BENDIX EC-16 ANTILOCK CONTROLLER, Manual

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BENDIX EC-16 ANTILOCK CONTROLLER Manual Download Page 2

2

TRACTION ENABLE SWITCH

ANTILOCK LAMP

RETARDER DISABLE SWITCH

BATTERY

ENGINE ELECTRONIC

CONTROL MODULE

M-21

™

OR M-22

™

MODULATORS

QUICK

RELEASE

VALVE

SERVICE BRAKE

VALVE

EC-16

™

CONTROLLER

AT-1

™

OR AT-2

™

ANTILOCK

TRACTION ASSEMBLY

M-21

™

OR M-22

™

MODULATORS

TANDEM REAR AXLE

WHEEL SPEED

SENSOR

EXCITER

WHEEL SPEED

SENSOR

EXCITER

REAR AXLE SERVICE &

SPRING BRAKES

DIAGNOSTIC

COMPUTER

TRACTION LAMP

FIGURE 2 - EC-16

™

CONTROLLER SYSTEM SCHEMATIC

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Summary of Contents for EC-16 ANTILOCK CONTROLLER

Page 1: ...tem helps improve vehicle traction during acceleration in adverse road conditions Integrated with antilock logic traction control monitors wheel speed information from the sensors during acceleration...

Page 2: ...22 MODULATORS QUICK RELEASE VALVE SERVICE BRAKE VALVE EC 16 CONTROLLER AT 1 OR AT 2 ANTILOCK TRACTION ASSEMBLY M 21 OR M 22 MODULATORS TANDEM REAR AXLE WHEEL SPEED SENSOR EXCITER WHEEL SPEED SENSOR EX...

Page 3: ...ntrol feature The 2 pin connector is linked to a traction solenoid which is located in the upper portion of the antilock traction relay valve assembly See Figure 3 MOUNTING The EC 16 controller is ava...

Page 4: ...3 ENGINE CONTROL SERIAL B C1 RIGHT FRONT MOD COMMON C2 TRACTION LAMP C3 AUXILIARY OUTPUT D1 RIGHT FRONT MOD HOLD D2 NOT USED D3 NOT USED E1 RIGHT FRONT MOD EXHAUST E2 NOT USED E3 WARNING LAMP F1 LEFT...

Page 5: ...s and the air brake system The EC 16 controller is able to simultaneously and independently control four individual modulator assemblies An antilock dash light and its electrical relay are connected t...

Page 6: ...OCK BRAKE APPLICATION During normal braking air pressure from the brake valve enters the control port of the service relay valve The service relay delivers air to and through the antilock modulator lo...

Page 7: ...sed the vehicle must be equipped with an electronically controlled engine throttle The torque limiting feature allows the EC 16 controller to reduce engine torque to a suitable level for the available...

Page 8: ...ATING YES NO Std ABS Front ABS Rear Traction Braking Left Right Left Right RF Sensor YES YES YES YES NO YES LF Sensor YES YES YES YES NO YES RM Sensor YES YES YES YES NO YES LM Sensor YES YES YES YES...

Page 9: ...rstand the recommended procedures Useonlythepropertoolsandobserve all precautions pertaining to use of those tools 4 If the work is being performed on the vehicle s air brake system or any auxiliary p...

Page 10: ...ins self test and diagnostic circuitry that continuously checks for proper operation of the entire antilock traction system including wiring continuity The EC 16 controller is programmed at the factor...

Page 11: ...hes ON to indicate a permanent or intermittent open or short circuit in the solenoids of one of the four M 21 modulators or the wiring connecting them to the system When indicating a problem with an M...

Page 12: ...ng is active if not then the display will go to the condition described in 6 No other LEDs will be on 6 The diagnostic display will return to its normal operational status Assuming no problems exist i...

Page 13: ...control differential braking 2 If the vehicle is to be configured with traction control it must have a traction control dash lamp and a traction control enable disable switch Both the lamp and switch...

Page 14: ...LL TROUBLESHOOTING BEGINS BY OBSERVING THE ANTILOCKAND TRACTION CONDITION LAMPS ON THE DASH All troubleshooting should begin by first performing the Initial Start Up Procedure and following the direct...

Page 15: ...ROUPON ONEFROMTHIS GROUPON NOTHINGON GO TOSECTIONV FLASHING GO TO SECTIONV ON NOT FLASHING GO TOSECTIONII DIAGNOSTIC DISPLAY QUICK REFERENCE This index is presented for the benefit of personnel experi...

Page 16: ...SENABLED USETHE UNDERDASHSWITCH RETEST 0 DIDTRACTIONCONTROL LAMPBLINKTHENGO OUT YES ISTRACTIONDASH LAMPILLUMINATED GOTOSECTIONXI TESTINGTRACTION CONTROLMODULATOR YES NO GOTOSECTIONX TESTING THETRACTIO...

Page 17: ...LAMP RELAY A3 GROUND A1 GROUND A2 GROUND REPAIRORREPLACEWIRE HARNESS REPLACERELAY RETESTFORBATTERY VOLTAGE SECONDTIMETO THISPOINT ISVOLTAGECORRECT REPEATTHE INITIAL START UPPROCEDURE WITHIGNITION ON M...

