Bendix Commercial Vehicle Systems EC-60 ESP CONTROLLERS ADV - Manual (Page 7)

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Traction Control Valve (TCV)
Advanced Bendix EC-60 controllers use two TCVs, one on
the steer axle and one on the drive axle. The TCV may be
a separate valve or integrated into the rear axle relay valve.
The controller will activate the drive axle TCV during
differential braking ATC events.
During stability interventions, the ECU will activate both
the steer axle and drive axle TCVs as required.
Stop Lamp Output
The controller provides an output to control a relay
that illuminates the vehicle stop lamps during stability
interventions. This information is also available using the
J1939 serial communications link.
ABS Indicator Lamp Control with Optional
Diagnostic Blink Code Switch
The Advanced Bendix EC-60 controller has internal circuitry
to control the ABS Indicator Lamp on the dash panel.
The ABS Lamp Illuminates:
1. During power up (e.g. when the vehicle is started) for
approximately 3 seconds and turns off after the self test
is completed, providing no Diagnostic Trouble Codes
(DTCs) are present on the ECU.
2. When full ABS operation is not available due to
presence of a DTC on the ECU.
3. If the ECU is unplugged or has no power.
4. When the ECU is placed into the ABS off-road mode
(the lamp flashes steadily at a rate of once per 2.5 sec.).
5. To display blink codes for diagnostic purposes after the
external diagnostic switch is activated.
The Bendix EC-60 controller may communicate with other
vehicle control modules to operate the ABS Indicator Lamp
using serial communications. (If you need to know if this
Bendix ® EC-60 ™ controller uses serial communications to
operate the lamp, e-mail [email protected], specifying the
ECU part number, or call 1-800-AIR-BRAKE and speak to
the Bendix Tech Team.)
Indicator Lamp Control Using Serial
Communications Links
As mentioned above, depending on the vehicle
manufacturer, the dash indicator lamps (ABS, ATC,
ESP and trailer ABS) may be controlled using serial
communications links. In these cases, the EC-60 ™
controller will send a serial communications message over
the J1939 or J1587 links indicating the required status of
the lamp(s). Another vehicle control module receives the
message and controls the indicator lamp(s).
Dynamometer Mode Indicator Lamp Operation
When the Bendix ® EC-60 ™ controller is put into the
Dynamometer mode for testing purposes, the ATC Indicator
Lamp will be illuminated.
Retarder Relay Disable Output
The retarder relay disable output may be used to control a
retarder disable relay. When configured to use this output,
the ECU will energize the retarder disable relay and inhibit
the use of the retarder as needed.
If the ECU is configured for Hill Start Assist (HSA), the
retarder relay output pin is used to control the HSA status
lamp. The vehicle loses the retarder relay function.
SAE J1939 Serial Communications
A Controller Area Network (CAN) data link (SAE J1939) is
provided for communication. This link is used for various
functions, such as:
• To disable retarding devices during ABS operation.
• To request that the torque converter disable lock-up
during ABS operation
• To share information such as wheel speed and ECU
status with other vehicle control modules.
Advanced Bendix EC-60 controllers utilize the J1939 data
link for:
• ATC and drag torque control functions.
• Vehicle stability functions.
Trailer ABS Indicator Lamp Control
The Advanced Bendix EC-60 controller will activate a
trailer ABS Indicator Lamp (located on the dash panel) that
indicates the status of the trailer ABS unit on one, or more
trailers, or dollies that are equipped with PLC functionality.
Typically, the Bendix EC-60 controller directly controls the
trailer ABS Indicator Lamp based on the information it
receives from the trailer ABS, via PLC.
Alternatively, some vehicles require the Bendix EC-60
controller to activate the trailer ABS Indicator Lamp by
communicating with other vehicle controllers using serial
communications.
(If you need to know if this Bendix EC-60 controller uses a
serial communications message to operate the lamp, e-mail
[email protected], specifying the ECU part number, or call
1-800-AIR-BRAKE and speak to the Bendix TechTeam.)
SAE J1708/J1587 Serial Communications
An SAE J1708 data link, implemented according to SAE
J1587 recommended practice, is available for diagnostic
purposes, as well as ECU status messages.
Interaxle Differential Lock Control
(AWD Transfer Case)
Advanced ECUs can control the interaxle differential lock
(AWD transfer case). This is recommended on AWD
vehicles, but the ECU must be specially configured to
provide this feature. E-mail [email protected] for more
details.