the
lamp will go off.
• If a trailer ABS problem is detected, the lamp
will remain on. The driver should have the
trailer’s ABS problem corrected before the vehicle
is driven with that trailer attached.
STARTING AND OPERATING THE VEHICLE
WARNING! Do not rely on an anti-lock brake
system that is functioning improperly. You
could lose control of the vehicle resulting in a
severe accident and serious personal injury. If
your ABS lamp goes on while you are driving
or stays on after the self-check, your anti-lock
system might not be working. The ABS may
not function in an emergency. You will still
have conventional brakes, but not anti-lock
brakes. If the lamp indicates a problem, have
the ABS checked.
Wheel Spin Control Warning Lamp
Your ABS may have an acceleration slip regulation (ASR)
or automatic traction control (ATC) feature. Either of these
features is monitored by a wheel spin control warning
lamp. This lamp is located in the warning lamp cluster.
The Wheel Spin Control warning lamp will briefly illuminate
and then go out when the ignition switch is first
turned on. The Wheel Spin Control warning lamp will illuminate
whenever the ASR or ATC system detects drive
wheel spin. The lamp will remain illuminated as long as
wheel spin is detected and the ASR or ATC system is
applying the drive wheel brakes or reducing engine
– 112 – Y53-6008A Medium Duty (R05/09)