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 TM 9-2320-364-20-1
Allow engine to cool before performing trouble-
shooting 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.
DDR TEST
(1) Disconnect TBS harness connector.
(2) Turn ON ENGINE switch
(TM 9-2320-364-10).
(3) Start engine and run at idle.
(4) Read active codes on DDR.
(a) If code 33 and any other codes
appears on DDR, turn OFF
ENGINE switch and go to Step 5
of this Fault.
(b) If code 34 or any other code
except code 33 appear on DDR,
turn OFF ENGINE switch and go
to Step 3 of this Fault.
RESISTANCE TEST
(1) Place jumperwire between terminals A
and B at TBS harness connector.
(2) Loosen screw and disconnect engine
harness connector at DDEC ECM.
(3) Read resistance between wires 432
and 452 at engine harness connector,
terminals P1 and Y2.
(a) If there are more than 5 ohms
present, remove jumperwire and
repair wire 452 (see schematic
Fig 2-2) or notify DS Maintenance.
(b) If there are 5 ohms or less present,
wire 452 is OK.
(4) Remove jumperwire.
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