Engine Stopping Due To Sidestand Operation - Yamaha MT-09 2021 Service Manual

EAS30491

ENGINE STOPPING DUE TO SIDESTAND OPERATION

When the engine is running and the transmission is in gear, the engine will stop if the sidestand is
moved down. This is because the electric current from the ECU does not flow to the ignition coils or fuel
injectors when the neutral switch or sidestand switch is open. However, the engine continues to run un-
der the following conditions:
• The transmission is in gear (the neutral switch is open) and the sidestand is up (the sidestand switch
circuit is closed).
• The transmission is in neutral (the neutral switch is closed) and the sidestand is down (the sidestand
switch circuit is open).
1. Battery
2. Main fuse
3. Main switch
4. Ignition fuse 1
5. Stop/run/start switch
6. Ignition coil
7. Spark plug
8. ECU (Engine Control Unit)
9. Relay unit (diode)
10. Sidestand switch
11. Neutral switch
1
9
11 10
8-5
IGNITION SYSTEM
2
3
4
5
8
6
7