DDR TEST -726280347

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.

NOTE

If no codes appear on DDR, start engine

and run until either the CEL comes ON or

the engine has been running at 120 to 160F

(49 to 71C) for at least one minute at greater

than 1,000 RPM.

DDR TEST

(1) Disconnect TBS harness connector.

(2) Place jumperwire between terminals

B and C at TBS harness connector.

(3) Turn ON ENGINE switch

(TM 9-2320-364-10).

(4) Select MODE 01 (ACTIVE CODES)

on DDR.

(5) Are codes 33 and/or 34 displayed

on DDR.

(a) If code 34 and any other is

displayed on DDR, turn OFF

ENGINE switch and go to Step 4

of this Fault.

(b) If code 33 and any other code

except code 34 is displayed on

DDR, turn OFF ENGINE switch

and go to Step 3 of this Fault.

(6) Remove jumperwire from TBS

harness connector.