Bendix Commercial Vehicle Systems EC-30 ABS/ATC CONTROLLER 2/08 - Manual (Page 5)

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Trailer ABS Warning Lamp
EC-30 ™ controller models with PLC can be confi gured to
control a trailer ABS warning lamp (located in the dash) that
indicates the status of the trailer ABS unit of one or more
trailers or dollies. The EC-30
™ controller directly controls
the trailer ABS warning lamp by providing a ground path
when the lamp is to be activated. Pin E2, of the 30-pin
connector, is the trailer ABS warning lamp output.
J1939/J1587 Trailer ABS Warning Lamp
The EC-30 ™ controller can be confi gured to broadcast
the trailer ABS status over the SAE J1939 or the SAE
J1587 serial communications links. In this case, a vehicle
controller will directly operate the trailer ABS warning
lamp. When confi gured in this manner, there is no wire
installed in pin E2 of the 30-pin connector. In the event that
communications is lost between the EC-30
™ controller and
the vehicle controller, the dash controller will activate the
trailer ABS warning lamp.
J1708/J1587 Diagnostic Link (J1939)
The EC-30 ™ controller provides a J1708/J1587 diagnostic
link to communicate with the vehicle and various diagnostic
tools. Diagnostics, system confi guration, data uploading
and downloading and other functions can be performed
using this link. The EC-30
™ controller is supported by tools
such as Bendix ® ABS Diagnostic Software, the Bendix ®
DCI hand held tool and the MPSI ProLink. The EC-30 ™
controller may also provide diagnostics using the SAE
J1939 serial communications link.
J1939/1922 Engine Torque Reduction - ATC
The EC-30 ™ controller can be confi gured to reduce engine
torque over the SAE J1939 (J1922 for some service
replacement models) serial communications link. The
EC-30
™ controller will send a J1939 message to reduce
engine torque during ATC operation.
ATC Active/Warning Lamp
Premium EC-30 ™ controller models confi gured for ATC can
control an ATC active/warning lamp to indicate the status of
the ATC system. The ATC active/warning lamp fl ashes when
ATC is active and stays on if an ATC system fault is detected
or ATC is disabled by the ATC enable/disable switch. The
EC-30
™ controller directly controls the ATC active/warning
lamp by providing a ground path when the lamp is to be
activated. Pin C2, of the 30-pin connector, is the ATC
active/warning lamp output.
J1939 ATC Active/Warning Lamp
Premium EC-30 ™ controller models confi gured for ATC can
be confi gured to broadcast the status of the ATC active/
warning lamp over the SAE J1939 serial communications
link. In this case a vehicle dash controller directly operates
the ATC active/warning lamp. When confi gured in this
manner, there is no wire installed in pin C2 of the 30-pin
connector. In the event that J1939 communications are
lost between the EC-30
™ controller and the vehicle dash
controller, the dash controller will activate the ATC active/
warning lamp.
ATC Modulator
Premium EC-30 ™ controller models configured for
differential braking ATC will activate the ATC modulator
during ATC situations. The ATC modulator is an electrically
controlled air valve integral to the ATR valve. Pins D2 and
D3, of the 18-pin connector, control the ATC modulator. A
connection to the ATC modulator is provided via a two-pin
Deutsch connector from the ATR valve. See fi gure 2.
ABS Warning Lamp
The EC-30 ™ controller controls an ABS warning lamp
to indicate the ABS unit status. The EC-30 ™ controller
provides a ground signal to activate an ABS warning lamp
relay and turn the ABS lamp off. The actual ABS warning
lamp is connected to the normally-closed contacts of the
relay in order to illuminate in a fail-safe manner during an
ABS ECU failure. Pin E3, of the 30-pin connector, is the
ABS warning lamp output.
J1939 ABS Warning Lamp
The EC-30 ™ controller can be confi gured to broadcast the
ABS status over the SAE J1939 serial communications
link. A vehicle dash controller directly controls the ABS
warning lamp. When confi gured in this manner, there is no
wire installed in pin E3 of the 30-pin connector. If J1939
communications is lost between the EC-30
™ controller and
the vehicle dash controller, the dash controller will activate
the ABS warning lamp.
Retarder Disable Relay
The EC-30 ™ controller controls an engine or transmission
retarder disable relay. The retarder activation wire is routed
through the normally-closed contacts of the relay. The
EC-30
™ controller provides a ground path to activate
the relay and interrupt power to the retarder during ABS
operation. This output may also connect directly to a
transmission ECU. Pin K1, of the 30-pin connector, is the
retarder disable relay output.
J1939/J1922 Retarder Disable
The EC-30 ™ controller can be confi gured to interrupt the
engine or transmission retarder over the SAE J1939 serial
communications link. (J1922 for some service replacement
models). The retarder will be disabled during ABS via the
serial communications. When confi gured in this manner,
there is no wire installed in pin K1 of the 30-pin connector.
Use of the retarder disable function via the serial link may be
essential to ABS performance and is highly recommended
for vehicles equipped with a capable retarder.
J1939/J1922 Torque Converter Lock Disable
The EC-30 ™ controller can be confi gured to interrupt the
automatic transmission torque converter lock function,
over the SAE J1939 serial communications link. (J1922
for some service replacement models). The converter lock
will be disabled during ABS via the serial communications.
Use of the torque converter lock disable function may be
essential to ABS performance and is highly recommended
for vehicles equipped with a capable transmission.