TM 5-3805-294-23-1
0124
Table 1. Engine Control Unit (ECU) Does Not Communicate With Service Advisor - Continued.
Test or Inspection
Corrective Action
Malfunction
3.
Visually inspect connector X3
1.
If damaged or has loose pins/
for damage and loose pins/
sockets, replace cab wiring
sockets.
harness for socket side of
connector (Volume 4,
WP 0504) or replace machine
wiring harness for pin side of
connector. (Volume 4,
WP 0516) Restore machine to
original condition.
2.
If not damaged and does not
have loose pins/sockets,
proceed to Malfunction 19.
Measure resistance (Volume
1.
If continuity is present, replace
19.
Open Circuit
cab wiring harness. (Volume 4,
Between Connector
3, WP 0369) between
X1 Socket B and
connector X1 socket B
WP 0504) Restore machine to
Connector X3 Pin
original condition.
(Volume 5, WP 0800, Figure
28.
144) and connector X3 pin 28
2.
If continuity is not present,
(Volume 5, WP 0800, Figure
replace machine wiring
84). Note reading.
harness. (Volume 4,
WP 0516) Restore machine to
original condition.
Visually inspect J1939 Cable
1.
If damaged or has loose pins/
20.
J1939 Cable Faulty.
For Damage or Loose Pins/
sockets, replace cable.
Sockets.
2.
If not damaged or does not
have loose pins/sockets,
proceed to Malfunction 21.
Measure resistance (Volume
1.
If continuity is present,
21.
Open Circuit
proceed to Malfunction 22.
Between J1939
3, WP 0369) between J1939
Cable 26 Pin
cable 26 pin connector socket
2.
If continuity is not present,
Connector Socket 9
9 and 9 pin connector socket
replace J1939 cable.
and 9 Pin
A. (Volume 5, WP 0800,
Connector Socket
Figure 143) Note reading.
A.
Measure resistance (Volume
1.
If continuity is present,
22.
Open Circuit
proceed to Malfunction 23.
Between J1939
3, WP 0369) between J1939
Cable 26 Pin
cable 26 pin connector socket
If continuity is not present,
2.
Connector Socket 8
8 and 9 pin connector socket
replace J1939 cable.
and 9 Pin
B. (Volume 5, WP 0800,
Connector Socket
Figure 143) Note reading.
B.
0124-7