Hv Coil - PIAGGIO 500 cc Service Manual

Fuel injection

HV COIL

Terminals Conditions
20-23 During pump timing
with engine stopped
CIRCUIT DIAGRAM
6 5
87
30
+
86 85
To the main
electromagnetic switch
The ignition system integrated with the fuel injection is of the high-efficiency induction type.
The control unit controls two important parameters:
- Spark advance
This is optimized on the spot on the basis of engine revolutions, engine load, temperature and environmental
pressure.
With the engine idling, it is optimized to achieve speed stability at 1450 ± 50 rpm.
- Magnetization time
The magnetization time of the coil is controlled via the control unit.
The ignition power is increased during the engine starting phase
The fuel injection system recognizes the 4-stroke cycle, and so ignition is commanded only during the compression
phase.
To control the ignition circuit proceed as follows:
Connect the diagnosis tester 020460Y
(see page 9-17)
Activate the HV coil control with the commutator set
to "ON", switch on "RUN" and side stand raised.
Await the response of the tester.
Test completed successfully
Select the "errors" function
from the menu.
Check for the presence of
current or memorized errors
with respect to the HV coil
9 - 68
1 2
3 4
NO
Standard
Battery tension
23
20
13
2
19
Test failed
Repeat the test
Test failed
YES
1
1
ELECTRONIC CONTROL UNIT
2
INJECTOR
3
H.V. COIL
4
PUMP
5
CONTROL UNIT ELECTROMAGNETIC SWITCH
6
10A FUSE