3
Diagnostics, Troubleshooting and Testing
38
WABCO
Maintenance Manual MM-0112 (Revised 07-18)
Figure 3.46
Figure 3.47
Figure 3.48
Figure 3.49
Figure 3.4
6
Figure 3.47
ECU
J1939 Datalink
Circuit
Connector
Pins
Cab-Mounted
All
J1939 High
X1-15 pin
3
J1939 Low
X1-15 pin
1
Frame-Mounted
Without ESC
J1939 High
X1-Gray
7
J1939 Low
X1-Gray
6
Frame-Mounted
With ESC
J1939 High
X1-Black
18
J1939 Low
X1-Black
6
ECU
J1587 Datalink
Circuit
Connector
Pins
Cab-Mounted ECU J1939 High
X1
11
J1939 Low
10
Frame-Mounted
ECU without ESC
J1939 High
X1-Gray
4
J1939 Low
9
4007373
a
CAB MOUNT ECU’S
LOOKING INTO WIRE HARNESS CONNECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
1
4
15
X1
4007374
a
FRAME MOUNT ECU
WITHOUT ESC
LOOKING INTO WIRE
HARNESS CONNECTOR
FRAME MOUNT ECU
WITH ESC
LOOKING INTO WIRE
HARNESS CONNECTOR
1
2
3
4
5
6
7
10
12
9
11
8
X1-GRAY
1
2
3
4
5
6
7
10
12
9
11
8
X1-BLACK
13
16
18
15
17
1
4
Frame-Mounted
ECU with ESC
J1939 High
X1-Black
4
J1939 Low
1
6
Figure 3.48
Figure 3.49
ECU
J1587 Datalink
Circuit
Connector
Pins
4012026
a
CAB MOUNT ECU’S
LOOKING INTO WIRE HARNESS CONNECTOR
1
2
3
4
5
6
7
8
9
10
11
12
13
1
4
15
X1
4012027
a
FRAME MOUNT ECU
WITHOUT ESC
LOOKING INTO WIRE
HARNESS CONNECTOR
FRAME MOUNT ECU
WITH ESC
LOOKING INTO WIRE
HARNESS CONNECTOR
1
2
3
4
5
6
7
10
12
9
11
8
X1-GRAY
1
2
3
4
5
6
7
10
12
9
11
8
X1-BLACK
13
16
18
15
17
1
4
