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
Visually inspect ECU 20A F8
1.
If damaged or has loose
30.
ECU 20A F8 Fuse
fuse sockets for damage or
sockets, replace cab wiring
Sockets Are
loose sockets. (Volume 5,
harness. (Volume 4,
Damaged or Are
Loose.
WP 0800, Figure 154)
WP 0504) Restore machine to
original condition.
2.
If not damaged and does not
have loose sockets, proceed to
Malfunction 31.
1.
Verify the key switch is in the
31.
Voltage Between
OFF position (TM
POWER ON 5A F16
5-3805-294-10). (Volume 5,
fuse socket 1 and
Ground Not Within
WP 0794)
1 Volt of Battery
Terminal Voltage.
2.
Measure voltage (Volume 3,
WP 0369) between battery
negative and positive
terminals. (Volume 5,
WP 0800, Figure 5) Note
battery terminal voltage.
3.
Turn key switch to ON position,
but DO NOT START ENGINE
(TM 5-3805-294-10). (Volume
5, WP 0794)
4.
Measure voltage (Volume 3,
WP 0369) between POWER
ON 5A F16 fuse socket 1
(Volume 5, WP 0800, Figure
161) and a known good
ground. Note reading.
5.
Turn key switch to OFF
1.
If within 1 volt of battery
position (TM 5-3805-294-10).
terminal voltage, proceed to
Malfunction 32.
(Volume 5, WP 0794)
2.
If not within 1 volt of battery
terminal voltage, proceed to
Key Switch Does Not
Operate. (Volume 2,
WP 0179)
0124-10