MOTO GUZZI B043157 Service Station Manual page 142

Electrical system
•
If the circuit is open, shorted to negative: check the relay electrical characteristics are correct
by disconnecting it from the cable harness; if it is not OK, replace the relay, if it is OK, check
relay connector, engine-vehicle cable harness connector and VEHICLE connector of the
Marelli control unit: if not OK, restore; if OK, check continuity of cable harness (Brown/Black
cable)
Coil
Function
Spark generation
Operation / Operating principle
Inductive discharge system
Level in electrical circuit diagram:
coils and injectors
Location:
•
connector: on the sensor
•
on the vehicle:
1. LEFT CYLINDER SIDE COIL, left side, on
the frame ABOVE THE STARTER MOTOR.
2. RIGHT CYLINDER SIDE COIL, right side
above the rear brake reservoir.
3. LEFT CYLINDER CENTRAL COIL, left side
in front of the cylinder under the steering col-
umn.
4. RIGHT CYLINDER CENTRAL COIL,right
side immediately behind the right cylinder.
Electrical specifications:
0.7 - 0.9 Ω at ambient temperature
Pin out:
1. Fuel system
2. Ground connection
DIAGNOSTICS INSTRUMENT: PARAMETERS
Example value with key ON: Current ignition ad-
vance
Example value with engine on: Indicates the cyl-
inder advance where combustion will take place.
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
ELE SYS - 142
Moto Guzzi California 1400