TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
INJECTOR SOLENOID CIRCUIT TEST - CONTINUED
Expected Results. ET displays "Short" for cylinder with jumper wire and "Open" when jumper wire is removed.
m.
(1)
If results are OK, use a multimeter to check resistance of suspect injector solenoid. Correct resistance of
each injector solenoid is 1.06 0.05 Ohms. If resistance of solenoid is not within specifications, replace
faulty injector (WP 0187 00). Verify problem is resolved. If resistance is within specifications, problem
may be intermittent. If problem is intermittent, refer to Electrical Connector Inspection (WP 0022 00).
Verify repair eliminates problem.
(2)
If results are not OK, ET did not display correct status during test. There is a problem with injector harness
under valve cover. There may be a problem with a connector. Replace wiring harness in question (WP
0195 00 thru WP 0201 00). Ensure seals are properly in place and connectors are securely connected. Ver-
ify problem is resolved.
9.
Check ECM for Proper Operation
WARN I N G
Electronic fuel injector system uses 90 to 120V. Do not touch any components during testing. Failure to fol-
low warning may result in injury to personnel or damage to equipment.
a.
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
b.
Fabricate a jumper that is long enough to reach from P2 ECM connector to engine ground stud. Crimp a socket ter-
minal to one end of jumper wire.
c.
Disconnect P2 connector.
d.
Remove supply wire for suspect injector from ECM connector.
e.
Install jumper wire into socket.
f.
Connect J2/P2 ECM connector.
g.
Verify that ECM will detect an open circuit for suspect injector:
(1)
Ensure that jumper wire is not in contact with a ground source or another circuit. Do not touch jumper wire
during test. A strong electrical shock hazard is present at jumper wire while test is running.
(2)
Place battery disconnect switch in ON position (TM 5-3805-291-10).
(3)
Perform injector solenoid test at least two times.
(4)
Place battery disconnect switch in OFF position (TM 5-3805-291-10).
(5)
ET displays "Open" for two injectors that share supply wire.
0013 00-61
