If an open circuit is detected in the solenoid circuit, a
diagnostic code is generated. The ECM continues to
try to fire the injector. If a short circuit is detected, a
diagnostic code is generated. The ECM will
periodically try to fire the injector. If the short circuit
remains, this sequence of events will be repeated
until the fault is corrected.
Illustration 32
g03616577
Schematic of the circuit for the injector solenoids
Not all connectors are shown. Refer to the electrical schematic for the engine.
Illustration 33
g02373637
Typical example of the harness connector for the fuel
injectors
Illustration 34
g02373216
(1) Cylinder 3 injector supply
(2) Cylinder 2 injector supply
(16) Cylinder 1 injector supply
(17) Cylinder 4 injector supply
(31) Cylinder 3 injector return
(32) Cylinder 1 injector return
(46) Cylinder 2 injector return
(48) Cylinder 4 injector return
Electrical Shock Hazard. The electronic unit injec-
tors use DC voltage. The ECM sends this voltage
to the electronic unit injectors. Do not come in
contact with the harness connector for the elec-
tronic unit injectors while the engine is operating.
Failure to follow this instruction could result in
personal injury or death.
UENR0612
151
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