6 Appendix II — Wiring Diagrams
46
Meritor WABCO Maintenance Manual MM-0112 (Revised 07-05)
4S/4M Universal ECU (Cab-mounted) with RSC
Figure 6.6
Figure 6.6
BACK VIEW OF HARNESS CONNECTOR
RSC +
RSC –
3
2 1
6
5 4
9
8 7
12
11 10
15
14 13
15 PIN CONNECTOR
RSC VALVE
NOT USED 9
NOT USED 2
NOT USED 5
NOT USED 3
NOT USED 6
NOT USED 11
NOT USED 14
NOT USED 12
NOT USED 15
GND*
BACK VIEW OF HARNESS CONNECTOR
INLET
VALVE
INLET
VALVE
INLET
VALVE
OUTLET
VALVE
OUTLET
VALVE
OUTLET
VALVE
OUTLET
VALVE
INLET
VALVE
DIF-
SENSOR
SENSOR
SENSOR
SENSOR
SENSOR
SENSOR
3
2 1
6
5 4
9
8 7
12
11 10
15
14 13
SENSOR
SENSOR DIF+
18
17 16
18 PIN CONNECTOR
SENSOR 10
SENSOR 13
SENSOR 11
SENSOR 14
SENSOR 12
SENSOR 15
DIF+ 16
SENSOR 17
SENSOR 18
INLET
VALVE
OUTLET
VALVE
INLET
VALVE
OUTLET
VALVE
INLET
VALVE
OUTLET
VALVE
DIF-
INLET
VALVE
OUTLET
VALVE
RIGHT FRONT
ABS VALVE
LEFT FRONT
ABS VALVE
LEFT REAR
ABS VALVE
RIGHT REAR
ABS VALVE
RIGHT FRONT
SENSOR
LEFT REAR
SENSOR
LEFT FRONT
SENSOR
RIGHT REAR
SENSOR
TP
1
4
3
6
2
5
IV
GND
OV
IV
GND
OV
10
13
11
14
12
15
17
18
IV
GND
OV
IV
GND
OV
8
9
DIF
VALVE
1
4
3
6
2
5
7
TP
8
9
TP
TP
16 AWG
16 AWG
16 AWG
16 AWG
8
13
BACK VIEW OF HARNESS CONNECTOR
SAE
J1939
H
TR-WL
SAE
J1939
L
AT C
ABS ECU-
GND
BAT ECU+
JUMPER
SAE
J1587
A
SAE
J1587
B
ABS
LAMP
3RD
BRK
AT C
LAMP
3
2 1
6
5 4
9
8 7
11 10
15
14 13
14 PIN CONNECTOR
TRAILER INDICATOR LAMP
TP
1
3
J1939 L
J1939 H
10
11
8
15A AMP
5 AMP
14 AWG
BAT
IGN
J1587 B
J1587 A
TP
AT C
SWITCH
J1587 B
J1587 A
J1939 L
J1939 H
BATTERY
ECU+
RETARDER
TRAILER
INDICATOR
LAMP
ATC LAMP
TRACTOR
INDICATOR
LAMP
ATC SWITCH
ABS OFF
ROAD
ECU-
GND
10
11
1
3
8
7
14
2
13
15
6
5
4
9
4
9
ATC/RSC LAMP
TRACTOR INDICATOR LAMP
2
13
15
BLINK CODE
SWITCH
ABS OFF ROAD SWITCH
7
14 AWG
86
30
87
14
87A
85
RETARDER
4004030e
Momentary Switch
Optional Equipment
Twisted Pair = TP
All unmarked wires should be 16 or 18 AWG.
All fuses should be blade type.
*All connected to a common star ground.
8
13
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