Yamaha YZ450FX 2021 Owner's Service Manual page 369

EAM20149
WIRING DIAGRAM
YZ450FXM 2021
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
11. Starter motor
12. Diode 1
13. Diode 2
14. CCU (Communication Control
Unit)
15. Warning light
16. Fuel level warning light
17. Engine trouble warning light
18. Resistor
19. Yamaha diagnostic tool cou-
pler
20. ECU (Engine Control Unit)
21. Ignition coil
22. Spark plug
23. Fuel injector
24. Fuel sender
25. Fuel pump
26. Radiator fan motor fuse
27. Radiator fan motor lead coupler
(OPTION)
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
35. Mode switch
36. Start switch
37. Diode 3
A. Battery sub-lead
B. Wire harness
C. Ignition coil sub-lead
D. CCU sub-lead
EAM30323
COLOR CODE
B Black
Br Brown
Gy Gray
L Blue
Lg Light green
O Orange
P Pink
R Red
Sb Sky blue
W White
Y Yellow
B/L Black/Blue
B/O Black/Orange
B/R Black/Red
B/W Black/White
B/Y Black/Yellow
Br/W Brown/White
G/W Green/White
G/Y Green/Yellow
L/B Blue/Black
L/G Blue/Green
L/R Blue/Red
L/W Blue/White
L/Y Blue/Yellow
P/B Pink/Black
P/L Pink/Blue
R/B Red/Black
R/L Red/Blue
R/W Red/White
R/Y Red/Yellow
W/B White/Black
W/G White/Green
Y/G Yellow/Green
Y/R Yellow/Red
Y/W Yellow/White