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
2. If fault code SPN#157, FMI#3 is
not displayed, turn keyless
engine switch to the OFF
position (TM 5-3895-385-10),
and proceed to next
malfunction.
5. Restore equipment to original
condition.
6. Turn keyless engine switch to
the AUX position (TM 5-3895-
385-10), but do not start engine.
Wait 30 seconds.
7. Check active 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), and replace
the rail fuel pressure sensor
(WP 0337, Vol 2).
2. If fault code SPN#157, FMI#4 is
not displayed, turn keyless
engine switch to the OFF
position (TM 5-3895-385-10).
No fault present; restore
equipment to original condition.
4. ECM or engine ECM wiring
1. Disconnect engine ECM wiring
harness fault.
harness connector W25 C1
from engine ECM (WP 0451,
Vol 3, Figure 45).
2. Inspect engine ECM wiring
1. If damaged, replace engine
harness connector W25 C1 and
ECM wiring harness (WP 0334,
connector pins for damage.
Vol 2).
2. If not damaged, proceed to next
test.
3. Inspect engine ECM connector
1. If damaged, replace engine
and connector pins for damage.
ECM (WP 0332, Vol 2).
2. If not damaged, proceed to next
test.
4. Turn keyless engine switch to
the AUX position (TM 5-3895-
385-10), but do not start engine.
0038-4
