Auto-Configuration; Odometer Function; Non-Standard Tire Size; Diagnostic Trouble Code Detection - BENDIX TABS-6 TRAILER ABS MODULE Manual

AUTO-CONFIGURATION

The Standard TABS-6 module is available only in the 2S/1M
ABS configuration and does not use auto-configuration.
For the Premium TABS-6 module, the default ABS
configuration is 2S/1M. At power-up, if a Premium ECU
detects additional sensors and modulators it will perform an
auto-configuration. Auto-configuration only adjusts upward
(e.g. 2S/2M Side to a 4S/2M Side configuration).
Additional detected components that do not conform to a
legitimate configuration will generate the appropriate faults.
If the vehicle begins moving before the new configuration
has been accepted, the reconfiguration will not take place
at this time.
Additional Components
Default
Sensors Modulators
-
-
2S/1M
2
Dolly Axle
2
-
2S/1M
-
Axle
2
CHART 4 – PREmIUm TABS-6 mOdULE AUTO-
COnFIGURATIOn mATRIx

ODOMETER FUNCTION

Odometer
The TABS-6 module includes an odometer function to
provide a means of storing the accumulated mileage of the
vehicle. The mileage is computed by utilizing information
calculated from the vehicle wheel speeds.
This feature is accurate to within 0.62 miles per power-up
and will typically store mileage up to 1,000,000 miles. The
mileage can be displayed using PC diagnostics or through
blink codes.
Whenever the module is towed using a pre-1997 tractor,
the electronic odometer does not function, and the mileage
can be considered out-of-calibration.
Trip Counter
The module provides a counter to record the trip mileage.
The feature is accessed through PC or handheld diagnostic
tools.
8
Auto-Configuration
- 2S/1M (Dolly-Axle)
1 to 2S/2M (Side)
1 to 4S/2M (Side)
2 to 4S/3M (Side/Axle)
- 2S/1M (Axle)
1 to 2S/2M (Axle)
1 to 4S/2M (Axle)
Service Interval
The TABS-6 module provides a feature that can be used
to indicate a service interval for the trailer. The service
interval can be accessed via PC or hand-held diagnostic
tools. If configured, the TABS-6 module can flash the
indicator lamp when the vehicle is at standstill to indicate
when the service interval has been exceeded.

NON-STANDARD TIRE SIZE

The module 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 module 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, always check that these parameters are
set to match the vehicle.
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 specification for correct values.
Tone ring tooth count is defaulted to 100 teeth and can be
set to 60 to 140 teeth.

DIAGNOSTIC TROUBLE CODE DETECTION

The TABS-6 module contains self-testing diagnostic
circuitry that monitors the ABS components and wiring.
When the module senses an erroneous system condition,
it activates the external trailer-mounted ABS indicator lamp,
disables all or part of the affected ABS functions, and it
stores the fault code in memory, even when the power is
removed. The module also uses PLC communications to
send the system status to the towing vehicle.
For some trouble codes, the TABS-6 module will
automatically reset ("self-heal") the active diagnostic
trouble code when the error is corrected (e.g. when a
wheel speed sensor is re-aligned). However, repeated
occurrences of a given trouble code can cause the code to
"latch" - that is, be retained as active, even if the condition
is only intermittent. Once the code is latched, a manual
reset will be necessary. Technicians can use these latched
codes to assist them in troubleshooting intermittent errors.
After the problem is repaired, trouble codes can be reset
using blink code diagnostics or with a diagnostic tool.
When a trouble code self-heals or is manually reset, the
code remains stored in the ECU memory. This trouble
code history can be retrieved using blink code diagnostics
or with a diagnostic tool.