User's Manual

7
2. Do not pierce wire insulation when testing. Check
for power, ground or continuity by disconnecting the
connector and testing the individual pins or sockets in
the connector.
3. Always check the vehicle hand book for wire and
connector identifi cation. Individual wire identifi cation
will differ depending upon the type of connectors in use,
the vehicle manufacturer, and the system features in
use.
4. While the retarder disable and serial link connections
(3 total) are present on all EC-15
™
controllers they are
not always used.
PREVENTATIVE MAINTENANCE
Every 3 months; 25,000 miles; or 900 operating hours,
1. Check all wiring and connectors to ensure they are
secure and free from visible damage.
2. Although the EC-15
™
controller incorporates a self
check diagnostics, the LED display should be inspected
to ensure that they are functional. With the vehicle
ignition on, a magnet (800 gauss; capable of picking up
3 ounces) held to the LED reset switch should cause
all of the LED’s to illuminate. If one or more of the
LED’s DO NOT ILLUMINATE and the antilock condition
lamp on the dash indicates the system is functioning
properly, the non-illuminated LED(s) should be noted
for future reference. Although the diagnostic capabilities
will be limited, the system will continue to function as
designed.
3. Road test the vehicle by making antilock stop from a
vehicle speed of 20 miles per hour. When an antilock
stop is made, the modulator solenoids pulsate and an
audible burst of air can be heard from outside of the
cab. The wheels should not enter a prolonged “lock”
condition.
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID PERSONAL
INJURY OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2. Stop the engine and remove 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.
3. 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.
4. 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 an
AD-IS
®
air dryer system or a dryer reservoir module,
be sure to drain the purge reservoir.
5. Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a
manner that safely removes all electrical power
from the vehicle.
6. Never exceed manufacturer’s recommended
pressures.
7. 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.
8. Use only genuine Bendix
®
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.
9. 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.
10. Prior to returning the vehicle to service, make
certain all components and systems are restored
to their proper operating condition.
11. For vehicles with Antilock 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.
REMOVING THE EC-15
™
CONTROLLER
ASSEMBLY
EC-15
™
CONTROLLER MOUNTED ON ANTILOCK
RELAY VALVE
1. Identify and remove all air lines connected to the unit.
2. Disconnect the electrical connector(s) from the EC-15
™
controller.
3. Note and mark the mounting position of the controller/
relay valve assembly on the vehicle. Loosen, remove
and save the nuts on the mounting hardware that
attaches the controller relay assembly bracket to the
vehicle. Remove the relay valve and EC-15
™
controller
assembly from the vehicle.
4. Remove as much contamination as possible from
the exterior of the assembly making sure to keep the
contamination away from the open ports.
5. Note and mark the position of the EC-15
™
controller
relative to the antilock relay valve. Remove and retain
the four cap screws that secure the EC-15
™
controller to
the antilock relay valve. Carefully separate the EC-15
™
controller from the antilock relay valve making certain