CALL 800-631-5708
Revised 4-98
· 2S/1M (Basic and Standard), 2S/2M, 4S/2M and 4S/3M Systems
MERITOR WABCO
Table of Contents! Asbestos and Non-Asbestos Fiber Warnings
ii Section 1: Introduction Section 2: System ComponentsSection 3: ABS Questions and Answers
The Electronic Control Unit (ECU)
The ABS Warning Lamp Types of FaultsSection 4: System Configurations
2S/1M Trailer ABS Configuration Installation Diagrams
2S/2M Trailer ABS Configuration Installation Diagram 4S/2M Trailer ABS Configuration Installation Diagrams 4S/3M Trailer ABS Configuration Installation Diagram Power Cable Wiring DiagramsSection 5: Diagnostics
Blink Code Diagnostics Diagnostic Tools For ECUs with External Diagnostic Connectors Normal Mode Diagnostics Repair Existing FaultsSection 6: Component Replacement
ABS Relay Valve The ECU/Valve Assembly How to Install the Blink Code Diagnostic Tool into the SAE J1587 Diagnostic ConnectorSection 7: Sensor Adjustment & Component Testing
How to Test Wheel Speed Sensors 31
Sensor Test Procedure 31 Sensor Output Voltage Test 31 Check ABS Functions 31 ABS External Modulator Valve 31Final Test Before Returning a Trailer to Service:
For ECU/Valve Assembly
Part Number 472 500 011 0
(without external diagnostic connector) 32 S 472 500 013 0 (Units with External Diagnostic Connector) 34
Section 8: Appendixes
Appendix A: Expert Mode Diagnostics 37
Appendix B: Reconfigure Mode 40 Appendix C: Warning Lamp Diagnostics 42MERITOR WABCO
Easy-Stop™ Trailer ABSMaintenance Manual No. 33
Revised 4-98
· 2S/1M (Basic and Standard), 2S/2M, 4S/2M and 4S/3M Systems
Service Notes
____________________MERITOR WABCO ____________________MERITOR WABCO ____________________MERITOR WABCOImportant Information
This manual contains maintenance procedures for Meritor WABCO's Easy-stop™ Trailer Anti-Lock Braking System (ABS). The information contained in this manual was current at time of publication and is subject to change without notice or liability.
You must follow company procedures and understand all procedures and instructions before you begin to service or repair a unit. Some procedures require the use of special tools for safe and correct service. Failure to use special tools when required can cause serious personal injury to service personnel, as well as damage equipment and components.
Meritor WABCO uses the following notations to warn the user of possible safety issues and to provide information that will prevent damage to equipment and components.
|
! WARNING A WARNING indicates that you must follow a procedure exactly. Otherwise, serious personal injury can occur.
! CAUTION A CAUTION indicates that you must follow a procedure exactly. Otherwise, damage to equipment or components can occur. Serious personal injury can also result, in addition to damaged or malfunctioning equipment or components. |
NOTE A NOTE indicates an operation, procedure or instruction that is important for proper service. A NOTE can also supply information that can help to make service quicker and easier. T TORQUEThis symbol indicates that you must tighten fasteners to a specific torque value. |
Also Available from Meritor WABCO
Training Videos
· ABS for Trucks, Tractors and Trailers (VIDEO-T-9739V). $20.
· What Every Driver Should Know About ABS (VIDEO-T-96159V). $20.
· Truck, Tractor and Bus ABS Blink Code Diagnostics (VIDEO-T-9501V). $20.
 | Trailer ABS Diagnostics (VIDEO-T-9813V). $20. |
ABS Tips (Available at no charge)
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| Driver Tips (SP-93161).* |
· How to Brake with ABS audio cassette (SP-94126).*
· Driver Tips for Trailer ABS Warning Lamps (TP-97132).
· Service Tips for Trailer ABS Warning Lamp (TP-97133)
· Trailer ABS Service and Support Reference Card (TP-9803)
· Trailer ABS Technical Service Support Reference Card (TP-9804)
* For Spanish version, add SP to the item number. For French version, add FR to the item number.
How to Order
Order items from Meritor Literature Distribution Center, c/o Vispac, Inc., 35000 Industrial Road, Livonia, Ml 48150. For videos, include a purchase order or check (payable to Meritor Automotive) for $20 for each video. Phone orders are also accepted at 248-435-8689