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TM 10-4320-351-14
Section IV. UNIT TROUBLESHOOTING PROCEDURES
4.8 TROUBLESHOOTING.
Troubleshooting table 4-2 is provided to assist you in locating and correcting system faults. This table cannot list all the
malfunctions that may occur, all the tests and inspections needed to find the fault, or all the corrective actions needed to
correct the fault. If the equipment malfunction is not listed or actions listed do not correct the fault, notify your supervisor.
TABLE 4-2. TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1. Engine will not crank
Step 1.
Check electrical power to starter
a.
Check for +24 VDC at "+" terminal (I) of starter solenoid (2). If present, go to step 2.a.
b.
Disconnect battery power cable from engine module and check connector for +24 VDC between outer and
inner conductor.
Step 2.
Check continuity of starter power circuit
a.
Disconnect and remove wires from starter terminal (3) of starter solenoid. Check that resistance from starter
wire to ground is approximately zero (0) ohms. If the resistance is infinite or very high, replace starter. Refer
to paragraph 4.14.1.
b.
Check that resistance from center terminal of engine module NATO connector to " +" terminal (1) of starter
solenoid (2) is zero (0). If the resistance is infinite or very high, conduct a visual inspection of the NATO
connector and the starter power cable for broken or loose connections or cables.
c.
Disconnect battery power cable from battery. Check that resistance from center conductor of NATO
connector to "+" terminal of the battery connector is zero (0). Check that resistance from outer conductor of
NATO connector to "-" terminal of the battery connector is zero (0). If the resistance is infinite or very high,
repair or replace battery power cable W202.
2. Engine cranks but will not start
Check fuel supply to engine
a.
Drain and check fuel filter. Replace if clogged. Refer to paragraph 4.9. 1.
b.
Refer to direct support maintenance.
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