BENDIX EC-30 ABS-ATC CONTROLLER User Manual

1
®
SD-13-4815
TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . PAGE
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
EC-30
™
Controller Hardware Configurations . . . . . . . . 3
EC-30
™
Controller With PLC . . . . . . . . . . . . . . . . . . . . . . 3
EC-30
™
Controller Inputs . . . . . . . . . . . . . . . . . . . . . . . . 4
EC-30
™
Controller Outputs . . . . . . . . . . . . . . . . . . . . . . . 4
Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ABS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ATC Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Auto-Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
EC-30
™
Controller Configurable Parameters . . . . . . . . 8
EC-30
™
Controller Self-Configuration . . . . . . . . . . . . . . 8
Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ABS Partial Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
EC-30
™
Controller Diagnostic Display . . . . . . . . . . . . . . 9
Blink Code Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 10
Bendix DCI Diagnostic Tool . . . . . . . . . . . . . . . . . . . . . 14
Bendix ABS Diagnostic Software . . . . . . . . . . . . . . . . . 15
NEXIQ (MPSI) Bendix Cartridge . . . . . . . . . . . . . . . . . . 15
Contacting Bendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Safe Maintenance Practices . . . . . . . . . . . . . . . . . . . . . 15
Removing the EC-30
™
Controller Assembly . . . . . . . . 16
Installing a New EC-30
™
Controller . . . . . . . . . . . . . . . 16
ABS and ATC Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
INTRODUCTION
The Bendix
®
EC-30
™
is an electronic ABS (antilock braking
system) controller. It is the base component in a family of
ABS assemblies for heavy and medium duty buses, trucks
and tractors utilizing pneumatic braking systems.
The ABS function of the EC-30
™
controller is designed to
optimize slip on all vehicle wheels. The EC-30
™
controller
provides the vehicle with improved stability and steerability
during braking. The EC-30
™
controller will also reduce vehicle
stopping distance on most surfaces.
In addition to the ABS function, the EC-30
™
controller can
be configured to provide an ATC (automatic traction control)
feature. Bendix ATC can improve vehicle traction during
acceleration on adverse road conditions. ATC can utilize
engine torque limiting and/or differential braking to improve
vehicle traction.
Bendix
®
EC-30
™
ABS / ATC Controller
FIGURE 1 - EC-30
™
CONTROLLER
18-pin
Connector
Mounting Inserts
(4 Places)
LED Diagnostic
Display
30-pin
Connector
Part Number
Label

BENDIX EC-30 ABS-ATC CONTROLLER Specifications

General

Type	ABS-ATC Controller
Model	EC-30
Manufacturer	Bendix
Function	Anti-lock Braking System (ABS) and Automatic Traction Control (ATC)
Operating Temperature	-40°C to +85°C
Protection Rating	IP67
Supply Voltage	12/24V DC
Communication Protocol	J1939
ATC Functionality	Yes

Summary

ABS and ATC Operation Modes

ABS Operation Principles

Explains how ABS optimizes slip and controls modulators.

ATC Operation Principles

Details ATC functions like engine torque limiting and differential braking.

EC-30 a0 Controller Configuration and Self-Tests

EC-30 a0 Controller Self-Configuration

Fault Detection Mechanisms

Describes the controller's self-testing for ABS/ATC components and wiring.

EC-30 a0 Controller Fault Handling and Diagnostics

ABS Partial Shutdown Scenarios

Specific Fault Conditions and Actions

Reading and Resetting Fault Codes

EC-30 a0 Controller Blink Code Diagnostics

Blink Code Activation and Functions

Displaying Active and History Fault Codes

EC-30 a0 Controller Blink Code Definitions (Power & Sensors)

Power and ABS Controller Fault Codes

Wheel Speed Sensor Fault Codes

Provides definitions and repair info for wheel speed sensor faults.

EC-30 a0 Controller Blink Code Definitions (Sensors & Modulators)

Wheel Speed Sensor Fault Codes (Continued)

Continues the list of wheel speed sensor fault codes and repair information.

Modulator and Sensor Mismatch Faults

EC-30 a0 Controller Blink Code Definitions (Modulators & Systems)

ABS Modulator Fault Codes

Lists fault codes for ABS modulator open, short, VBAT, and solenoid issues.

Retarder Relay and ATC Modulator Faults

Bendix DCI Diagnostic Tool Usage

Using the Bendix DCI for Diagnostics

Reading and Resetting Faults with DCI

Bendix Diagnostic Software and Support

Bendix ABS Diagnostic Software

Describes the PC-based software for diagnostics and configuration.

Safe Maintenance Practices and Controller Handling

General Safety Precautions

Lists essential safety warnings for working on vehicles and systems.

Removing the EC-30 a0 Controller Assembly

Installing a New EC-30 a0 Controller

EC-30 a0 Controller Installation, Wiring, and Troubleshooting

EC-30 a0 Controller Installation Procedures

ABS and ATC Wiring Best Practices

Troubleshooting Approach and Flowcharts

Outlines the process for fault isolation and references troubleshooting flowcharts.

Troubleshooting: ABS and ATC Warning Lamp Power-Up

ABS Warning Lamp Power-Up Troubleshooting

Flowchart for diagnosing ABS warning lamp behavior during power-up.

ATC Active/Warning Lamp Power-Up Troubleshooting

Flowchart for diagnosing ATC active/warning lamp behavior during power-up.

Troubleshooting: Trailer ABS Warning Lamp Power-Up

Trailer ABS Warning Lamp Power-Up Diagnosis

Flowchart for troubleshooting the trailer ABS warning lamp during power-up.

Troubleshooting the ABS Warning Lamp

ABS Lamp Did Not Illuminate

Troubleshooting steps when the ABS warning lamp fails to illuminate.

ABS Lamp Stays On

Steps to diagnose why the ABS warning lamp remains illuminated.

Troubleshooting the ATC Active/Warning Lamp

ATC Lamp Did Not Illuminate

Troubleshooting steps for when the ATC active/warning lamp doesn't illuminate.

ATC Lamp Stays On

Steps to diagnose why the ATC active/warning lamp remains illuminated.

Troubleshooting the Trailer ABS Warning Lamp

Trailer ABS Lamp Did Not Illuminate

Steps for diagnosing a non-illuminating trailer ABS warning lamp.

Trailer ABS Lamp Stays On

Steps to diagnose why the trailer ABS warning lamp remains on.

EC-30 a0 Controller Power Troubleshooting

Diagnosing Power Issues via LED Status

Identifies power problems based on ABS lamp and VLT LED behavior.

Measuring Loaded Voltage for Power Checks

Details using a load bulb to test power delivery under load.

Troubleshooting Wheel Speed Sensors

Static Wheel Speed Sensor Faults

Guides on diagnosing static faults using OHM and continuity checks.

Dynamic Wheel Speed Sensor Faults

Explains how to diagnose dynamic faults using AC voltage output checks.

Troubleshooting ABS Modulators

Static ABS Modulator Faults

Dynamic ABS Modulator Faults

Troubleshooting the ATC Modulator

ATC Modulator Fault Diagnosis

Troubleshooting EC-30 a0 Controller Serial Communication

Serial Communication Fault Diagnosis