Yamaha YZ 2019 Series Owner's Service Manual page 319

FUEL INJECTION SYSTEM
1. Joint connector
2. Joint connector
3. Joint connector
4. AC magneto
6. Main relay
8. Battery
9. Frame ground
10.Starter relay
11.Main fuse
14.Warning light
15.Engine trouble warning light
21.ECU (Engine Control Unit)
24.Injector
29.Joint connector
30.Intake air temperature sensor
31.Coolant temperature sensor
32.Throttle position sensor
33.Intake air pressure sensor
34.Lean angle sensor
35.Engine stop switch
36.Neutral switch
37.Diode
38.Starting circuit cut-off relay
39.Clutch switch
41.Frame ground
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