Bendix Commercial Vehicle Systems EC-30 ABS/ATC CONTROLLER 2/08 - Manual (Page 8)

8
AUTO-CALIBRATION
Auto-calibration is a feature that allows the EC-30 ™
controller to compensate for tire size changes throughout
the life of the vehicle. Auto-calibration is needed for proper
ATC performance. The EC-30
™ controller will perform an
auto-calibration when the tire size difference exceeds
approximately 4 percent.
Tire size (rolling radius) setting information can be retrieved
or adjusted by using Bendix ABS Diagnostics Software or
MPSI.
If issues occur with the ATC function following a tire size
change, contact Bendix or refer to your local authorized
Bendix dealer.
EC-30 ™ CONTROLLER CONFIGURABLE
PARAMETERS
The EC-30 ™ controller has various confi gurable function
parameters that can be enabled to provide the user with
additional or customized features. The default settings
for these parameters are chosen by the vehicle OEM.
The confi gurable features include serial communications
message broadcasts, alternative lamp control, various I/O
recognition, ABS control settings and others. To ensure
that the unit you are working with has the correct default
settings, use only the correct replacement part number.
However, most of these settings can be altered using the
Bendix ABS Diagnostic Software program. For further
information, contact Bendix or refer to your local authorized
Bendix dealer.
EC-30 ™ CONTROLLER SELF-CONFIGURATION
The self-confi guration feature allows wheel speed sensor
and ATC confi gurations to be altered when activated with
a magnet or diagnostic tool. This is generally performed
shortly after installing or replacing an EC-30
™ controller.
Self-Confi guration of Wheel Speed Sensors
The number of speed sensors connected to the EC-30 ™
controller will be detected during the self-confi guration
process. The EC-30
™ controller will configure for six
sensors if it detects one or both Mid sensors. If only one Mid
sensor is detected, the ABS warning lamp and appropriate
diagnostic LEDs will illuminate following the self-confi gure.
If no Mid sensors are detected, the EC-30
™ controller will
confi gure for four sensors.
Self-Confi guration of ATC
In order to self-confi gure for engine torque limiting ATC,
the following must be connected to the EC-30
™ controller
and be operational:
- J1939 or J1922 communication link to the engine
- ATC active/warning lamp
- ATC enable/disable switch (must be toggled prior to
self-confi guration)
In order to self-confi gure for differential braking ATC, the
ATC modulator must also be connected to the EC-30
™
controller and be operational.
Some EC-30 ™ controller part numbers will not support six
wheel speed sensors or ATC. To ensure that the EC-30 ™
controller you are working with has the correct hardware
capability, use only the correct replacement part number.
EC-30 ™ Controller Self-Confi guration Procedure
Verify that all ECU, communication, sensor, ABS modulator
and ATC modulator connectors are in place and then turn
the ignition power on. Toggle the ATC enable/disable
switch, if equipped.
Activate an EC-30 ™ controller self-confi guration by one of
the following actions:
- Hold a magnet on the reset location of the diagnostic
display for about 20 seconds (until the LEDs begin to
rapidly roll), then remove the magnet.
- Press the DCI reset switch for about 20 seconds (until
the LEDs begin to rapidly roll), then release the switch.
- Use the self-confi guration menu selection on Bendix
ABS Diagnostic Software or the MPSI tool.
When the self-configuration process is complete, the
EC-30
™ controller will automatically go through the power-
up sequence and show the new confi guration on the
diagnostic display. If the EC-30
™ controller was properly
confi gured for ATC, the ATC active/warning lamp will also
show the ATC confi guration. Refer to the EC-30
™ controller
Power-Up Sequence section.
FAULT DETECTION
The EC-30 ™ controller contains self-testing diagnostic
circuitry that continuously checks for proper operation of the
ABS/ATC components and wiring. The EC-30
™ controller
controls dash mounted warning lamps to advise the driver
of the status of the system.
When the EC-30 ™ controller senses an erroneous system
condition, it stores the fault code in memory, activates the
appropriate warning lamp and disables all or part of the effected
ABS or ATC functions. The faulted component is also identifi ed
on the diagnostic display on the EC-30
™ controller.
In most cases, the EC-30 ™ controller will automatically reset
(self-heal) the active fault code when the fault is corrected.
However, repeated occurrences of a given fault will cause the
fault code to latch. Once the fault code is latched, a manual reset
is required. Latching of faults can assist in the troubleshooting
of intermittent faults. The fault code is stored in the EC-30
™
controller memory, even when power is removed.
After repair, latched fault codes can be reset by briefl y
holding a magnet on the reset location of the EC-30
™
controller diagnostic display. Fault codes can also be reset
with the blink code switch or with a diagnostic tool.
When a fault self-heals or is manually reset, the fault code
remains in fault history. Fault history can be retrieved by
using blink code diagnostics or a diagnostic tool.