BENDIX TCH-013-021 Leaflet

Bulletin

© 2012 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group.  3/12.  All Rights Reserved.

The purpose of this Bulletin is to alert technicians investigating an illuminated ABS lamp on trailers equipped 

with Bendix

®

 TABS-6

™

 Trailer ABS Standard (or Premium) modules where the Diagnostic Trouble Code (DTC) 

indicates a Speed Sensor: Loss of Signal error for all sensed wheels.  
This Bulletin covers trailers (triples, doubles, B-Trains, or full trailers) with MULTIPLE Bendix TABS-6 Standard 

(or Premium) modules where the Bendix TABS-6 module receives data over the PLC (Power Line Carrier).  The 

DTCs are incorrectly set when a Bendix TABS-6 module receives a message via the J2497 communication link 

from a second Bendix TABS-6 module which it misinterprets as a message from the tractor indicating that the 

vehicle is moving, while its own sensors do not show any wheels as turning.
For technicians who are diagnosing systems using blink codes:
 (a) in the case of a 2S/1M (two sensor, one modulator) configuration, the DTCs stored correspond to BOTH

a blink code of 2-2 AND ALSO a blink code of 3-2.  

 (b) For a 4S/2M (four sensor, two modulator) configuration, the blink codes found will be ALL FOUR of the

following: 2-2, 3-2, 4-2, AND 5-2.

Technicians can use either of the following two processes to configure the module to disable the J2497 broadcast

options and prevent any further DTCs due to this issue:

1.  Use Bendix

®

 ACom

®

 Diagnostics Software.

The J2497 Broadcast Options can be disabled using Bendix ACom Diagnostics Software. A free

download is available at www.bendix.com, or you may order a CD (item number BW2329) from the 

Literature Center on bendix.com. Bendix ACom Diagnostics communicates via your computer’s 

serial, parallel or USB port through an RP-1210A compliant device that connects to the vehicle’s

diagnostic connector.

OR,
2.  Use a special Bendix

®

Trailer Remote Diagnostic Unit (TRDU) — Part number K069555.

Note: Particular care should be taken to ensure that the TRDU remains connected until the LED

sequence indicating a successful configuration is displayed. Refer to the instruction sheet that

comes with the special TRDU for more details. Failure to complete the configuration can result in

an ECU 6 (Configuration) DTC. Should this occur, re-apply the special TRDU.

Bendix

®

 TABS-6

™

 

Trailer ABS Standard 

(or Premium) Module.

Exterior is the Same.

Trailer 

Adapter

The Special Bendix

®

 

Trailer Remote Diagnostic 

Unit (TRDU) is Identified 

by an Orange Label

Special TRDU

The Premium Bendix

®

 

TABS-6

™

 Module Has an 

18-Pin Connector

The Standard Bendix

®

 

TABS-6

™ 

Module Has a

5-Pin Connector