ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320BO-MME-OOO
2-3. GENERAL. (cont)
Table 2-4. Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Connect voltmeter to P1-11(+). Release MASTER SWITCH to RUN.
If voltage is less than 1.5 Vdc, replace microprocessor
circuit card (paragraph 10-2b).
If voltage
is 1.5 Vdc or greater, connect voltmeter
positive(+) to switch circuit card TB1-2.
If voltage is
less than 20 Vdc, replace switch card (paragraph 10-2b).
If voltage is 20 Vdc or greater, check continuity.
P2-20 to K2-X1
K2-A2 to E2
K2-X1 to E1 (ground)
K2-A1 to J5-K
Repair or replace as necessary. If continuity is present,
replace relay K2 (paragraph 10-2g).
4.
ENGINE OVERTEMP MALFUNCTION - PROBLEM ISOLATED TO EECM.
Step 1.
Inspect and check continuity of wires from J5-R and J5-S to
microprocessor board P2-6 and P2-7.
Repair or replace wires as necessary.
Step 2.
Connect EECM under test to EECM tester.
Short EGT input
terminals together.
Move MASTER SWITCH to RUN position.
Connect voltmeter to P1-8(+) and E1(-) ground terminal.
If voltage is less than 1.5 Vdc, replace microprocessor
circuit card (paragraph 10-2b).
If voltage is 1.5 Vdc or greater, connect voltmeter
positive(+) to switch circuit card Q1-C. If voltage is 19
Vdc or less, replace switch circuit card (paragraph 10-2b).
5.
OVERSPEED MALFUNCTION INDICATOR - PROBLEM ISOLATED TO EECM.
Step 1.
Inspect and check continuity of wires from J5-G to micro-
processor board P2-5 and from J5-F to microprocessor board P2-8.
If no continuity, repair or replace wires as necessary.
If continuity present, go to Step 2.
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