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 TM 9-2320-364-20-1
Remove all jewelry such as rings, dog tags, bracelets,
etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to
equipment, injury or death to personnel may occur.
Allow engine to cool before performing trouble-
shooting maintenance. If necessary use insulated
pads and gloves. Hot engine components will burn
and cause personnel injury.
VOLTAGE TEST
(1) Set multimeter select switch to volts
dc.
(2) Turn ON ENGINE switch
(TM 9-2320-364-10).
(3) Are there 10 to 14 vdc present
between wire 439 at vehicle harness
connector MC18, terminal B3 and a
known good ground?
(a) If less than 10 vdc are present,
turn OFF ENGINE switch and
repair wire 439 (see schematic
Fig 2-1) or notify DS Maintenance.
(b) If there is 10 to 14 vdc present,
turn OFF ENGINE switch and go
to Step 5 of this Fault.
VOLTAGE TEST
(1) Remove two screws and heat shield
from DDEC ECM.
(2) Disconnect power harness
connector MC17 with connector
remover.
(3) Set multimeter select switch to
volts dc.
(4) Turn ON ENGINE switch
(TM 9-2320-364-10).
(5) Are there 10 to 14 vdc present
between wire 241 at power harness
connector MC17, terminal A and B
and a known good ground?
(a) If less than 10 vdc are present,
turn OFF ENGINE switch and
repair wire 241 (see schematic
Fig 2-3) or notify DS Maintenance
and perform Steps (7)
and (8) below.
(b) If 10 to 14 vdc are present, turn
OFF ENGINE switch and perform
Step (6) below.
(6) Are there 10 to 14 vdc present
between wire 240 at power harness
connector MC17, terminal E and F
and a known good ground?
(a) If less than 10 vdc are present,
turn OFF ENGINE switch and
repair wire 240 (see schematic
Fig 2-3) or notify DS Maintenance
and perform Steps (7)
and (8) below.
(b) If 10 to 14 vdc are present, wire
240 is OK. Turn OFF ENGINE
switch, perform Steps (7) and (8)
below and go to Step 6 of
this Fault.
(7) Connect power harness
connector MC17.
(8) Install heat shield and two
mounting screws.
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