TM-9-2320-387-24-1
TRUCK, UTILITY: S250 SHELTER CARRIER, 4X4, M1113
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE, VOLUME 1
DECEMBER 1997
CHANGE 1
TM-9-2320-387-24-1 - Page 160 of 1205
TM 9-2320-387-24-l
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DIAGNOSTIC
FLOWCHART
FUEL SYSTEM
KNOWN INFO
T OPTIONS
NOTHING
IS THE FUEL SUPPLY AND
QUALITY OK?
POSSIBLE
PROBLEMS
VISUAL INSPECTION,
SAMPLED
WHILE CRANKING
OR RUNNING.
THIS QUESTION
ONLY CHECKS
THE SUPPLY OF FUEL IN THE
TANK AND TESTS TO SEE IF IT IS
GRTING
TO THE INJECTOR
PUMP. THIS IS NOT A TEST OF
FUEL PRESSURE.
FUEL LINES
FUEL FILTER
FUEL PUMP
FUEL SOLENOID
INJECTION
PUMP
INJECTORS
,ml
REASON
FOR OUESTtON
Without a supply of good fuel,
none of the components in the
fuel system can be expected to
work properly.
OPTtONS
TRY STARTlNG
ME
ENGINE.
KNOWN INFO
FUEL AVAILABLE
AND
NOT CONTAMINATED
DOES THE ENGINE START
AND STAY RUNNING?
POSSIBLE
PROBLEMS
SOLD ADVANCE
SLOW PLUGS
FUEL LINES
FUEL FILTER
FUEL PUMP
INJECTlON
PUMP
FUEL SOLENOID
REl-URN CHECK VALVE
REASON
FOR QUESTlON
:I
If it starts, you know that there is
fuel available and the fuel
solenoid is working.
r
ir
KNOWN INFO
1
TRY STARTlNG
THE ENGINE
WHILE l-l-S COLD.
FUEL SOLENOID
OK
FUEL OK
DOES THE ENGINE START
EASILY WHEN COLD?
]z
I
advance circuit.
POSSIBLE
PROBLEMS
COLD ADVANCE
FUEL LINES
FUEL FILTER
FUEL PUMP
INJECTION
PUMP
INJECTORS
2-100
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