PIAGGIO 2005 XEVO 400ie, Workshop Manual

Page: 180 / 376

Possible Cause Operation
Fuel supply Fuel pressure
Fuel filter
Injector capacity
Fuel quality
Selection of the cylinder base gasket thickness Selection of the cylinder base gasket thickness
Decoder master-box circuit
This section describes the operations to be carried out to check the power supply circuit.
Constant supply circuit check
The decoder basic power supply is necessary for the deterrent flashing management. The injection
control unit power supply is necessary for the Stepper motor management.
A power supply failure disables both ignition and injection.
In case of power supply faults, the diagnostic tester gives the information "NO REPLY FROM THE
CONTROL UNIT".
To carry out the check, proceed as follows:
Specific tooling
020680Y Diagnosis Tool
1 - Check whether the immobiliser system LED in-
dicates that the switch is in position " ON " and that
the deterrent flashing is on.
YES go to 2 NO go to 7
2 - The decoder is properly programmed.
YES go to 3
3 - Switch set to " ON " with side stand raised and
emergency switch set to " OFF ". The injection tell-
tale light turns on for about 3 seconds.
YES go to 5 NO go to 4
4 - Check the instrument unit and its power supply.
YES go to 3
5 - Set the emergency switch to " RUN ". The injection telltale light comes on for about 5 seconds.
YES go to 6 NO go to 7
6 - The injection control unit is certainly powered.
7 - Check that fuses No. 6 and 11 are in good conditions.
YES go to 10 NO go to 8
Injection
XEVO 400ie
INJEC - 180