RESISTANCE TEST -726280275

TM 9-2320-364-20-1

Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts positive electrical circuits,

a direct short may result. Damage to equipment, injury or death to personnel may occur.

Allow engine to cool before performing trouble-

shooting maintenance. If necessary use insulated

pads and gloves. Hot engine components will burn

and cause personnel injury.

DDEC ECM connector terminals are easily

damaged. Use care when connecting and

disconnecting connectors.

RESISTANCE TEST

(1) Remove jumperwire from OTS

connector.

(2) Loosen screw and disconnect engine

harness connector at DDEC ECM.

(3) Read resistance between terminals

R2 and W1 on engine harness

connector.

(a) If there are less than 10,000 ohms

present, repair wires 120, 416

and/or 452 (see schematic

Fig 2-2) or notify DS

Maintenance.

(b) If there are more than 10,000

ohms present, go to Step 3 of

this Fault.

VISUAL INSPECTION

(1) Check OTS and terminals at OTS

connector (Both sensor and harness

side) for damage; bent, corroded and

unseated pins or terminals.

(a) If connectors or terminals are

damaged, repair connectors or

terminals (Para 7-101).

(b) If connectors and terminals are

free of damage, replace OTS

(Para 7-66).

(2) Connect engine harness connector to

DDEC ECM and tighten screw.

(3) Install engine access panel with 22

screws, washers and lockwashers.