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TM 9-2320-364-20-2
2-1014
1. ENGINE CRANKS BUT FAILS TO START OR STALLS AFTER STARTING.
INITIAL SETUP
1.
Go to Step 2 of this
Fault.
START
NO
Headlights operate indicating
22 to 28 vdc present at
1020/1872 splice at ignition
switch.
Fuel priming pump circuit
breaker not tripped indicating
no shorts in capacitor pack to
fuel priming pump.
22 to 28 vdc not supplied to fuel
priming pump.
Fuel priming pump not
grounded.
Fuel priming pump capacitor
faulty.
22 to 28 vdc not supplied to
connector MC108 at wire 1020.
Connector MC108 at wire 1435
not grounded.
22 to 28 vdc not supplied to
wire 1020 at fuel priming pump
circuit breaker.
22 to 28 vdc not supplied to
wire 1020 at DUVAC.
Fuel tank(s), hoses and/or
fittings loose, damaged or
leaking.
Fuel priming pump filter faulty.
Fuel priming pump faulty.
Fuel water separator faulty.
Fuel pump faulty.
Secondary fuel filter faulty.
Fuel contaminated.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Audible inspection.
If fuel priming pump can be
heard when ENGINE switch is
in the ON position, the problem
is not electrical.
2-17. FUEL SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Pan, Drain (Item 46, Appendix G)
Personnel Required
Two
Equipment Condition
Engine off, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Materials/Parts
Lockwashers (26) (Item 195, Appendix F)
Gasket (Item 63, Appendix F)
Can fuel priming pump be
heard when ENGINE switch is
in ON position?
Go to Step 9 of this
Fault.
YES
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