MOTO GUZZI GRISO 8V - 1200 Service Station Manual page 64

Electrical system
•
If the circuit is open, shorted to negative: voltage equal to zero has been detected at PIN 11
of the BLUE connector
Troubleshooting
•
shorted to positive: disconnect the probe connector and check the sensor correct resistance:
replace the sensor if not OK; if it is OK, restore the cable harness.
•
if the circuit is open, shorted to negative: check the continuity from probe connector (PIN 3
and 4) towards the probe: if not OK, replace the probe; if it is correct, check the sensor
connector and the Marelli control unit connector. If not OK, restore. If OK, and with key set
to ON and sensor connector disconnected, check if there is battery voltage at PIN 4: if not
OK, check the red/black cable (cable harness side) between the probe connector and the
auxiliary injection relay (No. 29 in the wiring diagram, placed under the saddle, rear side, in
the auxiliary fuses/relays box, close to the fuses, in the row towards the rear; CHECK, how-
ever, the identification of the relay with the colour of the cables). If there are also coil and
injector errors, check that relay and its excitation and power line; if there is voltage at PIN
4, check the white cable ground insulation, cable harness side (PIN 3): if it is not OK, restore
the cable harness. If OK, check continuity of the white cable, cable harness side (between
PIN 3 of the sensor connector PIN 3 and PIN 11 of the BLUE connector) and restore the
cable harness.
Injector
Function
To supply the correct amount of petrol at the right
timing.
Operation / Operating principle
Injector coil is excited for the petrol passage to
open.
Level in wiring diagram:Coils and injectors
Location:
•
on the throttle bodies
•
connector: on injector
Electrical characteristics:14.8 Ohm +/- 5% (at
20 °C)
Pin-out:
"+": Supply:
" ": Ground connection
AXONE:FUEL INJECTION SYSTEM
AXONE: PARAMETERS
ELE SYS - 64
GRISO 8V - 1200