APRILIA SHIVER 900, Service Station Manual

Page: 157 / 444

Injector
Function
Provide the correct amount of fuel at the correct
time.
Operation / Operating principle
Injector coil is energised for the petrol passage to
open
Level in electrical circuit diagram:
Coils and injectors
Position:
•
on the vehicle: on the throttle body
•
connector: on injectors
Electrical specifications:
12.5
Ω
± 10% (at ambient temp.)
Pin out:
•
"+": supply
•
" ": ground
DIAGNOSTIC TOOL:PARAMETERS
Cylinder injection time 1
•
Example value with engine on: 1.9 ms
Cylinder injection time 2
•
Example value with engine on: 1.9 ms
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTIC TOOL: ACTIVATIONS
Front cylinder injector
•
The secondary injection relay (no. 35 in the electrical circuit diagram, placed under the fuel
tank, on the right side of the filter housing; CHECK, however, the identification of the relay
with the colour of the cables) is energised for 5 seconds and the injector cable connected
to the control unit is closed to ground for 4 ms per each second. It is recommended to
disconnect the 4-way connector of the fuel pump to be able to hear the relay and injector
activation. Electrical continuity is required in the wiring for the relay to activate correctly: no
errors are generated in case of no activation.
Rear cylinder injector
SHIVER 900
Electrical system
ELE SYS - 157