Lower Injector - APRILIA RSV4 Factory Service Station Manual

RSV4 Factory

LOWER INJECTOR

Function
To supply the correct amount of petrol at the right
timing. 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 excited for the petrol passage to
open
Level in wiring diagram:
Coils and injectors
Location:
•
on the vehicle: on the throttle body
•
connector: on injectors
Electrical characteristics:
14.8Ω ± 5% (at ambient temp)
Pin out:
•
"+": supply
•
" ": ground
DIAGNOSIS INSTRUMENT: 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
Cylinder injection time 3
•
Example value with engine on: 1.9 ms
Cylinder injection time 4
•
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.
DIAGNOSIS INSTRUMENT: ACTIVATION
Lower injector cylinder 1
•
The injection relay (No. 33 in the wiring diagram, placed under saddle, right side; CHECK,
however, the identification of the relay with the colour of the cables) is energised for 5 sec-
Electrical system
ELE SYS - 175