Section 4
TM 9-2320-363-20-1
E. CODE 38. FUEL PRESSURE SENSOR (FPS) SIGNAL VOLTAGE LOW
NOTE — This chart IS only to be used if:
1 ) All basic mechanical checks and physical inspections nave been performed with no problem found, and
2) Diagnosis of DDEC-11 was started at step Start-1 (page 3-121 ) and you have now been referred here.
38.0 Check Fuel Filters
l Are fuel filters plugged?
38.1 Multiple Code Check
l Were there any other active codes
beside Code 38?
38.2 Sensor Check
l Turn ignition off.
l Disconnect FPS connector and
install a jumper wire between
sockets B and C of the FPS
harness connector.
l Turn ignition on.
l Read active codes.
l If active Code 37 or 38 exists, go
to RESULT column.
l If no active Code 37 or 38 exists.
start and run engine until either
active Code 37 or 38 appears or
the engine temperature (Mode
13 COOLANT TEMP Of 18 OIL
TEMP on DDR) has been greater
than 60 degrees C (140 deg F)
for more than 1 minute.
RESULT
I
WHAT TO DO NEXT
Replace Fuel filters, page 4-44.
Yes, any or all
Go to ENG5V-1 (page 3-333).
of the following codes:
14-15,23,35-37.
Yes - but none
Go to 38-2.
of the above.
Code 37 (and any
Check to be sure ECM and FPS
codes except Code 38).
connectors are wired properly.
If wired properly then go to 38-3.
Code 38 (and any
Go to 38-4.
other codes).
No codes.
3-283
