Benelli ZAFFERAN 250, Service Manual

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17. Electronic Fuel Injection System
Electronic Fuel Injection System------------------------------------17.1
Components of Electronic Fuel Injection System--------------17.2
Failure Diagnosis-------------------------------------------------------17.3
Common Troubleshooting--------------------------------------------17.4
17.1 Introduction of Electronic Fuel Injection System
ZAFFERANO adopts the small-scale engine electronic fuel injection system manufactured by
Delphi Company, which is controlled with oxygen sensors within a closed loop. The three-way
catalytic converter would go through treatment with the gas after combustion in the engine, turn it
into harmless gas and release it into the air. This system adopts the closed-loop independent
function that can efficiently eliminate the manufacturing differences within the system and the
other corresponding components, highly improving the integrity of the motorcycle, which can also
reduce the deviations of the motorcycle after some time of actual use.
Notice:
Please power off and stop the fuel pump before disconnecting the high pressure fuel hose, and
make sure the oil channel is closed. When disconnecting the fuel hose, be careful not to pollute
the electronic component due to fuel spills.
Gasoline is a flammable and combustible liquid, so the operation shall be carried out in such a
place with good ventilation
Cut off the power switch before removing the sensor plug.
The operation shall be carried out in a place with good ventilation, so that the electronic component
may not be corroded by water.
After the removal of throttle, certain measures shall be taken to prevent the entrance of foreign objects.
Use proper force to remove the socket of electronic component, or the electronic component may be
broken.
Failure Diagnostic
Abnormal start, start failure, flameout, unstable idling
Fuel pump failure Blocked fuel pipe Fuel pump failure
Blocked gasoline filter; ECU data problem; improper gas
mixture
Blocked gasoline pipe Gas leakage in the conjunction of air inlet
cracked pipe of air sensor Clogged fuel injector Poor position of idling bolt
ECU data problem sensor
failure sensor failure
Too much fuel in engine rarefied gas mixture
Fuel injector leakage blocked fuel injector
Over high pressure in oil pipe
over low
pressure in fuel pipe Secondary air inlet in fuel system
ECU data problem Bad fuel sensor failure
ECU data problem air inlet system leakage
Ignition system failure
Blocked air filter