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Bendix

TABS-6

™

Standard and Premium Trailer ABS Modules

FIGURE 1 - BEndIx

TABS-6

™

STAndARd And PREmIUm mOdULES

INTRODUCTION

The Bendix

TABS-6

™

module is an integrated trailer ABS

controller and modulator for air-braked heavy-duty trailers, semi-
trailers and dollies. The module acts as a relay valve during
normal braking, but during ABS events, it will intervene to help
improve stability. All modules include an Electronic Control Unit
(ECU) and Modulator Relay Valve (MRV) which are integrated
into a single self-contained 2S/1M (two-sensor, one modulator)
trailer ABS unit. The

Premium Bendix TABS-6 module

is auto-

configurable to control more sensors and modulators (up to

4S/3M) from its default 2S/1M.

Bendix TABS-6 modules also feature:
• Internal electrical connections to the primary MRV,

eliminating the need for external pigtail harnesses.

• Optional mounting to the service reservoir or to the chassis,

without additional brackets.

• Blink code diagnostics and support for advanced diagnostic

tools.

• Support for Power Line Carrier (PLC) communication to the

towing vehicle.

• A pressure equalizing valve in the sealed ECU housing to

give improved protection from water, etc.

• A locking dust cover to provide additional electrical

connector and cable protection.

• A serviceable nylon filter to help prevent foreign material

from entering the control port.

TABLE OF CONTENTS

PAGE

  Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
  General Safety Guidelines  . . . . . . . . . . . . . . . . . . . .2
  Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Mounting Configurations

. . . . . . . . . . . . . . . . . . . . . .3

  PLC Communications. . . . . . . . . . . . . . . . . . . . . . . .3
  Wiring Harness (Pigtail)  . . . . . . . . . . . . . . . . . . . . 3-4
  Power and Ground . . . . . . . . . . . . . . . . . . . . . . . . . .4
  ABS Indicator Lamp  . . . . . . . . . . . . . . . . . . . . . . . . .5
  Wheel Speed Sensors  . . . . . . . . . . . . . . . . . . . . . 5-6
  Bendix

BR9235

™

ABS Modulator Valves. . . . . . . . .6

  J1708/J1587 Diagnostic Link  . . . . . . . . . . . . . . . . . .7
  Auxiliary I/O  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
  Bendix

Flex

™

ABS Program . . . . . . . . . . . . . . . . . .7

  Customer Scratch Pad . . . . . . . . . . . . . . . . . . . . . . .7
  Power-up Sequence . . . . . . . . . . . . . . . . . . . . . . . 7-8
  ABS Operation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Auto-Configuration

. . . . . . . . . . . . . . . . . . . . . . . . . .8

  Odometer Function. . . . . . . . . . . . . . . . . . . . . . . . . .8
  Non-standard Tire Size. . . . . . . . . . . . . . . . . . . . . . .9
  Diagnostic Trouble Code Detection  . . . . . . . . . . . . .9
  Partial ABS Shutdown. . . . . . . . . . . . . . . . . . . . . . .10
  Blink Code Diagnostics. . . . . . . . . . . . . . . . . . . . . .10
  Diagnostic Trouble Codes (DTCs)  . . . . . . . . . . 11-13
  Using Hand-Held or PC-Based Diagnostics . . . . . .14
  Bendix ABS Diagnostic Tools  . . . . . . . . . . . . . . 14-15
  Contacting Bendix. . . . . . . . . . . . . . . . . . . . . . . . . .15
  Servicing the Bendix TABS-6 Module. . . . . . . . . . .16
  Service Replacement of Other ABS Controllers . . .16
  Leakage and Operational Tests  . . . . . . . . . . . . . . .17
  ABS Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
  Troubleshooting  . . . . . . . . . . . . . . . . . . . . . . . . 19-32

3/4" NPT

Supply Port

Through-holes

for Frame

(Chassis)

Mounting

Wheel Speed

Sensor

Connectors

ECU Pin-out Label

(See Page 33)

Electronic