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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
troubleshooting maintenance. If necessary
use insulated pads and gloves. Hot engine
components will burn and cause personnel
injury.
NOTE
Troubleshooting procedures for codes 71
through 78 are the same for codes 61
through 68.
SIGNAL TEST
(1) Connect two injector harness
connectors to DDEC ECM.
(2) Looking at injector with disconnected
wires, reattach injector drive wire
(Fig 2-4).
(3) Connect one lead of test light to the
common side of the injector.
(4) Connect the second test light lead to a
known good ground.
(5) While an assistant cranks the engine
(TM 9-2320-364-10), observe the test
light.
(a) If the test light does light steady
or flashes, turn OFF ENGINE
switch and notify DS
Maintenance.
(b) If the test light does not flash or
light steady, injector is OK.
(6) Turn OFF ENGINE switch.
(7) Connect wire 619 or wire 620 to
injector.
VISUAL INSPECTION
(1) Disconnect both injector harness
connectors at the DDEC ECM with
connector remover.
(2) Check terminals at both harness
connectors (harness and DDEC ECM
sides) for damage; bent, corroded
and unseated pins or terminals.
(a) If connectors are damaged, repair
connectors (Para 7-101).
(b) If DDEC ECM connector terminals
are damaged, replace
DDEC ECM (Para 7-56).
(c) If connectors are free of damage,
go to Step 10 of this Fault.
(3) Connect both injector harnesses.
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