Yamaha YZ450FX 2019 Owner's Service Manual page 317

FUEL INJECTION SYSTEM
1. Crankshaft position sensor
2. AC magneto
3. Rectifier/regulator
4. Joint connector
5. Main relay
6. Engine ground
7. Battery
8. Frame ground
9. Main fuse
10.Starter relay
14.CCU (Communication Control Unit)
15.Warning light
17.Engine trouble warning light
20.Yamaha diagnostic tool coupler
21.ECU (Engine Control Unit)
22.Ignition coil
23.Spark plug
24.Fuel injector
25.Fuel pump
26.Radiator fan motor fuse
27.Radiator fan motor (For JPN)
28.Radiator fan motor relay
29.Intake air temperature sensor
30.Coolant temperature sensor
31.Throttle position sensor
32.Intake air pressure sensor
33.Engine stop switch
34.Gear position switch
A. Battery sub-lead
B. Wire harness
C. Ignition coil sub-lead
D. CCU sub-lead
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