TM 5-3895-385-23-1
0051
Table 1. SPN#627, FMI#2 ― Power Supply Lost with Ignition On -- Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Power connector or engine
1. Disconnect engine interface
ECM connector pins damaged.
wiring harness connector W16
J3 from ECM (WP 0451, Vol 3,
Figure 36).
2. Inspect engine interface wiring
1. If damaged, replace engine
harness connector W16 J3 for
interface wiring harness (WP
damage.
0388, Vol 2).
2. If no damage is found, proceed
to next test.
3. Inspect engine ECM wiring
1. If damaged, replace engine
harness connector W16 J3 for
ECM (WP 0332, Vol 2).
damage.
2. If no damage is found, proceed
to next malfunction.
5. Open circuit in the battery
Measure voltage from ECM battery
1. If voltage is at least 20 VDC,
power circuit.
SUPPLY (+) pin (pin 4) of engine
proceed to malfunction 7.
interface wiring harness power
connector W16 J3 and engine
block ground (WP 0443, Vol 3 and
WP 0448, Vol 3, Figure 13).
2. If voltage is not at least 20
VDC, proceed to next
malfunction.
6. Engine interface wiring harness
1. Remove engine interface wiring
fuse fault.
harness 30 amp fuse from the
ECM battery supply positive (+)
line fuse holder (WP 0448, Vol
3, Figure 20).
2. Inspect 30 amp fuse for
1. If fuse wire is broken, replace
damage.
engine interface wiring harness
fuse (WP 0448, Vol 3, Figure
20).
2. If fuse is not damaged, reinsert
fuse into fuse holder, and
proceed to next test.
7. Resistance error in battery
1. Disconnect positive battery
supply circuit.
cable (WP 0357, Vo 2).
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