TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PUMP UNIT
1. GASOLINE ENGINE FAILS TO START OR RUNS POORLY.
Step 1. Check fuel tank for enough fuel.
Refill fuel tank if necessary.
Step 2. Refer to troubleshooting in TM 5-2805-259-14.
Refer to maintenance in TM 5-2805-259-14.
Step 3. Check operation of oil pressure switch (S2) by disconnecting connector plug at engine,
and measuring open circuit from TB1-B to TB1-F. Reconnect connector plug when
finished.
If continuity (zero ohms) is indicated with switch pressed, replace S2 switch.
Step 4. Check oil pressure switch (S2) (1 ) to
make sure it is properly mounted and
has not rotated and is shorting out the
terminals.
Resecure S2 switch and make
sure no metal objects touch
terminals.
Step 5. Check fuel hoses (2) to see if they are
leaking.
Tighten hose clamp, if installed,
or replace with new hoses.
Step 6. Check battery charge (refer to
TM 9-6140-200-14).
Service battery (refer to
TM 9-6140-200-14).
2-19
TM 3-4230-209-20&P
