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
1.
Turn key switch to ON position,
32.
Voltage Between
but DO NOT START ENGINE
ECU 20A F8 Fuse
(TM 5-3805-294-10). (Volume
Socket 2 and
Ground Not Within
5, 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.
Measure voltage (Volume 3,
WP 0369) between ECU 20A
F8 fuse socket 2 (Volume 5,
WP 0800, Figure 154) and a
known good ground. Note
reading.
4.
Turn key switch to OFF
1.
If within 1 volt of battery
position (TM 5-3805-294-10).
terminal voltage, proceed to
Malfunction 33.
(Volume 5, WP 0794)
2.
If not within 1 volt of battery
terminal voltage, proceed to
All 24 VDC Circuits Do Not
Operate. (Volume 2,
WP 0169)
1.
Disconnect engine wiring
33.
Engine Wiring
harness connector J02.
Harness Connector
J02 Has Damage or
(Volume 5, WP 0800, Figure
Loose Sockets.
47)
2.
Visually inspect engine wiring
1.
If damaged or has loose
harness connector J02 for
sockets, repair connector J02
damage and loose sockets.
(Volume 4, WP 0511) or
replace engine interface wiring
harness. (Volume 4,
WP 0509) Restore machine to
original condition.
2.
If not damaged and does not
have loose sockets, proceed to
Malfunction 34.
0124-11