Bendix Commercial Vehicle Systems EC-80 ABS ATC SD - Manual (Page 3)

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Bendix EC-80 ATC Controllers
Bendix EC‑80 ATC controllers support applications up to
six sensor/six modulator (6S/6M) installations with ATC and
drag torque control. They can support HSA functions. All
12 volt models support Power Line Carrier (PLC). 24 volt
models do not support PLC. See Chart 1 for more details.
BENDIX EC-80 CONTROLLERS WITH PLC
Since March 1, 2001, all towing vehicles must have an
in‑cab trailer ABS indicator lamp. Trailers transmit the
status of the trailer ABS over the power line (the blue wire
of the J560 connector) to the tractor using a PLC signal.
See Figures 4 and 5.
FIGURE 4 - POWER LINE WITHOUT PLC SIGNAL
FIGURE 5 - POWER LINE WITH PLC SIGNAL
Typically the signal is broadcast by the trailer ABS ECU.
The application of PLC technology for the heavy vehicle
industry is known as “PLC4Trucks.” The Bendix EC‑80
CHART 1 - BENDIX ® EC‑80 ™ CONTROLLERS AVAILABLE
ECU Mounting
Input
Voltage Sensors PMVs ATC
Blink
Codes
Serial
Commu‑
nication
PLC
ABS
Off-
Road
ATC
Off-
Road
Retarder
Relay
J1939
Bendix EC-80 ABS
controller
Cab 12 4 4 - - - -
Bendix EC-80 ABS
PLC controller
Cab 12 4 4 - - -
Bendix EC-80 ATC
controller
Cab 12 4/6 4/5/6
Bendix EC-80 ATC
controller
Cab 24 4/6 4/5/6 -
The Automatic Traction Control (ATC) function uses the
following additional components:
• Traction control valve (may be integral to the service
brake relay valve or a stand‑alone device)
• Dash‑mounted ATC status/indicator lamp
• J1939 serial communication to engine control module
• Stop lamp switch input (may be provided using the ECU
hardware input or J1939)
• Optional ATC off‑road switch
The Hill Start (HSA) function uses the following components:
• Traction Control Valve (TCV)
• Dash‑mounted HSA status/indicator lamp
• Dash‑mounted Enable/Disable switch
• RV‑3 Pressure Reducing Valve
• DC‑4 Double Check valve
ECU MOUNTING
Bendix ® EC‑80 ™ controllers are cab‑mounted. They are
not protected against moisture and must be mounted in
an environmentally protected location.
All wire harness connectors must be properly seated. The
use of secondary locks is strongly recommended.
All unused ECU connectors must be covered and
receive any necessary protection from moisture, etc.
ECUs utilize connectors from the AMP MCP 2.8 product
family.
HARDWARE CONFIGURATIONS
Bendix ® EC-80 ™ ABS Controllers
Bendix EC‑80 ABS controllers support four sensor/four
modulator (4S/4M) applications. Certain models support
Power Line Carrier (PLC) communications, with all models
supporting 12 volt installations. See Chart 1 for more
details.
GENERAL SAFETY GUIDELINES
WARNING! PLEASE READ AND
FOLLOW THESE INSTRUCTIONS
TO AVOID PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
guidelines should be observed AT ALL TIMES:
▲ Park the vehicle on a level surface, apply the parking
brakes and always block the wheels. Always wear
personal protection equipment.
▲ Stop the engine and remove the ignition key when
working under or around the vehicle. When working
in the engine compartment, the engine should be shut
off and the ignition key should be removed. Where
circumstances require that the engine be in operation,
EXTREME CAUTION should be used to prevent personal
injury resulting from contact with moving, rotating,
leaking, heated or electrically-charged components.
▲ Do not attempt to install, remove, disassemble or
assemble a component until you have read, and
thoroughly understand, the recommended procedures.
Use only the proper tools and observe all precautions
pertaining to use of those tools.
▲ If the work is being performed on the vehicle’s air brake
system, or any auxiliary pressurized air systems, make
certain to drain the air pressure from all reservoirs
before beginning ANY work on the vehicle. If the vehicle
is equipped with a Bendix ® AD-IS ® air dryer system, a
Bendix ® DRM ™ dryer reservoir module, or a Bendix ®
AD-9si ™ air dryer, be sure to drain the purge reservoir.
▲ Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle.
▲ Never exceed manufacturer’s recommended pressures.
▲ Never connect or disconnect a hose or line containing
pressure; it may whip. Never remove a component or
plug unless you are certain all system pressure has
been depleted.
▲ Use only genuine Bendix ® brand replacement parts,
components and kits. Replacement hardware, tubing,
hose, fi ttings, etc. must be of equivalent size, type
and strength as original equipment and be designed
specifi cally for such applications and systems.
▲ Components with stripped threads or damaged parts
should be replaced rather than repaired. Do not
attempt repairs requiring machining or welding unless
specifi cally stated and approved by the vehicle and
component manufacturer.
▲ Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
▲ For vehicles with Automatic Traction Control (ATC),
the ATC function must be disabled (ATC indicator
lamp should be ON) prior to performing any vehicle
maintenance where one or more wheels on a drive axle
are lifted off the ground and moving.
▲ The power MUST be temporarily disconnected
from the radar sensor whenever any tests USING A
DYNAMOMETER are conducted on a Bendix ® Wingman ®
Advanced ™ -equipped vehicle.
▲ You should consult the vehicle manufacturer's
operating and service manuals, and any related
literature, in conjunction with the Guidelines above.