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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.
Use jumperwire only between terminals
indicated. Failure to comply may result in
damage to DDEC components or wiring.
VISUAL INSPECTION
(1) Check terminals at vehicle harness
connector (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 (2) and (3)
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).
(2) Connect vehicle harness connector to
DDEC ECM and tighten screw.
(3) Close top engine access cover.
RESISTANCE TEST
(1) Loosen screw and disconnect vehicle
harness connector MC18.
(2) Place a jumperwire between terminals
A and C on TPS harness connector.
(3) Read resistance between wires 916
and 952 at vehicle harness connector
MC18, terminals A3 and C3.
(a) If there are more than 5 ohms
present, repair wires 916 and/or
952 (see schematic Fig 2-1) or
notify DS Maintenance and
perform Steps (4) through (7).
(b) If there are 5 ohms or less
present, wires 916 and 952
are OK.
(4) Remove jumperwire.
(5) Connect TPS connector.
(6) Connect vehicle harness connector
MC18 to DDEC ECM and tighten
screw.
(7) Close top engine access cover.
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