APRILIA RSV4 RR 2017 Service Station Manual page 178

Electrical system
UPPER INJECTOR Function
Provide the correct amount of fuel at the correct
time. The lower injectors work in the field of low
engine revs, the upper injectors in the field of high
engine revs.
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 filter box cover
•
connector: on injectors
Electrical specifications:
12 +/- 0.6Ω ± 5% (at ambient temp)
Pin out:
•
"+": supply
•
" ": ground
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
Lower injector cylinder 1
•
The injection relay (No. 33 in the electrical circuit diagram, placed under saddle, right side;
CHECK, however, the identification of the relay with the colour of the cables) is energised
for 5 seconds and the injector cable connected to control unit is closed to ground for 4 ms
per second. 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 if the relay fails to activate
Upper injector cylinder 2
•
The injection relay (No. 33 in the electrical circuit diagram, placed under saddle, right side;
CHECK, however, the identification of the relay with the colour of the cables) is energised
for 5 seconds and the injector cable connected to control unit is closed to ground for 4 ms
per second. 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 if the relay fails to activate
Upper injector cylinder 3
ELE SYS - 178
RSV4 RR-RF