Bendix Commercial Vehicle Systems EC-60 ESP Controllers (Advanced Models) - Manual (Page 6)

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(If you need to know if this 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 to [email protected] for more
details.
POWER-UP SEQUENCE
NOTICE: The vehicle operator should verify proper operation
of all installed indicator lamps (ABS, ATC/ESP, 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 (Bulb Check)
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/ESP Status/Indicator Lamp Operation
The ECU will illuminate the ATC/ESP 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 continuously illuminate the ATC/
ESP Indicator Lamp whenever ESP or ATC is disabled due
to a diagnostic trouble code.
During an ESP or ATC intervention, the lamp will flash
rapidly (2.5 times per second). When the ECU is placed
in the ATC Mud/Snow (off-road) mode, the lamp will flash
slowly at a rate of once every 2.5 seconds
Trailer ABS Indicator Lamp Operation
The ECU will control the Trailer ABS Indicator Lamp
when a PLC signal (SAE J2497) from a trailer ABS ECU
is detected.
ECU Configuration Test
Within two seconds of the application of ignition power,
the ECU will perform a test to detect system configuration
with regards to the number of wheel speed sensors and
PMVs. This can be audibly detected by a rapid cycling of
the PMVs.
(Note: The ECU will not perform the configuration test when
wheel speed sensors show that the vehicle is in motion.)
Pressure Modulator Valve and Traction Control
Valve Chuff Test
After the performance of the configuration test, the EC-60 ™
controller will perform a Bendix-patented PMV and TCV
Chuff Test. The Chuff Test is an electrical and pneumatic
PMV test that can assist maintenance personnel in verifying
proper PMV wiring and installation.
With brake pressure applied, a properly installed PMV will
perform one sharp audible exhaust of air by activating the
hold solenoid twice and the release solenoid once. If the
PMV is wired incorrectly, it will produce two exhausts of
air or none at all.
FIGURE 10 - VEHICLE ORIENTATION (TYPICAL)
Driver
Right Steer
Left Steer
Right
Additional
Left
Additional
Right Drive
Left Drive
FIGURE 8 - ABS DASH LIGHTS START UP SEQUENCE
*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
Trailer ABS
Indicator Light
(PLC Detected)*
Trailer ABS Indicator
Light
(PLC Not Detected)
Powered Vehicle ABS
Indicator Light
ABS System
Status Indicators
Power
Application
ON
OFF
0.5
ON
OFF
2.0 2.5 3.0 (sec.) 1.5
ON
OFF
ATC/ESP
enabled
No ESP
or ATC
ATC/ESP System
Status Indicator
FIGURE 9 - ATC INDICATOR LIGHT START UP SEQUENCE
ON
OFF
0.5
Power
Application
ON
OFF
2.0 2.5 3.0 (sec.) 1.5