VISUAL INSPECTION -726280487

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.

Use jumperwire only between terminals

indicated. Failure to comply may result

in damage to DDEC components or wiring.

DDEC ECM connector terminals are easily

damaged. Use care when connecting and

disconnecting connectors.

NOTE

The following steps should only be used if

troubleshooting was started at DDEC II

Troubleshooting (All Conditions) and you

were referred here.

VISUAL INSPECTION

(1) Loosen screw and disconnect vehicle

harness connector MC18 at

DDEC ECM.

(2) Place jumperwire between terminal B1

on vehicle harness connector MC18

and a known good ground.

(3) Turn ON ENGINE switch

(TM 9-2320-364-10).

(4) Observe CEL.

(a) If CEL does come ON, perform

Steps (5) and (6) below and go to

Step 5 of this fault.

(b) If CEL does not come ON,

perform Steps (5) and (6) below

and go to Step 3 of this fault.

(5) Turn OFF ENGINE switch.

(6) Remove jumperwire.