RESISTANCE TEST -726280353

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.

DDEC ECM connector terminals are easily damaged. Use care when connecting and disconnecting

connectors.

RESISTANCE TEST

(1) Remove jumperwire.

(2) Read resistance between terminals A

and B at TBS harness connector.

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

present, repair wires 432 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)

below.

(3) Read resistance between terminal B

at TBS harness connector and a

known good ground.

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

present, repair wire 432 (see

schematic Fig 2-2) or notify DS

Maintenance.

(b) If there are more than 10,000

ohms present, wires 432 and 452

are OK.

VISUAL INSPECTION

(1) Check terminals at engine harness

connector (DDEC ECM and harness

side) for damage; bent, corroded and

unseated pins or terminals.

(a) If harness connectors are

damaged, repair connectors

(Para 7-101) and perform Step (2)

below.

(b) If DDEC ECM connector is

damaged, replace DDEC ECM

(Para 7-56).

connectors are OK, replace

DDEC ECM (Para 7-56).

(2) Close top engine access cover.