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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
terminals.
VISUAL INSPECTION
(1) 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 (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
MC18 to DDEC ECM and
tighten screw.
(3) Close top engine access cover.
VERIFY REPAIR
(1) Turn ON ENGINE switch
(TM 9-2320-364-10).
(2) Clear codes on DDR (Para 2-11).
(3) If CEL does not stay ON, start engine
and run for 8 minutes or until CEL
comes ON.
(a) If CHECK ENGINE light comes on
for about five seconds and then
goes off, fault has been corrected.
Perform Steps (4) and (5) below.
(b) If CHECK ENGINE light comes on
and stays on, perform Steps (4)
and (5) below and go to Fault
Index (Table 2-16).
(4) Turn OFF ENGINE switch.
(5) Disconnect DDR from DDL connector
MC13.
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