BENDIX EC-17 ANTILOCK TRACTION CONTROL Manual
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BENDIX EC-17 ANTILOCK TRACTION CONTROL, 2 FIGURE 2 - EC-17 ™ ANTILOCK TRACTION CONTROLLER SYSTEM SCHEMATIC 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-17 ™ 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
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 16 MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT GO TO SECTION IV ON (NOT FLASHING) ONE OR MORE ON ONE FROM THIS GROUP ON ONE FROM THIS GROUP ON ON - GO TO SECTION VI A ON - GO TO SECTION VII A ONE FROM THIS GRO
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 23 SECTION VI A - TESTING THE MODULATOR F E D C B A 1 2 3 K J H G F E D C B A H1 LEFT FRONT MOD. COMMON F1 LEFT FRONT MOD. EXHAUST G1 LEFT FRONT MOD. HOLD C1 RIGHT FRONT MOD. COMMON E1 RIGHT FRONT MOD. EXHAUST D1 RIGHT FRONT MOD. HOLD F1 LEFT REAR MOD. COMMON D1 LEFT 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 18 PIN CONNECTOR 30 PIN CONNECTOR TURN IGNITION OFF. REFER TO ILLUSTRATION, DISCONNECT WIRE HARNESS CONNECTOR FROM EC-17 ™ CONT
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 8 AUTO CALIBRATION For optional ATC performance the ECU utilizes a feature referred to as auto calibration. Auto calibration allows the ECU to compensate for various tire sizes throughout the life of the vehicle. As there are many conditions that can result in the appearance of a change in the tire size, several items must be satisfied before the auto calibration feature is active. The auto calibration feature would automatically change the ECUs imbedded tire sizes if the difference exceeded approximately 8%. If issues occur with your ATC due to tire size changes please
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 13 "RER" (Rear) LED This Red LED illuminates in order to indicate the location of a component or its wiring. It will light in conjunction with either the RIGHT or LEFT LED and the MOD or SENS LED. "RHT" (Right) LED This Red LED illuminates in order to indicate the location of a component or its wiring. It will light in conjunction with either the FRONT or REAR LED and the MOD or SENS LED. "LFT" (Left) LED This Red LED illuminates in order to indicate the location of a component or its wiring. It will light in c
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 25 SECTION VII A - TESTING THE WHEEL SPEED SENSOR START HERE IGNITION ON, NOTE ILLUMINATED LED's. RESET WITH A MAGNET, NOTE REACTION OF RED LEDs. 2nd TIME TO THIS POINT DURING TESTING? GO TO SECTION VII PART B AND BEGIN TESTING YES ANY RED LEDs ON? SAME RED LEDs ON? YES NO GO TO SECTION VII PART B AND BEGIN TESTING NO NO YES GO TO SECTION IV. RECONNECT CONNECTORS AT EC-17 ™ CONTROLLER AND SPEED SENSOR, DO MAGNETIC RESET. NOTE RED LEDs. GO TO "INITIAL START-UP PROCEDURE" YES ARE ANY RED LEDs IL
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 12 in this manual can be used. When connected to a PC, use the instructions and documentation packaged with the DCI to troubleshoot or reconfigure the EC-17 ™ /EC-17N ™ controller. For more information on the Bendix Diagnostic Communication Interface, see your local authorized Bendix parts outlet or call 1-800-AIR-BRAKE (1-800-247-2725). OPTIONAL DIAGNOSTIC LEDS & RESET The condition of specific components is provided by a series of labeled, light emitting diodes (LEDs) in the EC-17 ™ controller housing. No special t
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 29 SECTION X - TESTING TRACTION CONTROL DASH LAMP NO YES REPLACE EC-17 ™ CONTROLLER YES NO 1 2 3 C2 K J H G F E D C B A REPAIR OR REPLACE WIRE HARNESS AND RETEST VEHICLE VOLTAGE DETECTED? WITH IGNITION OFF, REMOVE 30 PIN CONNECTOR FROM EC-17 ™ CONTROLLER. TURN IGNITION ON AND CHECK FOR VEHICLE VOLTAGE AT TERMINAL C2. REPLACE TRACTION DASH LAMP WITH KNOWN GOOD UNIT. REPEAT "INITIAL START-UP PROCEDURE" 30 PIN CONNECTOR IS THIS THE SECOND TIME TO THIS POINT? START HERE VEHICLE OR ECU BUILT AFTER mid-year
27 SECTION VIII - TESTING FOR FALSE INDICATION CAUSED BY DASH LIGHT RELAY IS THE ABS INDICATOR LAMP ILLUMINATED? NO YES YES CHECK THE DASH AND VEHICLE WIRING. CHECK FOR CONTINUITY BETWEEN PIN E3 AND THE ABS RELAY TERMINATION. REPAIR OR REPLACE THE WIRE HARNESS. CHECK FOR THE PRESENCE OF THE ABS INDICATOR LAMP RELAY. REPEAT THE INITIAL START UP PROCEDURE. START HERE ARE A
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 14 connected. If mid axle speed sensors are not detected, the EC-17 ™ controller will default to a four sensor configuration. (Two front and two rear) B. Electronic Engine Control: On units manufactured prior to mid-year 2000, if the EC-17 ™ controller is connected to the control module of an electronic engine, the torque limiting and differential braking feature of ATC will be activated when the traction enable/disable switch is toggled prior to self configuration. After mid-year 2000, the electronic engine must transmit the throttle position via the J1922 or J1939 serial link for ATC to be activated during wheel spin. C. Antilock Traction Relay Valve: If the solenoid a
