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TM 9-2320-360-34-1
INJECTOR TEST
(1) Turn ENGINE switch to OFF.
(2) Disconnect injector drive line (wire no. 611 thru
618 depending on cylinder) from injector
identified by code (61-68).
(3) Disconnect injector drive line and return line
from a nearby injector that is operating
properly.
(4) Remove injectors (para 4-2) from cylinder
identified by code (61-68) and from cylinder in
which drive line and return line were
disconnected.
(5) Swap injectors. (Install injector (para 4-2)
identified by code (61-68) in cylinder that was
firing properly. Install injector that was
operating properly in cylinder that was
misfiring.)
(6) Clear codes on DDR.
(7) Start engine (TM 9-2320-360-10) and warm
to normal operating temperature or until
CHECK ENGINE indicator lights.
(8) Stop engine (TM 9-2320-360-10).
(9) Read historical codes on DDR.
Check terminals at both 5-way, injector harness
connectors (both harness and ECM sides) for damage;
bent, corroded and unseated pins or sockets.
Check for any of the following problems:
Air in fuel or low fuel pressure
Sticky valve
Cold fuel
Low battery charge
Broken spring or armature on the injector
Problems in the charging system (loose alternator belt,
etc.) or bad grounds
Signs of insulation wear on injector harness.
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