RESISTANCE TEST -726280385

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.

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.

RESISTANCE TEST

(1) Loosen screw and disconnect engine

harness connector at DDEC ECM.

(2) Read resistance between wires 109

and 110 at engine harness connector,

terminals T1 and T2.

(a) If there are 200 ohms or less

present, go to Step 4 of this Fault.

(b) If there are more than 200 ohms

present, go to Step 5 of

this Fault.

VISUAL INSPECTION

(1) Check terminals at engine harness

connector (DDEC ECM and engine

harness side) for damage; bent,

corroded and unseated pins or

terminals.

(a) If engine harness connector is

damaged, repair connector

(Para 7-101).

(b) If DDEC ECM connector is

damaged, replace DDEC ECM

(Para 7-56).

DDEC ECM connector are OK,

replace DDEC ECM

(Para 7-56).

(2) Close top engine access cover.