Ignition Circuit - PIAGGIO Beverly 125 Service Station Manual

Beverly 125
Example with programmed control unit, trans-
ponder, programmed key and working aerial. The
ignition is enabled (regular use conditions)
3-FLASH CODE - Example with programmed control unit, aerial working properly and unknown trans-
ponder code. Ignition disabled-Vehicle immobilised

Ignition circuit

Once the immobilizer system is enabled, the HV coil and the signals from the Pick-Up will produce a
spark in the spark plug.
The battery provides the basic power supply. The system is adjusted so that the start-up system im-
mediately detects an eventual battery voltage drop, but this is practically irrelevant for the ignition
system.
The Pick-Up is connected to the control unit by a single cable; then, for the ground circuit, the control
unit is connected to the Pick-Up by the chassis and the engine ground lead.
To avoid disturbances in the ignition system during start-up, it is very important that the engine-chassis
ground connection bonding is efficient.
No spark plug
Once the lack of power to the spark plug has been
detected and the LED indicates it can be ignited,
follow this procedure:
- Pick-Up check.
Disconnect the control unit connector and check
the resistance value between terminal No. 2
(Green) and terminal No. 8 (Black). Check the
Pick-Up and its power line:
Electric characteristic
Pick-up resistance value
Electrical system
ELE SYS - 69