TM 5-3895-385-23-1
0034
Table 1. SPN#177, FMI#0 ― Sensed Rail Fuel Pressure Exceeds
Rail Relief Valve Opening Pressure -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. If not damaged, proceed to
next malfunction.
3. Fuel pressure sensor signal wire
1. Disconnect engine ECM wiring
or connector pins damaged.
harness connector W25 C1 from
ECM (WP 0451, Vol 3, Figure
45).
2. Inspect ECM and ECM pins for
1. If damaged, replace engine
damage.
ECM (WP 0332, Vol 2).
2. If not damaged, restore
equipment to original
condition, and proceed to
next malfunction.
4. Restricted fuel drain line.
1. Disconnect the fuel drain line
connecting the fuel pump drain
to the fuel return manifold (WP
0448, Vol 3, Figure 54).
2. Attach pressure gauge and
adapter at the high-pressure fuel
pump drain manifold (WP 0448,
Vol 3, Figure 49).
3. Start engine (TM 5-3895-385-10)
1. If fuel pressure is more than
and run at idle. Measure the fuel
2.7 pounds per square inch
return drain line pressure.
(psi) (18.6 kiloPascals (kPa)),
turn keyless engine switch to
OFF (TM 5-3895-385-10),
restore equipment to original
condition, and proceed to
next malfunction.
2. If fuel pressure is less than
2.7 psi (18.6 kPa), turn
keyless engine switch to OFF
(TM 5-3895-385-10), and
replace fuel pump actuator
(WP 0330, Vol 2).
5. Fuel pump actuator and harness
1. Disconnect engine ECM wiring
connector pins damaged.
harness connector W25 C9 from
fuel pump actuator (WP 0451,
Vol 3, Figure 46).
0034-3
