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
4.
Visually inspect connector X4
1.
If damaged or has loose
for damage or loose sockets/
sockets/pins, replace cab
pins.
wiring harness for socket side
of connector (Volume 4,
WP 0504) or machine wiring
harness for pin side of
connector. (Volume 4,
WP 0516)
2.
If not damaged or does not
have loose sockets/pins,
proceed to Malfunction 51.
Using a jumper wire, measure
1.
If less than 1 kohm, replace
51.
Short Circuit
resistance (Volume 3,
machine wiring harness.
Between Connector
H01 Pin 2 and
WP 0369) between connector
(Volume 4, WP 0516) Restore
Connector X4 Pin
H01 pin 2 (Volume 5,
machine to original condition
29.
WP 0800, Figure 40) and
2.
If greater than 1 kohm, replace
connector X4 pin 29. (Volume
cab wiring harness. (Volume 4,
5, WP 0800, Figure 85) Note
WP 0504) Restore machine to
reading.
original condition.
Measure resistance (Volume
1.
If less than 1 kohm, proceed to
52.
Short Circuit
Malfunction 53.
Between Connector
3, WP 0369) between
X1 Socket D and
connector X1 socket D
2.
If greater than 1 kohm,
Ground.
(Volume 5, WP 0800, Figure
discontinue this
144) and a known good
troubleshooting procedure and
ground. Note reading.
perform DTC 11004.02 as
though DTCs were active.
(Volume 2, WP 0218)
1.
Disconnect engine interface
53.
Short Circuit
wiring harness connector J02
Between Connector
from ECU. (Volume 5,
X1 Socket D and
Ground.
WP 0800, Figure 47)
2.
Disconnect engine interface
wiring harness connector
H01. (Volume 5, WP 0800,
Figure 40)
3.
Measure resistance (Volume
1.
If less than 1 kohm, replace
machine wiring harness.
3, WP 0369) between
connector X1 socket D
(Volume 4, WP 0516) Restore
machine to original condition.
(Volume 5, WP 0800, Figure
144) and a known good
2.
If greater than 1 kohm,
ground. Note reading.
proceed to Malfunction 54.
0124-18