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 TM 9-2320-364-20-1
Allow engine to cool before performing
troubleshooting 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.
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 vehicle 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 vehicle harness connector and
DDEC ECM connector are OK,
replace DDEC ECM (Para 7-56).
(2) Connect vehicle harness connector
MC18, and tighten screw.
(3) Close top engine access cover.
VERIFY REPAIR
(1) Turn ON ENGINE switch
(TM 9-2320-364-10).
(2) 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 Step (3) below.
(b) If check engine light comes on
and stays on, perform Step (3)
below and go to Fault
Index (Table 2-16).
(3) Turn OFF ENGINE switch.
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