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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.
Use jumperwire only between terminals
indicated. Failure to comply may result in
damage to DDEC components or wiring.
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) Place jumperwire between terminals
A and C at TBS harness connector.
(3) Read resistance between wires 416
and 452 at engine harness connector,
terminals W1 and Y2.
(a) If there are more than 5 ohms
present, repair wires 416 and/or
452 (see schematic Fig 2-2) or
notify DS Maintenance and
perform Steps (4) through (7)
below.
(b) If there are 5 ohms or less
present, wires 416 and 452 are
OK, perform Steps (4) through (7)
below and go to Step 9 of this
Fault.
(4) Remove jumperwire from TBS
harness connector.
(5) Connect TBS harness connector.
(6) Connect engine harness connector to
DDEC ECM and tighten screw.
(7) Close top engine access cover.
VERIFY REPAIR
(1) Turn ON ENGINE switch
(TM 9-2320-364-10).
(2) Clear codes on DDR (Para 2-24).
(3) If CEL does not stay ON, start engine
and run for 8 minutes or until CEL
comes ON.
(a) If CHECK ENGINE light comes on
for about five seconds and then
goes off, fault has been corrected.
Perform Steps (4) and (5) below.
(b) If CHECK ENGINE light comes on
and stays on, perform Steps (4)
and (5) below and go to Fault
Index (Table 2-16).
(4) Turn OFF ENGINE switch.
(5) Disconnect DDR from DDL connector
MC13.
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