VISUAL INSPECTION -726280249

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 Step (2) below.

(b) If DDEC ECM connector is

damaged, replace DDEC ECM

(Para 7-56).

(2) Connect vehicle harness connector

MC18 to DDEC ECM and tighten

screw.

RESISTANCE TEST

(1) Loosen screw and disconnect vehicle

harness connector MC18 from DDEC

ECM.

(2) Read resistance between terminals

A3 and C3 on vehicle harness

connector MC18.

(a) If there are less than 10,000

ohms, present, repair wires 916

and/or 952 (see schematic

Fig 2-1) or notify DS Maintenance.

(b) If there are more than 10,000

ohms present, go to Step 6 of this

Fault.