BENDIX EC-60 ABS-ATC STD-PREM CONTROLLERS manual Introduction

SD-13-4863

Bendix® EC-60™ABS / ATC Controllers (Standard & Premium Models)

Frame and Cab Mount

Standard Frame Standard Cab

Premium Frame Premium Cab

INTRODUCTION

Bendix® EC-60™controllers are members of a family of electronic Antilock Braking System (ABS) devices designed to help improve the braking characteristics of air braked vehicles - including heavy and medium duty buses, trucks, and tractors. ABS controllers are also known as Electronic Control Units (ECUs).

Bendix ABS uses wheel speed sensors, ABS modulator valves, and an ECU to control either four or six wheels of a vehicle. By monitoring individual wheel turning motion during braking, and adjusting or pulsing the brake pressure at each wheel, the EC-60™controller is able to optimize slip between the tire and the road surface. When excessive wheel slip, or wheel lock-up, is detected, the EC-60™controller will activate the Pressure Modulator Valves to simulate a driver pumping the brakes. However, the EC-60™controller is able to pump the brakes on individual wheels (or pairs of wheels), independently, and with greater speed and accuracy than a driver.

In addition to the ABS function, premium models of the EC-60™controller provide an Automatic Traction Control (ATC) feature. Bendix ATC can improve vehicle traction during acceleration, and lateral stability while driving through curves. ATC utilizes Engine Torque Limiting (ETL) where the ECU communicates with the engine’s controller and/or Differential Braking (DB) where individual wheel brake applications are used to improve vehicle traction.

Premium EC-60™controllers have a drag torque control feature which reduces driven-axle wheel slip (due to driveline inertia) by communicating with the engine’s controller and increasing the engine torque.

FIGURE 1 - EC-60™CONTROLLERS

TABLE OF CONTENTS	PAGE
General System Information

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ECU Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 EC-60™Controller Hardware Configurations . . . . 2 EC-60™Controllers with PLC . . . . . . . . . . . . . . . . . 3 EC-60™Controller Inputs . . . . . . . . . . . . . . . . . . . . 3 ABS Off-Road Switch and Indicator Lamp . . . . . . . 4 EC-60™Controller Outputs . . . . . . . . . . . . . . . . . . . 4 Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . 5 ABS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ATC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Dynamometer Test Mode . . . . . . . . . . . . . . . . . . . . 8 Automatic Tire Size Calibration . . . . . . . . . . . . . . . 8 ABS Partial Shutdown . . . . . . . . . . . . . . . . . . . . . . . 9

System Reconfiguration

EC-60™Controller System Reconfiguration . . . . 10

Troubleshooting

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Diagnostic Trouble Codes . . . . . . . . . . . . . . . . . . 12 Using Hand-Held or PC-based Diagnostics . . . 13 Diagnostic Trouble Code Troubleshooting Index . 16 Trouble Code Tests . . . . . . . . . . . . . 18 - 27 Connector and Harnesses . . . . . . . . . . . . . . . 28-31 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-34 Wiring Schematics . . . . . . . . . . . . . . . . . . . . . 28-31 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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