TM 5-3805-262-20
3-5. FUEL SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LOW FUEL PRESSURE (Cont) .
S t e p 8 . ( C o n t ).
Compressed air used for cleaning purposes will not exceed 30 psi. Use
o n l y w i t h e f f e c t i v e c h i p g u a r d i n g a n d p e r s o n a l p r o t e c t i v e e q u i p m e nt
( g o g g l e s / s h i e l d , g l o v e s , e t c ) . F a i l u r e t o d o s o c o u l d c a u s e s e r i o us
i n j u r y t o e y e s a n d p o s s i b l e b l i n d n e s s .
If you hurt your eyes or if a
f o r e i g n o b j e c t i s b l o w n i n t o y o u r e y e s , s e e k m e d i c a l a t t e n t i o n
immediately.
t o
a. If pressure gage indicates 3.2 to 9 psi, use compressed air
clear blockage from fuel supply hose.
Disconnect pressure gage and elbow from electric fuel pump port.
Reinstall elbow and fuel supply hose between elbow and fuel in-
jection pump feed pump.
Reinstall engine right side panels (page 9-17).
b. If pressure gage does not indicate 3.2 to 9 psi, go to step 9
below.
Step 9.
Disconnect electric fuel pump terminal from wiring harness terminal.
Do this by grasping terminals with your fingers and firmly pulling
a p a r t .
Connect multimeter between
wiring harness terminal and
chassis ground.
T e l l a s s i s t a n t t o t u r n i g n i t i o n
key switch to on position.
Multimeter should indicate 24
volts .
T e l l a s s i s t a n t t o t u r n i g n i t i on
key switch to off position.
Disconnect multimeter.
a. If multimeter indicates 24 volts,
reconnect electric fuel pump
terminal and wiring harness terminal. Do this by grasping ter-
minals with fingers, alining, and firmly pushing together.
Go to step 10 below.
b. If multimeter does not indicate 24 volts, depress 5 ampere
circuit breaker on right instrument panel and repeat this step.
If multimeter still does not indicate 24 volts, check for open
circuit between wiring harness terminal and ignition key switch.
Repair or replace wire as necessary (page 5-168 or 5-174).
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