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 3 When programmed to provide traction control in addition to antilock, the following components are added: - One traction solenoid (incorporated into the relay valve) - One dash mounted traction condition lamp - Serial connection to engine control module (for vehicles programmed for torque limiting feature) - Traction disable wiring and switch PHYSICAL The EC-17 ™ controller electronics are contained in a non- metallic housing and are environmentally protected by an epoxy compound. The design of the digital electronics are intended to
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 1 ® SD-13-4788 DESCRIPTION GENERAL The EC-17 ™ is an electronic antilock controller. It is the base component in a family of full vehicle wheel control antilock systems for buses, trucks and truck tractors. In addition to the antilock function, the EC-17 ™ controller can be assembled and programmed to provide an optional traction control feature. Figure 1 shows the basic EC-17 ™ /EC-17N ™ controller configurations. Designed to minimize the potential of brake lock up on all wheels during aggressive braking, the EC-17 ™ controller based antilock system provides the vehi
31 MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT SECTION XII - TESTING ENGINE CONTROL MODULE WIRE HARNESS TRC ONLY RED LED ON? PASS MAGNET OVER EC-17 ™ CONTROLLER RESET & REPEAT "INITIAL START-UP PROCEDURE" TURN IGNITION OFF. DISCONNECT 30 PIN CONNECTOR FROM EC-17 ™ CONTROLLER & 2 or 3 PIN CONNECTOR AT ENGINE ELECTRONIC CONTROL MODULE. REPAIR OR REPLACE VEHICLE WIRE H
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 24 SECTION VI B - TESTING THE MODULATOR GO TO MODULATOR, INSPECT WIRING CONNECTOR. DISCONNECT CONNECTOR AND TEST RESISTANCE BETWEEN PINS ON MODULATOR. RESISTANCE VALUES FOR BENDIX ® M-21 ™ AND M-22 ™ MODULATORS. HOLD TO COMMON: READ 3.5 TO 5 OHMS EXHAUST TO COMMON: READ 3.5 TO 5 OHMS EXHAUST TO HOLD: READ 7 TO 10 OHMS RESISTANCE VALUES FOR BENDIX ® M-32 ™ MODULATORS. HOLD TO COMMON: READ 4.9 TO 7 OHMS EXHAUST TO COMMON: READ 4.9 TO 7 OHMS EXHAUST TO HOLD: READ 9.8 TO 14 OHMS TEST EACH PIN TO VEHICLE GROUND WITH A MEG- OHMMETER AND NOTE THAT NO CONTINUITY EXISTS. EXHAUST COMMON HOLD ABC CONNECTOR ON M-21 ™ OR M-22 ™ MODULATOR. START HERE FROM SECTION VI A REPLACE TH
26 SECTION VII B - TESTING THE WHEEL SPEED SENSOR START HERE FROM SECTION VII A GO TO SECTION III "INSPECTION FOR ILLUMINATED LEDs" SAME LEDs ILLUMINATED? NO ARE ANY LEDs ILLUMINATED? NO YES ARE SAME RED LEDs ILLUMINATED ? YES NO YES REPLACE THE EC-17 ™ CONTROLLER. REPAIR OR REPLACE SPEED SENSOR WIRING HARNESS 1 2 3 J2 LEFT FRONT W. S. RTN J1 L
11 Separate dash lamps, controlled by the EC-17 ™ /EC-17N ™ controller, advise the driver of the condition of the entire antilock/traction system. When the controller senses an erroneous condition, it stores the condition in memory, illuminates the dash mounted condition lamp and after certain criteria are met it disables the antilock or traction control function. If
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 15 being configured with traction control (either torque limiting, differential braking or both), the traction control condition dash lamp, will be illuminated as well as the appropriate LEDs on the EC-17 ™ controller diagnostic display. The traction control dash lamp will be illuminated until the traction control enable/disable switch is placed in the traction control enabled position (traction control operative). 4. Place the traction control enable/disable switch in the traction control enabled position (
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 19 MOD RESET FRT RER MID RHT LFT TRC SEN ECU VLT SECTION II - INSPECTION FOR ILLUMINATED LEDs CHECK CLOSELY AND NOTE IF GREEN, VLT LED IS ILLUMINATED NO (OFF) YES NO YES (ON) GO TO SECTION V “TESTING FOR POWER TO THE EC-17 ™ CONTROLLER” YES ARE ANY RED LEDs ILLUMINATED? NO YES NO INSPECT EC-17 ™ CONTROLLER FOR PRESENCE OF ILLUMINATED LEDS AND RECORD START HERE ARE ANY RED LEDs ILLUMINATED? IS GREEN LED FLASHING? EC-17 ™ CONTROLLER DIAGNOSTIC DISPLAY GREEN VLT LED RED LEDs REPLACE THE EC-17 ™ CONTROLLER GO TO SECTION V “TESTING FOR POWER TO THE EC-17 ™ CONTROLLER”. NOTE AND RECORD THE
BENDIX EC-17 ANTILOCK TRACTION CONTROL, 7 modulators. Because the modulators are controlled by the EC-17 ™ controller, the solenoid valves in the appropriate modulator are opened and closed to gently pump the brake on the spinning wheel only. This gentle brake application forces the differential to drive the stationary or slowly spinning wheel. Once wheel spin is eliminated, the dash lamp goes out and the traction system disengages control. In the event that extended periods of traction operation are experienced, without vehicle motion being detected, the ABS traction system will disable traction control to prevent brake fade. The system will re-enable traction control after a short
BENDIX EC-16 ANTILOCK CONTROLLER Monitor Manual
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