ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320BO-MME-OOO
Section II.
TROUBLESHOOTING
2-3.
GENERAL.
This section contains
troubleshooting
information
for
locating and correcting malfunctions
that have been isolated to the engine
electronic control module (EECM) and to
the generator electronic control module
(GECM).
Table 2-4 lists the mal-
functions
by
number
and
provides
troubleshooting
procedures.
Each
malfunction is followed by tests and
inspections
that will help determine
the probable cause and the corrective
action to
take.
Perform
the
tests/inspections
and
corrective
actions in the order
listed.
After
repair,
always
repeat
the
test/inspection listed in table 2-4 to
ensure that the malfunction has been
corrected
and that no other mal-
functions exist.
This manual cannot
list all malfunctions that may occur,
nor
all
tests,
inspections,
and
corrective actions.
If a malfunction
is not listed or cannot be corrected by
listed
corrective
actions,
notify
supervisor.
Refer to paragraphs 4-2
and 10-2 for additional GECM and EECM
testing and maintenance procedures.
Table 2-4.
Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
DC CIRCUIT BREAKER TRIPPING - PROBLEM ISOLATED TO EECM.
Step 1.
Use an ohmmeter and measure resistance between P6-M and P6-N.
Move MASTER SWITCH to RUN.
If resistance is less than 100 ohms, go to Step 2.
If resistance is greater than 100 ohms, replace power
supply circuit card (paragraph 10-2b).
Step 2.
Disconnect connector P1 from power supply circuit card. Again,
use an ohmmeter and measure resistance between J6-M and J6-N.
If resistance is greater than 100 ohms, replace power
supply circuit card (paragraph 10-2b).
If resistance is less than 100 ohms, go to Step 3.
Step 3.
Disconnect connector P2 from switch circuit card.
Again
measure resistance between J6-M and J6-N.
If resistance is greater than 100 ohms, replace switch
circuit card (paragraph 10-2b).
If resistance is less than 100 ohms, go to Step 4.
2-40
