J1708/J1587 Diagnostic Link; Auxiliary I/O; Bendix; Flex - BENDIX TABS-6 Service Data

Tank (Nipple) Mounted
The Bendix BR9235 Modulator Relay Valve (MRV) can
® ™
be tank-mounted using a schedule 80 (heavy gauge steel)
3/4" NPT nipple directly between the trailer supply tank and
the supply port. A tank with a reinforced port must be used.
Bracket (Chassis) Mounted
The Bendix BR9235 MRV provides an option with a
bracket for frame mounting directly to the trailer frame rail
or crossmember. It is recommended to use two Grade 5,
3/8-16 bolts, torqued to 180 – 220 in-lbs.

J1708/J1587 DIAGNOSTIC LINK

The Premium Bendix TABS-6
®
J1587 diagnostic link with data and power to communicate
with the vehicle and various diagnostic tools. Diagnostics,
testing, configuration, data transfer and other functions can
be performed using this link. Diagnostic tools such as the
MPSI Pro-Link ™ device and Bendix
Software (version 6.5 and higher) support the Bendix
TABS-6 module.
Ignition power must be provided to the Bendix TABS-6
module for the diagnostic link to be active.

AUxILIARy I/O

The Standard module provides for one auxiliary I/O
function.
The Premium module provides for up to five auxiliary
functions and one additional ground. See Chart 3, below.

Bendix

ACom Diagnostic Software (version 6.5 and
® ®
higher) supports the configuration of the Bendix TABS-6
module auxiliary I/O's.
BENDIx

FLEx

ABS PROGRAM

® ™
A Bendix Flex ABS program uses Auxiliary Design
® ™
Language (ADL) to allow customized auxiliary functions to
be carried out by the Bendix TABS-6 module. Functions
developed in the Bendix Flex ABS program may be
downloaded at the production line or in the field to control
non-braking functions of the trailer.
For example, a Bendix Flex ABS program can potentially
communicate the status of: tire inflation and/or temperature;
reefer temperature; load presence; slider-pin position; lift
axle position; proximity/reverse alarm; and vehicle weight.
Name ECU ECU Pin Auxiliary Functions
AUX1 Premium
AUX2 Premium
AUX3 Premium
AUX4 Premium
AUX5 Premium
AUX6 Premium
CHART 3 – AUxILIARy I/OS And dEFAULT FUnCTIOnS
module provides a J1708/
™
® ACom ® Diagnostic
16 • High-Side Driver... or Digital Input
10 • High-Side Driver... or Digital Input
15 • High-Side Driver... or Digital Input
9 • High-Side Driver... or Digital Input
4 • Low-Side Driver... or Analog Input
2 • High-Side Driver... or Digital Input
The Bendix Flex ABS program can monitor the auxiliary I / Os
and/or the SAE J1587 diagnostics and SAE J2497 PLC data
links. Contact your Bendix Account Manager to discuss a
Bendix Flex ABS program for your vehicle(s).

CUSTOMER SCRATCH PAD

The Bendix TABS-6 module has a Customer Scratch Pad
feature which allows the customer, or end-user, to store up
to 756 bytes of information. This information can then be
read using the Bendix ACom Diagnostic Software (version
6.5 and higher).
If additional scratch pad space is needed, this storage
space can be expanded to 1K (1,008 bytes total of data).
Contact Bendix for further details.

POWER-UP SEQUENCE

At power-up, the Bendix TABS-6 module performs a series
of self-checks that can assist a technician to determine the
ABS system status and configuration.
Trailer ABS Indicator Lamp
At power-up without detected Diagnostic Trouble Codes
(DTCs), the trailer ABS indicator lamp will turn on for 2.5
seconds as a bulb check and then turn off. See Figure 8.
If a PLC-ready towing vehicle and trailer are powered at the
same time, the Bendix TABS-6 module will also trigger a
bulb check on the dash-mounted trailer ABS indicator lamp.
Modulator Chuff Test at Power-Up
At power-up, the Bendix TABS-6 module activates a
modulator chuff test. This electrical and pneumatic ABS
modulator test can help the technician identify problems
with modulator installations and/or wiring.
With brake pressure applied, a properly installed modulator
will cause five (5) rapid audible chuffs of air pressure. If
additional modulators are installed, the Bendix TABS-6
module activates five (5) chuffs at the internal modulator
(MOD1) then five (5) chuffs for each additional modulator
in sequence (e.g. MOD1, then MOD2, and then MOD3).
The chuff sequence is then repeated.
If the modulator is wired incorrectly, the modulator will
only produce one chuff, or no chuff at all. If an issue is
detected during the modulator chuff test, compare the
modulator wiring and plumbing to the Bendix TABS-6
module's electrical system schematic (see page 19) and
make repairs.
Default Function
Modulator 3 (MOD3) Hold Solenoid
Modulator 3 (MOD3) Release Solenoid
Modulator 2 (MOD2) Hold Solenoid
Modulator 2 (MOD2) Release Solenoid
Modulator 3 (MOD3) Common
J1587 Diagnostic Power
7