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ELECTRONIC FUEL INJECTION (EFI)
SERVICE TOOLS
Description
ECM ADAPTER TOOL...................................................................
FLUKE 115 MULTIMETER ............................................................
OETIKER PLIERS...........................................................................
SERVICE PRODUCTS
Description
LOCTITE 243 (BLUE).....................................................................
XPS SYNTHETIC GREASE.............................................................
GENERAL
WARNING
Fuel is flammable and explosive under cer-
tain conditions. Ensure work area is well ven-
tilated. Do not smoke or allow open flames or
sparks in the vicinity.
WARNING
Fuel lines remain under pressure at all times.
Always proceed with care and use appropri-
ate safety equipment when working on pres-
surized fuel system. Wear safety glasses.
Wipe off any fuel spillage. Do not allow fuel
to spill on hot engine parts and/or on electri-
cal connectors.
WARNING
Replace any damaged, leaking or deteri-
orated fuel lines or connections. Always,
pressurize the fuel system if any fuel related
component was disconnected or removed.
Proceed with care when removing/installing
high pressure test equipment.
SYSTEM DESCRIPTION
Refer to the appropriate
SYSTEM
subsection for a general layout of the
various EFI system components.
The electronic fuel injection system (EFI) is com-
prised of various sensors used for detecting ongo-
ing operating conditions of the engine and vehicle,
and includes all the components that perform the
required adjustments to the engine.
vmr2016-423
Subsection 01 (ELECTRONIC FUEL INJECTION (EFI))
ENGINE MANAGEMENT
Part Number
529 036 166 ............................................. 5
529 035 868 ............................................. 5
295 000 070 ........................................... 10
Part Number
293 800 060 ............................... 10, 16, 21
293 550 010 ........................................... 18
Electrical System
ECM (Electronic Control Module)
The ECM controls the electrical system and the
engine management functions, by processing the
information given by various sensors.
EFI Sensors
The ECM reads the inputs from the sensors
which it compares to predetermined parameters
stored in the ECM, makes computations, and ac-
tivates the outputs accordingly (injectors, ignition
coils etc.).
Signals from sensors are used by the ECM to de-
termine the injection and ignition parameters (ref-
erenced to fuel maps) as required to maintain the
optimum air-fuel ratio.
Air Intake System
AIR INTAKE SYSTEM
Refer to the applicable
section for additional information.
Throttle Body
The throttle body is mounted on the intake mani-
fold.
Air for combustion, drawn in by the engine, flows
through the air intake system, then through the
throttle body where it is regulated by a throttle
plate.
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