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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.
RESISTANCE TEST
(1) Connect vernier harness connector to
VERNIER CONTROL
the vernier control.
HARNESS CONNECTOR MC38
(2) Loosen screw and disconnect vehicle
harness connector MC18 at
DDEC ECM.
(3) Read resistance between terminals
A3 and C3 on vehicle harness
connector MC18.
(a) If 8,700 to 9,100 ohms are not
present, go to Step 7 of this
Fault.
(b) If 8,700 to 9,100 ohms are present,
go to Step 4 of this Fault.
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