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Page Title:
RESISTANCE TEST |
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 TM 9-2320-364-20-1
DDEC ECM connector terminals are easily
damaged. Use care when connecting and
disconnecting connectors.
Use jumperwire only between terminals
indicated. Failure to comply may result
in damage to DDEC components or wiring.
RESISTANCE TEST
(1) Remove two mounting screws and
heat shield from DDEC ECM.
(2) Disconnect power harness
connector MC17 with connector
remover.
(3) Loosen screw and disconnect vehicle
harness connector MC18 at
DDEC ECM.
(4) Place jumperwire between terminal E1
at vehicle harness connector MC18
and terminal D at power harness
connector MC17.
(5) Are more than 5 ohms present
between wires 435 and 451 at DDL
connector MC13, terminals A and M?
(a) If there are more than 5 ohms
present, remove jumperwire and
repair wire 451 (see schematic
Fig 2-1) or notify DS Maintenance.
(b) If there are 5 ohms or less
present, wire 451 is OK. Remove
jumperwire and go to Step 3 of
this Fault.
VISUAL INSPECTION
(1) Disconnect remaining harness
connectors at DDEC ECM
(Para 7-56).
(2) Check all terminals at harness
connectors (ECM and harness side)
for damage, bent, corroded and
unseated pins or terminals.
(a) If vehicle harness connector is
damaged, repair connector (Para
7-101) and perform Steps (3)
through (5) below.
(b) If DDEC ECM connector is
damaged, replace DDEC ECM
(Para 7-56).
(c) If vehicle harness connector and
DDEC ECM connector are OK,
replace DDEC ECM (Para 7-56).
(3) Connect all harness connectors to
DDEC ECM (Para 7-56).
(4) Install heat shield and two screws.
(5) Close top engine access cover.
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