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. Troub leshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7
8
Step 3.
.
LOW OIL PRESS
Check continuity of wires from switch circuit card P2-17 to
J6-L and from P2-29 to J4-F.
Repair or replace wires as necessary.
MALFUNCTION LIGHT - PROBLEM ISOLATED TO EECM.
Check continuity of wires from J5-A to switch circuit card P2-2
and from J5-B to E1(-) ground terminal.
Repair or replace wires as necessary.
Connect EECM under test to EECM tester. Move LOW OIL switch to
ON.
Move MASTER SWITCH to START position and then to RUN
position.
Inject a signal
into SPEED input.
Increase
frequency to 3352 Hz ± 67 Hz.
Connect voltmeter to switch
board Q7-C and to E1(-) ground terminal.
If voltage is greater than 1.5 Vdc, replace switch circuit
card (paragraph 10-2b).
If LOW OIL PRESS light comes on but unit does not shut down,
connect voltmeter to P1-9(+) and to E1(-) ground terminal.
Move LOW OIL switch to OFF.
If voltage is less than 1.5 Vdc, replace switch board
(paragraph 10-2b).
If voltage is greater than 1.5 Vdc, replace microprocessor
circuit card (paragraph 10-2b).
MALFUNCTION - PROBLEM ISOLATED TO EECM.
Use an ohmmeter and check the following wires between J4 and
switch circuit card P2 for damage or shorts.
J4-A to P2-15
J4-B to P2-9
J4-C to P2-6
J4-D to P2-12
Repair or replace wires as necessary.
If no shorts or damage, go to Step 2.
2-45
