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REVISED 5/31/05
®�
SD-13-4869
Bendix
®
EC-60
™
ABS / ATC Controllers (Advanced Models)
See SD-13-4863 for Standard and Premium Controllers
FIGURE 1 - EC-60
™
ADVANCED CONTROLLER
INTRODUCTION
The Bendix
®
EC-60
™
advanced controller is a member
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 pressure
modulator valves, and an ECU to control either four or
six wheels of a vehicle. The EC-60
™
controller monitors
individual wheel turning motion during braking and adjusts
or modulates the brake pressure at the wheel end. When
excessive wheel slip, or wheel lock-up is detected, the
EC-60
™
controller will activate the pressure modulator
valves to automatically reduce the brake pressure at one
or more of the wheel ends. By these actions, the ABS
system helps to maintain the vehicle's lateral stability and
steerability during heavy brake applications and during
braking on slippery surfaces.
In addition to the ABS function, advanced 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 accelerating
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.
Advanced 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.
The EC-60
™
advanced model provides ABS-based stability
features referred to as ESP
®
Electronic Stability Program.
ESP
®
is a registered trademark of DaimlerChrysler and is
used by BCVS under license from DaimlerChrysler.
TABLE OF CONTENTS PAGE
General System Information
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Components
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ECU Mounting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
EC-60
™
Controller Hardware Configurations . . . . . . 3
EC-60
™
Controllers with PLC . . . . . . . . . . . . . . . . . . 3
EC-60
™
Controller Inputs . . . . . . . . . . . . . . . . . . . . . 4
ABS Off-Road Switch and Indicator Lamp . . . . . . . . 4
EC-60
™
Controller Outputs . . . . . . . . . . . . . . . . . . . . 5
Power-Up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . 6
ABS Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
A
TC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Advanced
ABS with Stability. . . . . . . . . . . . . . . . . . . 9
Y
aw Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Dynamometer
Test Mode . . . . . . . . . . . . . . . . . . . . . 9
Automatic
Tire Size Calibration. . . . . . . . . . . . . . . . 10
ABS Partial Shutdown
. . . . . . . . . . . . . . . . . . . . . . 10
System Reconfiguration
EC-60
™
Controller System Reconfiguration . . . . . . 11
Troubleshooting
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Steering
Angle Sensor Calibration . . . . . . . . . . . . . 13
Y
aw Rate/Lateral Acceleration Calibration . . . . . . . 14
Diagnostic
Trouble Codes. . . . . . . . . . . . . . . . . . . . 16
Using Hand-Held or PC-based Diagnostics
. . . . . . 19
Diagnostic
Trouble Code Troubleshooting Index . . 21
Trouble Code Tests . . . . . . . . . . . . . 22 - 37
Connectors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-41
Wiring Schematics
. . . . . . . . . . . . . . . . . . . . . . . . . 42
Glossary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
J1587 SID and FMI Codes
. . . . . . . . . . . . . . . 44-47
The Bendix ESP system is an ABS-based stability system
that enhances vehicle stability by both reducing engine
throttle and by applying vehicle braking based on actual
vehicle dynamics. Accordingly, the ESP system is available
only on specific approved vehicle platforms after vehicle
application and development efforts and validation testing.
Only certain limited variations of an approved vehicle
platform are permitted without further validation of the ESP
system application.
ESP stability system consists of Yaw Control (YC) and Roll
Stability Program (RSP) features.
CAUTION
Even with ESP-equipped vehicles, the driver remains
responsible for ensuring vehicle stability during
operation.