User's Manual

11
17. NON‑STANDARD TIRE SIZE
The Bendix
®
TABS‑6
™
Adv module allows for tire rolling
radius and tone ring tooth count parameters to be set for
the axle being sensed using the Bendix
®
ACom
®
diagnostic
software. These adjustments may be necessary for the
module to accurately calculate the vehicle velocity and
odometer mileage. Wheels of the same axle must have,
and be set to the same, rolling radius and tone ring tooth
count. Referto themanufacturer’stire specicationfor
correct values.
Thetoneringsizeisdefaultedto100teeth,andthetire-
rolling radius is defaulted to 511 revolutions per mile. These
parameterscanbeadjustedasshowninChart4.
Tone Ring
Size
Tire Rolling Radius –
Allowable Range
60teeth 712to1005rpm’s
80teeth 512to801rpm’s
90teeth 456 to 711 rpm’s
100teeth 410to640rpm’s
120teeth 356to502rpm’s
CHART 4 – TONE RING SIZE TO TIRE ROLLING RADIUS
18. DIAGNOSTIC TROUBLE
CODE DETECTION
The TABS‑6 Adv module contains self‑testing diagnostic
circuitry that monitors the ABS components and wiring.
When the TABS‑6 Adv module senses an erroneous
system condition, it activates the external trailer‑mounted
ABS indicator lamp; disables all or part of the affected
ABSand/orTRSPfunctions;anditstorestheDiagnostic
TroubleCode(DTC)inmemory,sothattheinformationis
retained even when the power is removed. The TABS‑6
AdvmodulealsousesPLCcommunicationstosendthe
system status to the towing vehicle.
For some trouble codes, the TABS‑6 Adv module will
automaticallyreset(“self-heal”)theactiveDTCwhenthe
error is corrected (e.g. when a wheel speed sensor is re‑
aligned).However,repeatedoccurrencesofagivenDTC
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, the DTC can be reset using blink code
diagnostics, or with a diagnostic tool.
When a DTC self-heals or is manually reset, the code
remainsstoredasaninactiveDTCintheECUmemory.
This inactive DTC can be retrieved using blink code
diagnostics or with a diagnostic tool.
19. PARTIAL ABS SHUTDOWN
Depending on the DTC detected, theABS ECU will
partially or completely disable the ABS and/or Bendix
®
TRSP
®
functionality. In cases where the ABS is completely
disabled, the vehicle reverts to normal braking (without
ABSorTRSPinterventions).AlwaysrepairABSDTCsat
the earliest opportunity.
ECU Diagnostic Trouble Codes
All ABS functions are completely disabled. The system
reverts to normal braking.
Voltage Diagnostic Trouble Code
Theoperating voltagerange is8.0 to32.0 VDC.If the
voltage is detected as being out of range, the ABS and
TRSP system braking features will be disabled, and the
system reverts to normal braking. When the correct voltage
level is restored, full ABS and TRSP is typically available
again.
20. BLINK CODE DIAGNOSTICS
The TABS‑6 Adv module provides diagnostic functions
through blink code diagnostics. This means that the
technician — even without diagnostic tools — can read a
seriesofABSindicatorlampblinkstodiagnosetheDTCs
being generated.
With no towing vehicle attached, enter the blink code
diagnostics mode by providing constant power to the
ignition circuit and then toggling the brake light power
inputthespecicnumberoftimesshowninChart5,for
the desired mode.
With a parked towing vehicle attached, apply ignition power,
andafterthepower-upsequenceiscomplete,enterthe
diagnostics mode by depressing and releasing the brake
pedalthespecicnumberoftimesshowninChart5,for
the desired mode.
CyclestoEnterDesiredMode
Mode Cycles
ActiveDTCRetrieval 3
InactiveDTCRetrieval(DTCHistory) 4
ClearActiveDTCs 5
OdometerMileageDisplay 7
CHART 5 – BLINK CODE INFORMATION
Dependingontheblinkcodemodeactivated,theTABS-6
Adv module will blink the trailer‑mounted ABS indicator
lamp to display: active DTC codes;inactive DTCs; and
odometer mileage. Blink code diagnostics can also be
usedtoclearactiveDTCs.