User manual BENDIX EC-13 TRAILER ANTILOCK CONTROL

[. . . ] Bendix® EC-13TM Trailer AntiLock Controller Assembly MOUNTING HOLES (4) EC-13TM Trailer AntiLock Controller DIAGNOSTIC WINDOW 30 PIN WIRE HARNESS CONNECTOR FIGURE 1 - EC-13TM TRAILER ANTILOCK CONTROLLER DESCRIPTION GENERAL Bendix trailer antilock systems utilizing the EC-13 TM electronic controller assembly provide AXLE braking control for trailers. By controlling "wheel lock-up" during aggressive braking, the trailer retains a high degree of stability and steerability while braking, and vehicle stopping distance may be reduced. In order to provide AXLE control antilock, the EC-13TM controller is used in combination with the following components; Four, individual wheel speed sensors Two M-12RTM remote mount modulator-relay valves or a combination of one M-12TM and one M-12RTM modulator A diagnostics display window with 9 light emitting diodes (LEDs) and a magnetically actuated reset switch is incorporated in the housing for troubleshooting and diagnostic purposes. A single electrical connector is currently used on the EC-13TM controller, for connection to the antilock system components; a 30 pin, Packard Electric, 150 series "Metripack. " MOUNTING The EC-13TM controller can be remote bracket mounted to a frame member or can be mounted directly on a modulatorrelay valve assembly, such as the Bendix® M-12TM modulator (reference SD-13-4772). [. . . ] Note and mark the position of the EC-13TM controller relative to the M-12TM modulator. Remove and retain the four hex cap screws that secure the EC-13TM controller to the M-12TM modulator. Carefully separate the EC-13TM controller from the M-12TM modulator enough to expose the wire harness that connects both units electrically. Disconnect the wire harness by separating the four pin connector at the EC-13TM controller. Peel the gasket from the EC-13TM controller or M-12TM modulator and retain for reuse. Note: Use a new gasket if damaged during removal or if a new gasket is immediately available. Removing a Bracket Mounted Remote EC-13TM Controller: 1. Disconnect the electrical connector (on the vehicle wiring harness) from the EC-13TM controller. Note and mark the mounting position of the EC-13TM controller assembly on the trailer. Loosen, remove and save the mounting hardware that attaches the EC-13TM controller bracket to the trailer. Remove the EC-13TM controller and bracket assembly from the trailer. LED Indicators EC-13TM Controller EC-13TM Controller Diagnostic Window FIGURE 7 - EC-13TM CONTROLLER DIAGNOSTIC WINDOW INSTALLING EC-13TM CONTROLLER ASSY Installing the EC-13TM Controller and M-12TM Modulator: 1. After noting the positioning marks made prior to disassembly, reconnect the M-12TM modulator wire harness to the EC-13TM controller, position the gasket on the EC-13TM controller then secure the EC-13TM controller to the M-12TM modulator using the four cap screws. Mount the assembled MC-13TM modulator controller on the trailer and orient it in the position marked prior to removal. Reconnect the electrical connector (on the vehicle wiring harness) to the EC-13TM controller. Test the MC-13TM modulator controller for operation and air leakage prior to placing the trailer in service. Perform the "Initial Start-up Procedure" in the TROUBLESHOOTING section to assure proper antilock system operation. problems that occur but is not confused by the diagnostic information. A special feature of the EC-13TM controller diagnostic system is its problem indication latching. Intermittent problems, particularly in the wheel speed sensing area can be difficult to diagnose. When the controller senses an erroneous condition, whether in the controller electronics, the modulator or speed sensing areas, it stores the condition in non-volatile memory, disables the antilock function if necessary, illuminates the condition lamp and the appropriate diagnostic LEDs on the EC-13TM controller. The condition is truly stored and is not cleared by loss of power to the EC-13TM controller. The LEDs will re-light when power is restored and remain illuminated until the problem is corrected. After the actual problem is corrected, maintenance personnel can clear or reset the EC-13TM controller diagnostics by passing a small magnet over the RESET point in the diagnostics window. INSTALLING A BRACKET MOUNTED REMOTE EC-13TM CONTROLLER 1. [. . . ] IF RESISTANCE IS NOT CORRECT (BETWEEN 1500-2500 OHMS FOR THE BENDIX® WS-20TM SENSOR), REPLACE SENSOR, OTHERWISE PROCEED TO STEP B. CHECK "GAP" BETWEEN SPEED SENSOR AND EXCITER OR TONE RING. (GAP FOR BENDIX® WS-20TM SPEED SENDER IS BETWEEN 0 - . 015 INCHES) IF SENSOR GAP MUST BE ADJUSTED, CHECK FOR LOOSE OR WORN WHEEL BEARINGS BEFORE RE-GAPPING SENSOR. REFER TO VEHICLE MAINTENANCE MANUAL FOR WORN BEARINGS. [. . . ]