
CONFIDENTIAL
Bendix Commercial Vehicle Systems LLC
Elyria, OH 44036
PRODUCT SPECIFICATION - BW-283-PR
SPEC. BW-283-PR
73 SHEETS
SHEET NO. 2
Table of Contents
1 SCOPE ................................................................................................................................................................. 7
1.1 D
ESCRIPTION ................................................................................................................................................. 7
1.2 S
PECIFICATIONS............................................................................................................................................. 7
1.2.1 Bendix Commercial Vehicle Systems Specifications ............................................................................. 7
1.2.2 SAE Documents..................................................................................................................................... 7
1.2.3 Government Documents ........................................................................................................................ 8
1.2.4 Standards .............................................................................................................................................. 8
1.2.5 Abbreviations and Symbols ................................................................................................................... 8
2 GENERAL PRODUCT DESCRIPTION.......................................................................................................... 9
2.1 T
RAILER ANTILOCK BRAKING SYSTEM (TABS)............................................................................................ 9
2.2 ABS
CONTROL MODES.................................................................................................................................. 9
2.3 ABS
VEHICLE INSTALLATION SCHEMATIC .................................................................................................. 10
3 SYSTEM COMPONENTS............................................................................................................................... 11
3.1 TABS6
TRAILER ABS MODULE .................................................................................................................. 11
3.1.1 Modulator Relay Valve (MRV) Crack Pressure.................................................................................. 13
3.1.2 Control Line Filter .............................................................................................................................. 13
3.1.3 FMVSS 121 Timing ............................................................................................................................. 13
3.1.4 ECU Identification & Connector Pin-Out........................................................................................... 13
3.1.5 ECU Power Circuit............................................................................................................................. 15
3.1.6 Communication Data Links................................................................................................................. 15
3.1.7 ECU Speed Sensor Input Circuits ....................................................................................................... 16
3.1.8 ABS Warning Light Circuit ................................................................................................................. 16
3.1.9 Auxiliary Inputs & Outputs (I/O) ........................................................................................................ 17
3.1.10 Power-Up Sequence (functions).......................................................................................................... 18
3.1.11 Auto-Configuration (Premium TABS6 only) ....................................................................................... 18
3.1.12 Auxiliary Design Language (ADL)...................................................................................................... 19
3.1.13 Customer Scratch Pad......................................................................................................................... 19
3.1.14 Odometer Functions............................................................................................................................ 20
3.1.15 System Schematic Diagrams ............................................................................................................... 20
3.2 TABS6
TRAILER ABS WIRE HARNESSES .................................................................................................... 23
3.3 WS-24
WHEEL SPEED SENSOR (WSS)......................................................................................................... 24
3.3.1 WS-24 WSS Specifications .................................................................................................................. 25
3.4 BR9235
MODULATOR RELAY VALVE (MRV) ............................................................................................ 26
3.4.1 BR9235 MRV Specifications ............................................................................................................... 26
4 TABS6 OPERATING CONDITIONS ............................................................................................................ 28
4.1 E
LECTRICAL................................................................................................................................................. 28
4.1.1 Power Requirements ........................................................................................................................... 28
4.1.2 Steady State Operation........................................................................................................................ 28
4.1.3 ECU Housing Degree of Protection.................................................................................................... 28
4.1.4 Load Dump.......................................................................................................................................... 28
4.1.5 Inductive Switching ............................................................................................................................. 29
4.1.6 Mutual Coupling ................................................................................................................................. 29
4.1.7 Power Line Noise ................................................................................................................................ 29
4.1.8 Over-Voltage During Jump Start ........................................................................................................ 29
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