APRILIA TUONO V4 R 2010 Service Station Manual page 174

Electrical system
•
If shorted to positive: check whether the relay electrical specifications are correct by dis-
connecting it from the cable harness. If are not OK, replace the relay; if OK, restore the cable
harness (Brown/Black cable).
•
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:
•
on the vehicle: on the head covers.
•
connector: For each 3-ways black coil
connector. Coil 1 with short cable: on
the left on the filter box, rear side; coil
2 with long cable: on the left of the front
side of the filter box (connector with red
strap on engine cable harness), coil 3
with long cable: on the left on the rear
side of the filter box (connector with red
strap on engine cable harness); coil 4
with short cable: on the right of the front
side of the filter box.
Electrical characteristics:
0.7 - 0.9 Ω at ambient temperature
Pin out:
1. Power supply + Vbatt
2. Secondary circuit to ground
3. Activation from control unit
DIAGNOSIS INSTRUMENT: PARAMETERS
ELE SYS - 174
TUONO V4 R