BENDIX BW1667 Manuel d'utilisateur

1®SD-13-4762Bendix® MC-12™ Modulator Controller AssemblyFIGURE 1 - MC-12™ MODULATOR CONTROLLER ASSY.wheel end send wheel speed information to the EC-1

10START HERESTATUS LAMP DOES NOT BLINK, COMESON AND REMAINS ILLUMINATEDYESNOSTATUS LAMP COMES ON, BLINKS ANDGOES OUT.THE SYSTEM IS FUNCTIONING NORMAL

11TroubleshootingSECTION ITRAILER STATUS LAMP TESTINGREPEAT THE “INITIALSTART-UP PROCEDURE”.START HEREUSING A JUMPER WIRE CONNECT PIN A TO D THEN BTO

12TroubleshootingSECTION IIINSPECTION FOR ILLUMINATED LED'sYESYESGO TO SECTION IV“TESTING FOR POWERTO THE EC-12™CONTROLLER”.NONOSTART HEREIS GRE

13TroubleshootingSECTION III INSPECTION FOR ILLUMINATED LEDSNOTE RED “CONT” LED INEC-12™ CONTROLLERDIAGNOSTICS WINDOW.START HERENOON?INSPECTING "

14TroubleshootingSECTION IVTESTING FOR POWER TO THE EC-12™ CONTROLLERTURN IGNITION OFF, DISCONNECT 14 PINWIRE HARNESS CONNECTOR FROM EC-12™CONTROLLER

15TroubleshootingSECTION VTESTING THE MODULATORSAME RED LED'sILLUMINATED?NOYESYESARE ANY RED LED'sILLUMINATED?INSPECT CONNECTOR AND RECONNEC

16TroubleshootingSECTION VI PART ATESTING THE WHEEL SPEED SENSORSTART HEREREPEAT THE "INITIAL START-UPPROCEDUREARE ANY RED LEDsILLUMINATED?GO TO

17TroubleshootingSECTION VI PART BTESTING THE WHEEL SPEED SENSORREPEAT THE “INITIALSTART-UP PROCEDURE”.REPLACE THE EC-12™CONTROLLERYESARE ANY LED&apos

18NOTES & REFERENCESMC-12™MODULATORCONTROLLERASSY.TRAILER SERVICE AIR LINESPEEDSENSOREXCITERRINGSPRINGBRAKEVOLT LED (red) High/Low VoltageMOD LED

19NOTES & REFERENCES

2FIGURE 2 - MC-12™ MODULATOR TRAILER SYSTEM WIRING SCHEMATICSeven Conductor Antilock Wire GaugePin (Wire Connector Wire Single/Connector No.) Letter C

BW1667 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 4/2004 Printed in U.S.A.

3System ground (pin 1 on the seven pin connector—white)enters the MC-12™ modulator at pin C.Each wheel speed sensor sends the MC-12™ modulator itsAC.

4BALANCED POSITION: Normal Service ApplicationThe modulator reaches a balanced position when controlpressure acting upon the top side of the piston ap

5FIGURE 6 - EXHAUSTING: NORMAL SERVICE APPLICATIONFIGURE 7 - ANTILOCK MODE: SOLENOIDS ACTIVATEDEXHAUSTSUPPLYEXHAUSTSOLENOIDCONTROLDOUBLECHECKTRAILERCO

6SERVICE CHECKSEnsure that all wiring and connectors are secure and freefrom visible damage. Although the MC-12™ modulatorassembly contains self check

7REMOVAL OF THE MC-12™ MODULATORASSEMBLY1. Remove and identify all air lines connected to the unit.2. Disconnect the 14 pin connector from the unit by

85. Inspect all air line fittings and plugs for corrosion. Cleanall old thread sealant from the pipe threads.Any component exhibiting a condition desc

9TROUBLESHOOTING INFORMATIONPREPARATION FOR TESTINGAll trailer antilock testing should be performed with a tractorconnected to the trailer.1. Connect