TM 5-3895-385-23-1
0038
Table 1. SPN#157, FMI#4 ― Low Signal Voltage at Rail Fuel Pressure Sensor Circuit -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Measure the voltage between
1. If voltage is between 4.75 VDC
the rail fuel pressure +5 volt
and 5.25 VDC, turn keyless
SUPPLY pin (pin 37) to the rail
engine switch to the OFF
fuel pressure RETURN pin (pin
position (TM 5-3895-385-10),
47) at the ECM engine
restore equipment to original
connector (WP 0443, Vol 3 and
condition, and proceed to next
WP 0448, Vol 3, Figure 2).
test.
2. If voltage is not between 4.75
VDC and 5.25 VDC, turn
keyless engine switch to the
OFF position (TM 5-3895-385-
10), and replace the engine
ECM (WP 0332, Vol 2).
6. Turn keyless engine switch to
the AUX position (TM 5-3895-
385-10), but do not start engine.
Wait 30 seconds.
7. Check inactive engine faults
1. If fault code SPN#157, FMI#4 is
screen for fault code SPN#157,
displayed, turn keyless engine
FMI#4.
switch to the OFF position (TM
5-3895-385-10). No fault
present; restore equipment to
original condition.
2. If fault code SPN#157, FMI#4 is
not displayed, turn keyless
engine switch to the OFF
position (TM 5-3895-385-10),
and replace the engine ECM
wiring harness (WP 0334, Vol
2).
END OF WORK PACKAGE
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