Page 18: ...PECTEC 16 CONTROLLERFOR PRESENCEOFILLUMINATED LEDsANDRECORD STARTHERE ARE ANY RED LEDs ILLUMINATED ISGREENLEDFLASHING EC 16 CONTROLLER DIAGNOSTIC DISPLAY GREEN VLT LED RED LEDs REPLACETHEEC 16 CONTROL...

Page 19: ...NTROLLERFOR PRESENCEOFILLUMINATEDLEDSANDRECORD STARTHERE GOTOSECTIONIV INSPECTION FORILLUMINATEDLEDs EC 16 CONTROLLER DIAGNOSTIC DISPLAY GOTOSECTIONV TESTINGFORPOWER TOTHEEC 16 CONTROLLER ISGREENVOLTL...

Page 20: ...IONINGLEDs RIGHT LEFTFRONT REAR GOTO SECTION VIA TESTINGTHE MODULATOR ANDTESTTHE APPROPRIATEMODULATOR YES USING THETWOPOSITIONINGLEDs RIGHT LEFTFRONT REAR GOTO SECTION VIIA TESTINGTHEWHEEL SPEEDSENSOR...

Page 21: ...RCONTINUITY REFERTO THEVEHICLESERVICEMANUALAND CHECKTHEBATTERYVOLTAGE REPAIRORREPLACEWIRINGAS NECESSARYAND RETEST REPEATTHE INITIALSTART UP PROCEDURE STARTHERE TURNIGNITIONOFF DISCONNECT30PIN CONNECTO...

Page 22: ...REAR MOD EXHAUST E1 LEFT REAR MOD HOLD A1 RIGHT REAR MOD COMMON C1 RIGHT REAR MOD EXHAUST B1 RIGHT REAR MOD HOLD 1 2 3 REPLACETHEEC 16 CONTROLLER GO TO SECTION IV INSPECTIONFOR ILLUMINATEDLEDs ANDRET...

Page 23: ...TESTEACHPINTOVEHICLEGROUNDANDNOTENO CONTINUITY REPLACETHEMODULATOR YES REPEATTHE INITIAL START UPPROCEDURE REPAIRORREPLACE MODU LATORWIREHARNESS GOTO SECTIONIV INSPECTIONFOR ILLUMINATEDLEDs ANDRETEST...

Page 24: ...NITIONOFFANDCHECKFOLLOWING A CHECK GAP BETWEENSPEEDSENSORANDEXCITERORTONE RING GAPFORBENDIX WS 20 SPEEDSENDERISBETWEEN0 015 INCHES IFSENSORGAPMUSTBEADJUSTED CHECKFORLOOSEOR WORNWHEELBEARINGSBEFORERE G...

Page 25: ...NITIONOFF REMOVECONNECTORFROMEC 16 CONTROLLER MEASURERESISTANCEBETWEENTHE APPROPRIATESPEEDSIGNAL ANDSIGNALRETURN RESISTANCEFORBENDIX WS 20 SENSORISBETWEEN 1500 2500OHMS REFERTO VEHICLEMANUALFORTHE RES...

Page 26: ...N CONNECTORTOTHEEC 16 CONTROLLER TURNIGNITIONON ANDCHECKFORVEHICLEPOWER AT THE LAMP RELAY COIL YES NO ISPOWERDETECTED REPLACETHERELAYAND REPEAT INITIALSTART UP PROCEDURE IS DASH LAMP ON SECONDTIME TOT...

Page 27: ...HEIGNITIONOFFANDINSPECT APPROPRIATEAXLEANDWHEELFOR PRESENCEOFANEXCITERORTONERING ANDSPEEDSENSOR CHECKSENSOR GAP DISTANCEBETWEENSPEED SENSORANDEXCITERRING AND BEARING END PLAY RE ADJUST AS NECESSARY WI...

Page 28: ...B A REPAIRORREPLACEWIRE HARNESSANDRETEST VEHICLEVOLTAGE DETECTED WITHIGNITIONOFF REMOVE30PIN CONNECTORFROMEC 16 CONTROLLER TURNIGNITIONONAND CHECKFORVEHICLEVOLTAGEAT TERMINALC2 REPLACETRACTIONDASHLAM...

Page 29: ...NON PASSMAGNET OVEREC 16 CONTROLLER RESET REPEAT INITIALSTART UP PROCEDURE YES RESISTANCECORRECT NO CONTINUITYTOGROUND D3 D2 DISCONNECT2PINCONNECTORATMODULATOR CHECKRESISTANCEOFCONNECTORHALFATTACHED T...

Page 30: ...OLMODULE REPAIRORREPLACE VEHICLEWIREHARNESS STARTHERE NO YES NO YES WIRECONTINUITYOK 30PINCONNECTOR B3 B2 1 2 3 K J H G F E D C B A CONNECTORATENGINE ELECTRONICCONTROL MODULE CHECKWIRECONTINUITYBETWEE...

Page 31: ...31...

Page 32: ...32 BW1726 2004 Bendix Commercial Vehicle Systems LLC All rights reserved 6 2004 Printed in U S A...

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