1®SD-13-4788DESCRIPTIONGENERALThe EC-17™ is an electronic antilock controller. It is the basecomponent in a family of full vehicle wheel control antil

109. Components with stripped threads or damagedparts should be replaced rather than repaired. Donot attempt repairs requiring machining or weldingun

11Separate dash lamps, controlled by the EC-17™/EC-17N™controller, advise the driver of the condition of the entireantilock/traction system.When the c

12in this manual can be used. When connected to a PC, usethe instructions and documentation packaged with the DCIto troubleshoot or reconfigure the E

13"RER" (Rear) LEDThis Red LED illuminates in order to indicate the location of acomponent or its wiring. It will light in conjunction with

14connected. If mid axle speed sensors are notdetected, the EC-17™ controller will default to a foursensor configuration. (Two front and two rear)B. E

15being configured with traction control (either torquelimiting, differential braking or both), the traction controlcondition dash lamp, will be illum

16MODRESETFRTRERMIDRHTLFTTRCSENECUVLTMODRESETFRTRERMIDRHTLFTTRCSENECUVLTMODRESETFRTRERMIDRHTLFTTRCSENECUVLTMODRESETFRTRERMIDRHTLFTTRCSENECUVLTMODRESET

17TURN IGNITION ON ANDOBSERVE DASH ANTILOCKLAMP.DID ANTILOCK DASH LAMP BLINK?IS ANTILOCK DASH LAMPSTILL ILLUMINATED?YESYESGO TO SECTION III“INSPECTIO

18SECTION I - ANTILOCK DASH LAMP TESTINGYESNOCHECK WIRING HARNESS AND RELAY FORSHORTS TO GROUND. RECONNECT ANDCHECK/REPLACE THE FOLLOWING:1. DASH LIG

19MODRESETFRTRERMIDRHTLFTTRCSENECUVLTSECTION II - INSPECTION FOR ILLUMINATED LEDsCHECK CLOSELY ANDNOTE IF GREEN, VLTLED IS ILLUMINATEDNO (OFF)YESNOYES

2FIGURE 2 - EC-17™ ANTILOCK TRACTION CONTROLLER SYSTEM SCHEMATICTRACTION ENABLE SWITCHANTILOCK LAMPRETARDER DISABLE SWITCHBATTERYENGINEELECTRONICCONTR

20SECTION III - INSPECTION FOR ILLUMINATED LEDsIS GREEN LED FLASHING?YESNOYESGO TO SECTION IX “TESTING FORFALSE FAILURE INDICATION - CAUSEDBY WHEEL

21MODRESETFRTRERMIDRHTLFTTRCSENECUVLTMODRESETFRTRERMIDRHTLFTTRCSENECUVLTSECTION IV - INSPECTION FOR ILLUMINATED LEDsTHERE SHOULD BE A MINIMUM OFTHREE

22SECTION V - TESTING FOR POWER TO THE EC-17™ CONTROLLERVOLTAGE SAME AS BATTERYVOLTAGE. MUST BEBETWEEN 11 AND 17 VOLTS.NOYESRECONNECT CONNECTOR TO E

23SECTION VI A - TESTING THE MODULATORF E D C B A123K J H G F E D C B AH1 LEFT FRONT MOD. COMMONF1 LEFT FRONT MOD. EXHAUSTG1 LEFT FRONT MOD. HOLDC1 RI

24SECTION VI B - TESTING THE MODULATORGO TO MODULATOR, INSPECT WIRING CONNECTOR.DISCONNECT CONNECTOR AND TEST RESISTANCEBETWEEN PINS ON MODULATOR. R

25SECTION VII A - TESTING THE WHEEL SPEED SENSORSTART HEREIGNITION ON, NOTE ILLUMINATED LED's.RESET WITH A MAGNET, NOTE REACTION OF RED LEDs.2nd

26SECTION VII B - TESTING THE WHEEL SPEED SENSORSTART HERE FROMSECTION VII AGO TO SECTION III "INSPECTIONFOR ILLUMINATED LEDs"SAME LEDs IL

27SECTION VIII - TESTING FOR FALSE INDICATION CAUSED BY DASH LIGHT RELAYIS THE ABS INDICATORLAMP ILLUMINATED?NOYESYESCHECK THE DASH AND VEHICLEWIRING.

28MODRESETFRTRERMIDRHTLFTTRCSENECUVLTSECTION IX - TESTING FOR FALSE INDICATION CAUSED BY WHEEL SPEED COMPONENTSSTART HERENOYESRUN VEHICLE AT 7 MPH OR

29SECTION X - TESTING TRACTION CONTROL DASH LAMPNOYESREPLACE EC-17™CONTROLLERYESNO123C2K J H G F E D C B AREPAIR OR REPLACE WIREHARNESS AND RETESTVEHI

3When programmed to provide traction control in addition toantilock, the following components are added: - One traction solenoid (incorporated into t

30MODRESETFRTRERMIDRHTLFTTRCSENECUVLTSECTION XI - TESTING TRACTION CONTROL MODULATORARE "TRC" AND "MOD"LEDs ON?START HEREThese LED

31MODRESETFRTRERMIDRHTLFTTRCSENECUVLTSECTION XII - TESTING ENGINE CONTROL MODULE WIRE HARNESSTRC ONLY RED LED ON?PASS MAGNET OVER EC-17™CONTROLLER RES

32BW1910 © 2004 Bendix Commercial Vehicle Systems LLC All rights reserved. 5/2004 Printed in U.S.A.

4FIGURE 5 - EC-17™ ANTILOCK TRACTION CONTROLLER SYSTEM WIRING SCHEMATICNote: M-21™ and M-22™ modulatorsare shown in the diagrams in thisdocument — new

5axles (6 x 4) requires 4 speed sensors for antilock onlyoperation, but have the option to use 6 speed sensors forenhanced performance of both antiloc

6If the EC-17™ controller is programmed for traction control,it contains the following outputs:- A connection to the engine's electronic control

7modulators. Because the modulators are controlled by theEC-17™ controller, the solenoid valves in the appropriatemodulator are opened and closed to g

8AUTO CALIBRATIONFor optional ATC performance the ECU utilizes a featurereferred to as auto calibration. Auto calibration allows theECU to compensate

9ANTILOCK AND TRACTION WIRINGGENERAL NOTESThe wires that carry information and power into and out ofthe EC-17™ controller are generally grouped and te