Bendix Tch 013 024 Users Manual

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Technical Bulletin

Bulletin No: TCH-013-024 Effective Date: October 25, 2013 Cancels: NA Page: 1 of 2

Subject: Bendix

®

TABS-6

™

Advanced Single-Channel Trailer ABS: Troubleshooting

“Internal Lateral Acceleration Sensor - Mounting Error” Diagnostic Trouble Codes

The purpose of this Bulletin is to assist technicians

when troubleshooting Bendix® TABS‑6™ Advanced

single‑channel trailer ABS modules, where an “Internal

Lateral Acceleration Sensor ‑ Mounting Error” (internal

code 14D00, or SID‑FMI 99‑14, or blink code 8‑1), is

causing an illuminated trailer ABS lamp.

P/Ns K027233, K029053, K027235, K032041, K032042,

K027241, K035805, K032108, K041383, and K065528.

This Bulletin covers the potential causes for this DTC.

A1. Check the orientation of the Electronic

Control Unit (ECU) installation.

Each Bendix TABS‑6 Advanced ECU comes

precongured for a certain orientation. Use the Bendix®

ACom® Diagnostics software [free software downloads

are available at www.bendix.com] to view the current

congured orientation of the ECU on the Controller

Conguration screen. Then use Figure 1 below to verify

if the TABS‑6 Advanced ECU is installed as congured.

• If the conguration matches, go to B.

A2. If the congured orientation does not match the

physical orientation, use the Bendix ACom diagnostic

software to:

• change the congured orientation to match the

installation;

• verify that the speed sensors are installed correctly

for this congured orientation (see Figure 1); and

• perform an End‑of‑Line Test (EOL Test) using the

software or a Bendix® Trailer Information Module™.

Recheck for any remaining DTCs and return the vehicle

to service.

B. Check if the wheel speed sensors ‘SC’ and

‘SD’ are swapped

This DTC is caused by the ECU comparing the

difference in wheel speed readings between the left

and right wheel speed sensors to cross‑check with the

on‑board lateral accelerometer. Reversed sensors can

cause a DTC to falsely trigger. Wheel speed sensors

‘SC’ and ‘SD’ locations are ECU‑orientation specic

(See Figure 1).

TABS

ADV

TABS

ADV

TABS

ADV

TABS

ADV

RIGHT - “CURB SIDE”

FIGURE 1 - BENDIX® TABS-6™ ADV MODULE ORIENTATION & WHEEL SPEED SENSOR LOCATIONS

LEFT - “ROAD SIDE”

©2013 Bendix Commercial Vehicle Systems LLC, a member of the Knorr‑Bremse Group. 10/13. All Rights Reserved.

Bulletin No: TCH-013-024 Effective Date: October 25, 2013 Cancels: N/A Page: 2 of 2

Make any needed changes, and then use the Bendix®

ACom® Diagnostics software to run the Bendix®

TABS‑6™ Advanced End‑of‑Line Test (EOL Test) and

recheck for any other remaining DTCs before returning

the vehicle to service.

C. If Sections A and/or B have not solved the

problem, update the ECU rmware

New versions of ECU firmware with improved

diagnostics may be available; contact your Bendix Tech

Team representative for available “update packages” at

1‑800‑AIR‑BRAKE (1‑800‑247‑2725), option 2. Where

one of the packages is available, the new rmware

can be downloaded to the ECU using Bendix ACom

Diagnostic software. Enable “update packages” in

Bendix ACom Diagnostic software and install at least

one update package on the PC.

Note: Bendix TABS‑6 Advanced update packages

are only able to be programmed into the ABS module

using the SAE J1939 interface. Contact your Bendix

representative to nd out more about update packages.

FIGURE 2 - TABS-6 ADVANCED SINGLE-CHANNEL

MODULE (TABS-6 ADV)

Background

The Bendix TABS‑6 Advanced module is an integrated single channel trailer ABS/TRSP

controller and modulator for air‑braked heavy‑duty trailers and semi‑trailers. The module

acts as a relay valve during normal braking, but during ABS events, it will intervene to

help improve lateral stability during braking. It can also autonomously apply brakes

when it detects a potential roll over condition. All modules include an Electronic Control

Unit (ECU) and Modulator Relay Valve which are integrated into a single self‑contained

2S/1M (two sensor, one modulator) trailer ABS/TRSP unit.

The TABS‑6 Advanced cross checks the on‑board lateral acceleration sensor reading

with a lateral acceleration calculated value based on vehicle track width, programmed

orientation and wheel speed sensor differences (left to right). If the two values do not

correspond to each other within predened limits the lateral Diagnostic Trouble Code

is set. Any of the items used to calculate lateral acceleration (speed sensor readings,

programmed track width and programmed orientation) if incorrect can cause a false

detection of this DTC.

Reference:

Service Data Sheet:

Bendix® TABS‑6 Advanced Trailer ABS Module SD‑13‑47671

Software:

Free downloads of Bendix ACom Diagnostic Software are available on www.bendix.com.

Alternatively, visit the Literature Center on www.bendix.com and order a CD (BW2329).