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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.
(1) Loosen screw and disconnect engine
harness connector from DDEC ECM.
(2) Remove jumperwire.
(3) Read resistance between wires 472
and 416 at engine harness connector,
terminals R3 and W1.
(a) If there are less than 10,000 ohms
present, repair wires 472, 416
and/or 452 (see schematic
Fig 2-2) or notify DS Maintenance.
(b) If there are more than 10,000
ohms present, wires are OK, go to
Step 3 of this Fault.
VISUAL INSPECTION
(1) Check terminals at FTS harness
connector (sensor and harness side)
for damage; bent, corroded and
unseated pins or terminals.
(a) If terminals are damaged, repair
connector (Para 7-101) or notify DS
Maintenance.
(b) If terminals are not damaged,
replace FTS (Para 7-62) and
perform Steps (2) and (3) below.
(2) Connect FTS harness connector.
(3) Connect engine harness connector to
DDEC ECM and tighten screw.

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