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

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Bendix EC-60
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
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.
ABS / ATC Controllers (Standard & Premium Models)
Frame and Cab Mount
Standard Frame
Premium Frame
Standard Cab
Premium Cab

TABLE OF CONTENTS

General System Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ECU Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
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EC-60
EC-60 ™
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EC-60
ABS Off-Road Switch and Indicator Lamp . . . . . . . 4
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EC-60
Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . 5
ABS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ATC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dynamometer Test Mode . . . . . . . . . . . . . . . . . . . . 8
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Automatic Tire Size Calibration . . . . . . . . . . . . . . . 8
ABS Partial Shutdown . . . . . . . . . . . . . . . . . . . . . . . 9
System Reconfiguration
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EC-60
Troubleshooting
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Diagnostic Trouble Codes . . . . . . . . . . . . . . . . . . 12
Using Hand-Held or PC-based Diagnostics . . . 13
Diagnostic Trouble Code Troubleshooting Index . 16
Connector and Harnesses . . . . . . . . . . . . . . . 28-31
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-34
Wiring Schematics . . . . . . . . . . . . . . . . . . . . . 28-31
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
FIGURE 1 - EC-60
Controller Hardware Configurations . . . . 2
Controllers with PLC . . . . . . . . . . . . . . . . . 3
Controller Inputs . . . . . . . . . . . . . . . . . . . . 3
Controller Outputs . . . . . . . . . . . . . . . . . . . 4
Controller System Reconfiguration . . . . 10
Trouble Code Tests . . . . . . . . . . . . . 18 - 27
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CONTROLLERS
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