BENDIX EC-13 TRAILER ANTILOCK CONTROL Manuel - Page 7
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Removing a Bracket Mounted Remote EC-13
1. Disconnect the electrical connector (on the vehicle
wiring harness) from the EC-13
2. Note and mark the mounting position of the EC-13
controller assembly on the trailer. Loosen, remove and
save the mounting hardware that attaches the EC-13
controller bracket to the trailer. Remove the EC-13
controller and bracket assembly from the trailer.
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INSTALLING EC-13
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Installing the EC-13
Controller and M-12
1. After noting the positioning marks made prior to
disassembly, reconnect the M-12
harness to the EC-13
on the EC-13
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controller then secure the EC-13
controller to the M-12
screws. Torque the cap screws to 50-80 lbs. in.
2. Mount the assembled MC-13
the trailer and orient it in the position marked prior to
removal.
3. Reconnect all air lines.
4. Reconnect the electrical connector (on the vehicle
wiring harness) to the EC-13
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5. Test the MC-13
modulator controller for operation and
air leakage prior to placing the trailer in service.
6. Perform the "Initial Start-up Procedure" in the
TROUBLESHOOTING section to assure proper
antilock system operation.
INSTALLING A BRACKET MOUNTED REMOTE
EC-13
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CONTROLLER
1. Using the mounting hardware retained in step 2 of the
removal mount the EC-13
noted during removal.
2. Reconnect the electrical connector (on the vehicle
wiring harness) to the EC-13
DIAGNOSING AND LOCATING A SYSTEM
PROBLEM
GENERAL
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The EC-13
controller contains self test and diagnostic
circuitry that continuously checks for proper operation of
the entire antilock system including wiring continuity. An
optional condition lamp, controlled by the EC-13
advises the driver of the condition of the entire antilock
system.
The condition of specifi c antilock components is provided
to the mechanic by a series of labeled, light emitting
diodes (LEDs) displayed through a "window" in the
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EC-13
controller housing. No special tools or equipment
are needed to read or interpret the EC-13
diagnostics window. It should be noted that the diagnostics
display is separate from the antilock condition lamp on
the trailer. With this separation, the driver is aware of any
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Controller:
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controller.
CONTROLLER ASSY
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Modulator:
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modulator wire
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controller, position the gasket
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modulator using the four cap
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modulator controller on
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controller.
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controller in the position
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controller.
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controller,
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controller
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EC-13
Controller
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FIGURE 7 - EC-13
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problems that occur but is not confused by the diagnostic
information.
A special feature of the EC-13
system is its problem indication latching. Intermittent
problems, particularly in the wheel speed sensing area can
be diffi cult to diagnose. When the controller senses an
erroneous condition, whether in the controller electronics,
the modulator or speed sensing areas, it stores the
condition in non-volatile memory, disables the antilock
function if necessary, illuminates the condition lamp and
the appropriate diagnostic LEDs on the EC-13
The condition is truly stored and is not cleared by loss of
power to the EC-13
when power is restored and remain illuminated until the
problem is corrected. After the actual problem is corrected,
maintenance personnel can clear or reset the EC-13
controller diagnostics by passing a small magnet over the
RESET point in the diagnostics window.
DIAGNOSTIC LEDS
There are nine LEDs plus a magnetically actuated reset
switch in the EC-13
fi rst fi ve LEDs locate a problem to a specifi c area of the
trailer while the last four indicate the problem component
or its wiring. The LEDs are computer controlled and are
either ON or OFF depending upon their monitor function.
(Note: Right and left, front and rear are determined from
the driver's seat. Left front is therefore the corner closest
to the driver.)
LED
o FRONT Red LED
LED
o MID
Red LED (SEE NOTE BELOW)
LED
o REAR Red LED
LED
o RIGHT Red LED
LED
o LEFT
Red LED
LED
o MOD
Red LED
LED
o SENS
Red LED
LED
o ECU
Red LED
LED
o VOLT
Green LED
¦ ¦ ¦
RESET
No LED
Diagnostic
CONTROLLER DIAGNOSTIC WINDOW
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controller diagnostic
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controller. The LEDs will re-light
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controller diagnostic window. The
EC-13
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Controller
Window
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controller.
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7