Section 2: System Components - WABCO Easy-Stop Basic Maintenance Manual

Section 2System Components
ECU/Valve Assembly
12 volt
Integrated ECU and ABS relay valve
The 2S/1M Basic ECU/Valve Assembly does not
have an external diagnostics connector.
Figure 2.1
2S/1M BASIC
1 2S/1M Basic
2 Standard
ABS External Valve
Controls air pressure to the brake chambers
where it is plumbed.
During ABS operation, the valve adjusts air
pressure to the brake chambers to control
braking and prevent wheel lock.
Used in conjunction with ECU/Valve Assembly
for 2M or 3M systems.
Figure 2.2
STANDARD
1002072d
1002073c
System Components
Sensor with Molded Socket
Measures the speed of a tooth wheel rotating
with the vehicle wheel.
Produces an output voltage proportional to
wheel speed.
Figure 2.3
Sensor Spring Clip
Holds the wheel speed sensor in close proximity
to the tooth wheel.
Figure 2.4
Sensor Extension Cable
Two-wire cable with molded-on connector.
Connects the wheel speed sensor to the ECU.
Figure 2.5
Section 2
1002074a
1002075a
1002076a
Page 3