Bendix Commercial Vehicle Systems EC-80 ABS ATC SD - Manual (Page 2)

2
between the transmission and braking system to help the
driver prevent the vehicle from rolling backwards when
moving forward from a stationary position on steep inclines.
Bendix
® EC‑80 ™ ATC controllers have a drag torque
control feature which reduces driven‑axle wheel slip (due
to driveline inertia) by communicating with the engine’s
controller and increasing the engine torque.
COMPONENTS/ECU MOUNTING
The Bendix EC‑80 controller’s ABS function uses:
• Bendix ® WS‑24 ™ wheel speed sensors (4 or 6,
depending on ECU and configuration). Each sensor is
installed with a Bendix ® Sensor Clamping Sleeve
• Bendix ® M‑32 ™ / M‑32QR ™ / M‑40X ™ Pressure
Modulator Valves (4, 5, or 6 depending on ECU and
configuration)
• Dash‑mounted tractor ABS indicator lamp
• Service brake relay valve
• Dash‑mounted trailer ABS indicator lamp (used on all
towing vehicles manufactured after March 1, 2001)
• Optional blink code activation switch
• Optional ABS off‑road switch. (Off‑road feature is not
available on all ECUs ‑ See Chart 1.)
90° Speed
Sensors
Straight Speed
Sensors
Sensor
Clamping
Sleeve
FIGURE 2 - BENDIX ® WS‑24 ™ WHEEL SPEED SENSORS
Delivery
(Port 2)
Supply
(Port 1)
Exhaust (Port 3)
Electrical
Connector
M-32QR ™
Modulator
M-40X ™ Modulators
M-32 ™
Modulator
FIGURE 3 - BENDIX ® M‑32 ™ AND M‑40X ™ MODULATORS
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.