Bendix Commercial Vehicle Systems MC-30 TRAILER ABS CONTROLLER - Manual (Page 11)

11
Parameter Default Settings Available Settings
Rolling 500 revs/mile 300 to 700 revs/mile
Radius
Tone Ring 100 teeth 80, 86, 100, 120 teeth
Tooth Count
The tire rolling radius is defaulted to 500 revs/mile and can
be adjusted from 300 to 700 revolutions per mile. Refer to
the manufacturer’s tire specifi cation for correct settings.
Tone ring tooth count is defaulted to 100 teeth and can be
set to 80, 86, 100 or 120 teeth.
FAULT DETECTION
The MC-30 ™ controller contains self testing diagnostic
circuitry that continuously checks for proper operation of
the ABS components and wiring. The MC-30
™ controller
controls a trailer mounted indicator lamp to advise the driver
of the status of the system. The MC-30
™ controller may
also send the system status to the towing vehicle using
PLC communications.
When the MC-30 ™ controller senses an erroneous system
condition, it stores the fault code in memory, activates the
indicator lamp and disables all or part of the affected ABS
functions. The faulted component is also identifi ed on the
MC-30
™ controller diagnostic display.
In some instances, the MC-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
assists the technician in troubleshooting intermittent faults.
The fault code is stored in the MC-30
™ controller’s 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 MC-30
™
controller’s diagnostic display. Fault codes can also be
reset with blink code diagnostics 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 with
blink code diagnostics or with a diagnostic tool.
MC-30 ™ Controller ABS Partial Shutdown
Depending which fault is detected, the ABS function may
be completely or partially disabled. Even with the ABS
indicator lamp on, dual modulator confi gurations may still
provide some level of ABS function on wheels that are not
affected by the fault. Single modulator confi gurations are
completely disabled for any single fault.
ECU Fault
All functions are completely disabled. The system reverts
to normal braking.
Voltage Fault
While voltage is out of range, ABS function is disabled. The
system reverts to normal braking. When the correct voltage
level is restored, full ABS function is available. Operating
voltage range is 8.0 to 16.0 VDC.
OTHER CONFIGURABLE PARAMETERS
The MC-30 ™ controller has various confi gurable function
parameters that can be enabled to provide the user with
additional customized features. The default settings for
these parameters are chosen by the vehicle OEM. The
configurable features include serial communications
message broadcasts, alternative lamp control, various I/O
recognition, ABS control settings and others. To ensure
that the replacement unit has the correct default settings,
reference the original part number. These settings can be
altered using a diagnostic tool. For further information,
contact Bendix or refer to your local authorized Bendix
dealer.
ODOMETER FUNCTION
The MC-30 ™ controller’s odometer function stores the
accumulated mileage of the vehicle. The mileage will be
calculated using wheel speed sensor information. Every
1.0 mile accumulated during powered operation will be
recorded.
Mileage will only be recorded while the MC-30 ™ controller
is powered. If stop light power is the only power source to
the MC-30
™ controller, correct accumulated mileage will
not be recorded.
The odometer will store vehicle mileage up to 9,999,999
miles. When the odometer mileage counter function is
full, it will latch and not record or calculate any additional
mileage.
The odometer mileage can be read using a diagnostic
tool or blink code diagnostics. Refer to the Blink Code
Diagnostics section for further information.
The odometer mileage can be cleared or reset using a
diagnostic tool. This function is password protected.
It is necessary to properly confi gure wheel rolling radius
and tone ring tooth count for accurate odometer mileage
to be accumulated.
Calibration of Non-Standard Wheel Sizes
The MC-30 ™ controller allows for tire rolling radius and tone
ring tooth count parameters to be set for each axle using a
diagnostic tool. These adjustments may be necessary for
the MC-30
™ controller to accurately calculate the vehicle
velocity and odometer mileage. Wheels of the same axle
must be set to the same rolling radius and tone ring tooth
count.
In most cases, these parameters are set by the trailer OEM
and do not need to be adjusted. In the case of a service
replacement unit, these parameters will need to be adjusted
if the default settings do not match the vehicle.
CHART 8 - WHEEL SIZE CALIBRATION FACTORS