ARMY
TM 5-6115-612-34
MARINE CORPS
TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320B0-MME-000
10-2. ENGINE
ELECTRONIC
CONTROL
MODULE (EECM). (cont)
(c) Move MASTER SWITCH to
START position. The STARTER light should come on.
Quickly increase function generator to a frequency
between 2900 and 3200 Hz before EECM timeout.
During frequency increase IGNITION and FUEL lights
will come on and then STARTER and IGNITION lights
will go off.
(d) Slowly increase millivolt source
until OVERTEMP light comes on. This should happen
between 29.8 and 32.2 millivolts. The FUEL light
should go out when the OVERTEMP light goes on.
(e) Move MASTER SWITCH to
OFF position. All lights should be off.
(f) Any discrepancy noted during
the above procedure indicates a failure in the EECM
overtemperature circuit. Refer to Table 2-4,
Malfunction 4.
(7) Engine overtemperature test.
(a) Adjust function generator to a
frequency between 0 and 200 Hz and adjust millivolt
source to 96 to 1.20 millivolts.
NOTE
EECM electronics requires a frequency
below 200 Hz.
(b) Move MASTER SWITCH to
RUN position. All lights should be off.
NOTE
Read step (c) completely before perform-
ing step (c).
(c) Move MASTER SWITCH to
START position. The STARTER light should come on.
Quickly increase function generator to a frequency
between 2900 and 3200 Hz before EECM timeout.
During frequency increase IGNITION and FUEL lights
will come on and then STARTER and IGNITION lights
will go off. The FUEL light should remain on.
(d) Continue to increase function
generator frequency until READY TO LOAD light
comes on. This happens between 3300 to 3500 Hz.
(e) Increase millivolt source until
engine OVERTEMP light comes on. This should
happen between 27.5 and 28.6 millivolts. The FUEL
and READY TO LOAD lights should be off.
(f) Move MASTER SWITCH to
OFF position. All lights should remain off.
(g) Any discrepancy noted during
the above procedure indicates a failure in the EECM
overfemperature circuit.
Refer to Table 2-4,
Malfunction 4.
(8) Sixty percent switch test.
(a) Adjust. function generator to a
frequency between 0 and 200 Hz and adjust millivolt
source to 96 to 1.20 millivolts.
NOTE
EECM electronics requires a frequency
below 200 Hz.
(b) Move MASTER SWITCH to
RUN position. All lights should be off.
NOTE
Read steps (c) and (d) completely before
continuing and performing steps (c) and
(d).
(c) Move MASTER SWITCH to
START position. The STARTER light should come on.
(d) Quickly increase function gen-
erator to between 1400 and 1800 Hz. IGNITION and
FUEL lights should come on.
10-12 Change 1
