BENDIX TABS-6 Service Data

®
Bendix TABS-6
®
Electronic
Control Unit
(ECU) Cover
(Sealed)
Integrated
Modulator
Relay Valve
3/4" NPT
Supply Port
Four (4) 3/8" NPT
Delivery Ports
(To Brake Chambers)
FIGURE 1 - BEndIx TABS-6
®

INTRODUCTION

The Bendix TABS-6
® ™
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.
Standard and Premium Trailer ABS Modules
™
3/8" NPT Control
Port with
Integral Filter
ECU Connector
(Removable)
Through-holes
for Frame
(Chassis)
Mounting
Part Number
Label
(See Page 33)
STAndARd And PREmIUm mOdULES
™
module is an integrated trailer ABS
ECU Pin-out Label
(See Page 33)
Cover
Wheel Speed
Sensor
Connectors
To Remove Cover Slide
Lock Tab

TABLE OF CONTENTS

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
J1708/J1587 Diagnostic Link . . . . . . . . . . . . . . . . . .7
Auxiliary I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Bendix
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
The ECU Connector
Varies for Standard and
Premium - See Chart
The Standard TABS-6
five (5)-Pin Connector
The Premium TABS-6
BR9235 ABS Modulator Valves. . . . . . . . . 6
® ™
Flex ABS Program . . . . . . . . . . . . . . . . . .7
® ™
Module uses a
Module uses an
18-Pin Connector
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