TM 5-3895-385-23-1
0037
Table 1. SPN#157, FMI#3 ― High 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).
No fault present; restore
equipment to original condition.
2. Fuel pressure sensor and circuit
1. Disconnect engine ECM wiring
fault.
harness connector W25 C6
from fuel pressure sensor (WP
0451, Vol 3, Figure 45).
2. Inspect the fuel pressure sensor
1. If damaged, replace fuel
and connector pins.
pressure sensor (WP 0337, Vol
2).
2. If not damaged, proceed to next
test.
3. Inspect the W25 engine ECM
1. If damaged, replace engine
wiring harness and rail fuel
ECM wiring harness (WP 0334,
pressure sensor connector W25
Vol 2).
C6 and connector pins for
damage.
2. If not damaged, proceed to next
malfunction.
3. Sensor supply voltage or return
1. Place a jumper wire between
circuit error.
the W25 C6 rail fuel pressure
connector RETURN pin (pin 1)
and the W25 C6 rail fuel
pressure connector rail fuel
pressure SIGNAL pin (pin 2)
(WP 451, Vol 3, Figure 1).
2. Turn keyless engine switch to
the AUX position (TM 5-3895-
385-10), but do not start engine.
Wait 30 seconds.
3. Check active engine faults
1. If fault code SPN#157, FMI#4 is
screen for fault code SPN#157,
displayed, proceed to next test.
FMI#4.
0037-3
