Benelli ZAFFERAN 250 - 17.2.9.6 Failure Diagnosis of Fuel Pump Assembly

170
Procedures" after maintenance.
● Check and make sure there is enough fuel within the fuel tank when the pump is running
after maintenance.
17.2.9.6 Failure Diagnosis of Fuel Pump Assembly
Step
Procedure
Yes
No
1
Start the ignition key and run the fuel
pump
for 3 seconds.
If the fuel pump starts
to run, refer to step 4.
If the fuel pump fails
to run, refer to step 2.
2
Disconnect the connector of the pump
and check whether the power supply
voltage is among the scope of 10V and
14V.
Refer to step 3.
Check the power
circuit of fuel pump.
3
Supply 12V DC to the fuel pump;
Make sure there is enough fuel within the
tank in case of dry running;
Fuel pump runs or not？
1. check the loop
from fuel pump to
ECU;
2. check the ECU.
1. check fuel
pump
harness;
2. check the fuel pump.
4
Check whether the front supply pressure
of the nozzle is within the scope of
220kPa and 270kPa when the engine is
at idle.
The fuel pump
assembly runs
normally.
Refer to step 5.
5
Check whether the pressure is lower
than 220kPa
1. check if there is
leakage on the fuel
pipe;
2. check the fuel pump
set;
3. check the pressure
adjuster;
1. fuel filter is blocked;
2. the fuel pipe
is kinked;
3. check the
pressure regulator.
17.2.9.7 Removing the Fuel Pump Assembly
● refer to the chapter "Fuel Pressure Release Procedures" and release the fuel pressure;
● disconnect the negative terminal of the battery;
● cut off the connecter of the fuel pump assembly harness;
● remove the residual fuel within the tank and store it in an appropriate container for
security and pollution protection;
● remove the connection fuel hose from the pump to the assembly with standard tools;
● remove the fuel tank from the motorcycle;
● set the fuel tank reverse in case of scratch or damage;
● be careful not to break the strainer.
17.2.9.8 Installation of the Fuel Pump Assembly
● change the seal of the fuel pump assembly (a used seal could cause fuel leakage).
● fold the strainer and put the installation screws of the assembly asymmetrically, which can
only be installed in compliance with regulated directions. The pressure adjuster face shall
be pointed to the back of the fuel tank to make sure installation face is clean and neat.
● install the screws on the cover plate of the fuel pump and screw them down in compliance
with Fig.