PCM 2003 5.0L MPI, Руководство по эксплуатации и техническому обслуживанию владельца

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L510010-03
C.C.
ELECTRONIC FUEL INJECTION INFORMATION - 4
ELECTRONIC FUEL INJECTION SYSTEM
The PCM engines covered in this manual are equipped
with an Electronic Fuel Injection (EFI) system, which
allows precise control of fuel and spark delivery. The fuel
system components of the EFI system are:
• The electric fuel pump
• The throttle body assembly
• The fuel injectors
The fuel injection system is controlled by an Electronic
Control Module (ECM). The ECM is the decision
center of the system. The ECM constantly monitors
information from various sensors on the engine, and
electronically processes the information, in order to
control ignition timing and fuel delivery for optimum
performance and fuel economy. The ECM incorporates
an engine overspeed protection, calibrated to a specifi c
RPM, to prevent engine damage from over-revving.
The sensors that the ECM monitors are:
• Engine Coolant Temperature (ECT) Sensor
• Throttle Position (TP) Sensor
• Manifold Absolute Pressure (MAP) Sensor
• Knock Sensor (KS) System
• Crankshaft Positioning (CKP) Sensor
• Camshaft Positioning (CMP) Sensor
• Intake Air Temperature (IAT) Sensor
POWER REDUCTION MODE
The ECM monitors engine oil pressure and engine
coolant temperature whenever the engine is running.
If either one of these inputs indicate an abnormal
reading, the system will go into “Power Reduction” mode,
followed by the illumination of an indicator lamp and/or
sounding of the warning buzzer (if equipped). This is a
feature that will help protect the engine during an over-
temp or low oil pressure condition.
When in “Power Reduction” mode, the ECM will allow
normal engine performance up to 2000 RPM. Above
2000 RPM, the ECM allows fuel delivery through only
half of the fuel injectors. Once the RPM is brought down
below 1200 RPM, normal engine operation is restored
until the RPM exceeds 2000 RPM. The feature allows
maneuverability of the boat while removing the possibility
of high engine speed operation until the problem is
corrected.
NOTICE: If it is not possible to safely shut off the engine,
return the engine to idle speed. Once returned to idle,
the ECM will allow the engine to operate normally below
2000 RPM.