User's Manual

9
10. SAE J2497 (PLC) DIAGNOSTIC LINK
All newer towed vehicles transmit a signal over the power
linetothetowingvehicleABSECU.Thesignal,usinga
heavy vehicle industry standard known as PowerLine
Carrier(PLC\J2497),isbroadcastbythetrailerABSECU
overthebluewire(ignitionpowerline)oftheSAEJ560
connector and controls an in‑cab trailer ABS indicator lamp.
See Figures 7 and 8.
FIGURE 7 - POWER LINE WITHOUT PLC SIGNAL
FIGURE 8 - POWER LINE WITH PLC SIGNAL
The Bendix
®
TABS‑6
™
Adv MC module provides a data link
forPLCcommunicationfollowingtheSAEJ2497standard.
Bendix
®
ACom
®
 diagnostics software (version 6.1 and
higher) and the Bendix
®
TrailerRemote Diagnostic Unit
(TRDU
™
) both support PLC communication with the
TABS‑6 Adv MC module.
PLC communication is applicable for 12-volt vehicle
applicationsonly.ThePLCcommunicationisdisabledfor
voltagesgreaterthan18volts.
Identifying and Measuring the PLC Signal
ATABS-6AdvMCmodulewillcontinuouslybroadcastPLC
messages that indicate trailer ABS status. At power‑up,
or during a trailerABS diagnostic Trouble Code (DTC)
condition, the TABS‑6 Adv MC module will signal the
tractor ABS unit to illuminate the dash‑mounted trailer ABS
indicator lamp.
Diagnostic tools are available that detect the presence
ofa PLCsignal andperform further systemdiagnostics
directly, using the power line. For more information on
these diagnostic tools, contact Bendix or refer to your local
authorized Bendix dealer or distributor.
An oscilloscope can also be used to verify the presence
andstrengthofaPLCsignalonthepowerline.ThePLC
signal is an amplitude and frequency modulated signal.
Dependingontheloadonthepowerline,theamplitude
ofthePLCsignalcanrangefrom2.5mVp-pto7.0Vp-p.
Suggestedoscilloscopesettingsare(ACcoupling,1volt/
div,100µsec/div).Thesignalshouldbemeasuredonpin7
oftheJ560connectoratthenoseofthetrailer.
11. SAE J1939 (CAN) DIAGNOSTIC LINK
The TABS‑6 Adv MC module provides a data link for
transmitting CAN information following the SAE J1939
standard.
Bendix
®
ACom
®
 diagnostics software (version 6.1 and
higher) and the Bendix
®
Trailer Information Module both
support CAN communication with theTABS-6Adv MC
module.
Ignition power must be provided to the TABS‑6 Adv MC
module for the diagnostic link to be active.
12. AUXILIARY I/O
The TABS‑6 Adv MC module provides for up to six auxiliary
input/output(I/O)functions.See Chart 3.
Name
12-Pin
ECU
Conn.
(X2)
Auxiliary Functions
Auxiliary
Type
AuxI/O1
(AuxIO1)
1
High-SideDriver Output
DigitalInput Input
AuxI/O2
(AuxIO2)
2
High-SideDriver Output
DigitalInput Input
AuxI/O3
(AuxIO3)
3
High-SideDriver Output
DigitalInput Input
AuxRet12 11 Low-SideDriver Output
AuxRet3 12 Low-SideDriver Output
Sens_Sup 4 +5V Sensor Supply Output
Sens_In 5 Analog Input Input
Sens_Gnd 6 Low-SideDriver Input
CHART 3 – AUXILIARY I/OS
Bendix
®
ACom
®
 diagnostic software (version 6.1 and
higher)supportsthecongurationoftheTABS-6AdvMC
moduleauxiliaryI/Os.