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 TM 9-2320-364-20-1
Allow engine to cool before performing trouble-
shooting maintenance. If necessary use
insulated pads and gloves. Hot engine
components will burn and cause injury to
personnel.
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.
DDEC ECM connector terminals are easily damaged.
Use care when connecting and disconnecting connectors.
VOLTAGE TEST
(1) Connect positive (+) multimeter lead
to vernier control harness connector
MC38, terminal A.
(2) Connect negative (- ) multimeter lead
-
to vernier control harness connector
MC38, terminal C.
(3) Turn ON ENGINE switch
(TM 9-2320-364-10).
(a) If there are 4.5 vdc or more
present, turn OFF ENGINE switch
and repair wire 952 (see
schematic Fig 2-1) or notify DS
Maintenance.
(b) If there are less than 4.5 vdc
present, wire 952 is OK.
(4) Connect vernier control harness
connector MC38.
(5) Install instrument panel and sunshield
with ten screws.
(6) Turn OFF ENGINE switch.
VISUAL INSPECTION
(1) Loosen screw and disconnect vehicle
harness connector MC18 from
DDEC ECM.
(2) Check terminals at vehicle harness
connector MC18 (DDEC ECM and
harness side) for damage; bent,
corroded and unseated pins or
terminals.
(a) If harness connector is damaged,
repair connector (Para 7-101) and
perform Steps (3) through (5)
below.
(b) If DDEC ECM connector is
damaged, replace DDEC ECM
(Para 7-56).
(c) If DDEC harness and ECM
connectors are OK, replace DDEC
ECM (Para 7-56).
(3) Connect vehicle harness connector
MC18 and tighten screw.
(4) Install instrument panel and sunshield
with ten screws.
(5) Close top engine access cover.
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