Power-Up Sequence - BENDIX EC-60 ABS-ATC STD-PREM CONTROLLERS Introduction Manual

ABS System
Status Indicators
Powered Vehicle ABS
Indicator Light
Trailer ABS
Indicator Light
(PLC Detected)*
Trailer ABS
Indicator Light
(PLC Not Detected)
*Some vehicle manufacturers may illuminate the trailer
ABS indicator lamp at power-up regardless of whether a
PLC signal is detected from the trailer or not. Consult the
vehicle manufacturer's documentation for more details.
FIGURE 6 - ABS DASH LIGHTS START UP SEQUENCE
Trailer ABS Indicator Lamp Control
Certain models of the EC-60
ABS Indicator Lamp (located on the dash panel) that
indicates the status of the trailer ABS unit on one, or more
trailers, or dollies. Typically, the EC-60
controls the trailer ABS Indicator Lamp based on the
information it receives from the trailer ABS.
Alternatively, some vehicles require the EC-60
to activate the trailer ABS Indicator Lamp by communicating
with other vehicle controllers using serial communications.
(If you need to know if your EC-60
communications message to operate the lamp, e-mail
ABS@bendix.com, 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.
ATC Lamp Output/ATC Off-Road Switch Input
Premium ECUs control the ATC dash lamp.
The ATC Lamp Illuminates:
1. During power up (e.g. when the vehicle is started) and
turns off after the self test is completed, providing no
diagnostic trouble codes are present.
2. When ATC is disabled for any reason.
3. During an ATC event (the lamp will flash rapidly).
4. When the ECU is placed in the ATC off-road mode (the
lamp will flash slowly at a rate of 1.0 seconds on, 1.5
seconds off). This notifies the vehicle operator that the
off-road mode is active.
Power
Application
0.5 2.0 2.5 3.0 (sec.)
1.5
ON
OFF
ON
OFF
ON
OFF
™
controller activate a trailer
™ controller directly
™
controller
™
controller uses a serial
ATC System
Status Indicator
Engine torque limiting
and differential braking
enabled
No ATC
FIGURE 7 - ATC INDICATOR LIGHT START UP SEQUENCE
Interaxle Differential Lock Control (AWD Transfer Case)
Premium 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 to ABS@bendix.com for more details.

POWER-UP SEQUENCE

WARNING: The vehicle operator should verify proper
operation of all installed indicator lamps (ABS, ATC, and
trailer ABS) when applying ignition power and during vehicle
operation.
Lamps that do not illuminate as required when ignition power
is applied, or remain illuminated after ignition power is
applied, indicate the need for maintenance.
ABS Indicator Lamp Operation
The ECU will illuminate the ABS Indicator Lamp for
approximately three seconds when ignition power is applied,
after which the lamp will extinguish if no diagnostic trouble
codes are detected.
The ECU will illuminate the ABS Indicator Lamp whenever
full ABS operation is not available due to a diagnostic trouble
code. In most cases, partial ABS is still available.
ATC Status/Indicator Lamp Operation
The ECU will illuminate the ATC lamp for approximately 2.5
seconds when ignition power is applied, after which the
lamp will extinguish, if no diagnostic trouble codes are
detected.
The ECU will illuminate the ATC Indicator Lamp whenever
ATC is disabled due to a diagnostic trouble code.
Trailer ABS Indicator Lamp Operation
Certain models of the ECU will control the Trailer ABS
Indicator Lamp when a PLC signal (SAE J2497) from a trailer
ABS ECU is detected.
Power
Application
0.5 1.5 2.0 2.5 3.0 (sec.)
ON
OFF
ON
OFF
5