Digital Ignition Control - Yamaha F200B Service Manual

TECH
FEA

Digital ignition control

In digital ignition control, the engine ECM determines the optimum ignition timing according to the
signals from the sensors and sends the primary current to the ignition coils. According to the engine
operating conditions, the basic ignition timing and ignition coil energization time are determined. In
addition, various restrictions and compensations are made to determine the actual ignition timing.
The ignition timing is also controlled according to the knock control. See "Knock control" (2-7).
Pulser coil
Cam position sensor
(PORT EX)
Cam position sensor
(PORT IN)
Cam position sensor
(STBD IN)
APS
TPS
Air pressure sensor
Air temperature sensor
Engine temperature sensor
Knock sensor
Shift cut switch
Engine shut-off switch
Battery
Engine start switch
2-5
Technical features and description
Engine
ECM
Ignition coil