BENDIX A-18 TRAILER ABS Instruções de Operação descarregar pdf (Página 6)

Section 1

Introduction

Page 2

Easy-Stop™ Trailer ABS Parts

Parts book PB-96133 lists Meritor WABCO

Easy-Stop™ replacement parts. To obtain a copy,

contact the Meritor Customer Support Center

at 800-535-5560.

What Is Meritor WABCO’s

Easy-Stop™ Trailer ABS?

Meritor WABCO’s Easy-Stop™ Trailer ABS is an

electronic, self-monitoring system that works

with standard air brakes. The major components

of the system are the Electronic Control Unit

(ECU)/Valve Assembly, ABS relay (modulator)

valve, tooth wheel and wheel speed sensor.

Refer to Figure 1.2 .

ECU Part Numbers 472 500 001 0, 472 500 012 0

and 472 500 013 0 have an external diagnostics

connector for use with a special diagnostic tool.

These models are also compatible with an MPSI

Pro-Link

9000 diagnostic tool and Meritor WABCO

cartridge. ECU/Valve Assembly 472 500 011 0 does

not have a diagnostic connector port. Diagnostic

procedures for all of these ECUs are detailed in

Section 5, "Diagnostics" of this manual.

The ABS configuration defines the number of

wheel speed sensors and ABS relay valves used in

a system. For example, a 2S/1M configuration

includes two wheel sensors and one ABS relay

valve. A 2S/2M configuration includes two wheel

sensors and two relay valves. A 4S/2M

configuration includes four wheel sensors and

two ABS relay valves.

How Trailer ABS Works

Meritor WABCO ABS is an electronic system that

monitors and controls wheel speed during

braking. The system works with standard air

brake systems.

ABS monitors wheel speeds at all times and

controls braking during wheel lock situations. The

system improves vehicle stability and control by

reducing wheel lock during braking.

The ECU receives and processes signals from the

wheel speed sensors. When the ECU detects a

wheel lockup, the unit activates the appropriate

modulator valve, and air pressure is controlled.

In the event of a malfunction in the system, the

ABS in the affected wheel(s) is disabled; that wheel

still has normal brakes. The other wheels keep the

ABS function.

An ABS warning lamp lets drivers know the status

of the system.

Figure 1.2

1 ECU/Valve Assembly

2 External ABS Relay Valve (not used in

1M configurations)

3 Tooth Wheel

4 Wheel Speed Sensor

1002071d

1 2 3 4 5 6 7 8 9 10 11 ... 43 44

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BENDIX A-18 TRAILER ABS Instruções de Operação Página 6

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