RESISTANCE TEST -726280317

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.

RESISTANCE TEST

(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.