WABCO 2S/2M - Page 8

8
Preparation
3. Study the ECU/single modulator valve assembly. Note the location of the various ports and electrical
connections on the ECU. Figure 1, Figure 2, and Figure 3.
Fig. 1
4014012a
POWER SUPPLY
ABS SENSOR F
ABS SENSOR D
GIO 1
SUBSYSTEM/
DIAGNOSTIC
3rd MODULATOR/GIO 2
ABS SENSOR E
ABS SENSOR C
Fig. 2
4014013a
BOTTOM VIEW
DELIVERY
PORTS
DELIVERY
PORTS
EXHAUST
PORT
POWER
SUPPLY
SUBSYSTEM/
DIAGNOSTIC
GIO 1
3RD MODULATOR/
GIO 2
ABS
SENSOR
D
ABS
SENSOR
F
ABS
SENSOR
C
ABS
SENSOR
E
Fig. 3
4014007b
CONTROL
PORT
DELIVERY PORTS 2.2
DELIVERY
PORTS 2.1
SUPPLY
PORT