2016 YAMAHA YZ450F wiring diagram

CHARGING SYSTEM
8-8
EASB111323TROUBLESHOOTING
The condenser is not being charged.
TIP
Before troubleshooting, remove the following part (s):
1. Seat
2. Air scoop (left)
1. Check the entire charging system’s
wiring.NG 
Reconnect.
OK 
2. Check the rectifier/regulator.
Refer to “CHECKING THE RECTI-
FIER/REGULATOR” on page 8-43.NG 
Replace the rectifier/regulator.
OK 
3. Check the stator coil.
Refer to “CHECKING THE STA-
TOR COIL” on page 8-42.NG 
Replace the stator coil.
OK 
4. Check the charging system wire
harness.
Refer to “CIRCUIT DIAGRAM” on
page 8-6.NG 
Repair or replace the wire harness.
OK 
Replace the condenser.

ELECTRICAL COMPONENTS
8-40
Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check
the wiring connections and if necessary, replace the switch.
ECA14370
NOTICE
Never insert the tester probes into the coupler terminal slots “1”. Always insert the probes
from the opposite end of the coupler, taking care not to loosen or damage the leads.
TIP
• Before checking for continuity, set the pocket tester range to “ 1” to make a “0” adjustment.
• When checking for continuity, switch back and forth between the switch positions a few times.
Terminal connections of the switch are shown in the terminal connection diagram below.
The switch positions “a” are shown in the far left column and the switch lead colors are shown in the
top row in the switch illustration.
TIP
“ ” indicates continuity between switch terminals (i.e., a closed circuit at each switch posi-
tion).
The example illustration below shows that:
There is continuity between red and brown when the switch is “ON”.Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
a

EASB111381
WIRING DIAGRAM
YZ450F/YZ450FG 2016
1. Crankshaft position sensor
2. AC magneto
3. Rectifier/regulator
4. Joint connector
5. Condenser
6. Coupler for connecting option-
al part
7. Engine stop switch
8. Neutral switch
9. Launch control switch
10. ECU
11. Ignition coil
12. Spark plug
13. Fuel injector
14. Fuel pump
15. Intake air temperature sensor
16. Coolant temperature sensor
17. Throttle position sensor
18. Intake air pressure sensor
19. Ignition coil sub-lead
EASB111382COLOR CODE
BBlack
Gy Gray
LBlue
Lg Light green
O Orange
PPink
RRed
Sb Sky blue
Y Yellow
B/L Black/Blue
B/R Black/Red
B/W Black/White
B/Y Black/Yellow
Br/W Brown/White
G/W Green/White
L/W Blue/White
P/B Pink/Black
R/B Red/Black
Y/G Yellow/Green
Y/R Yellow/Red
Y/W Yellow/White

ONOFF
ONOFF
B
R
RRRRRRRRBBBBBBLLLB/LB/LB/LB/LB/LB/L
B/LGy
WW
WWR
R
B
B
B
BR
Y/RY/G
Y/G
Y/B
Y/BY/WY/W
B/Y
L/WB/R
B/YB/Y
B/WR/BR/B
B/RB/R
G/W
P/B
P/BB/L
B/L
B/L
G/W
Br/WBr/WB/L
B/L
B/W
Y/R
Sb
P
SbSb
PPP
L
L
L
YY
B
B
Lg
Gy
Lg
R
R
RRR
R
R
O
O
OO
W W
W
WW
WW
W
R
B
B/LGy
B
Gy
B R
R B
RLgB/W
B/YBB
B
PP/LSb
SbY/WP
B
RY/R
Y/G
BB/WWR/Y
B Gy RB/WB/LL YP/BG/WB/RR/BLgBr/WP
OY/GB/YP/LY/RSb
RR/B
RB/R
B/LBr/W
B/L
G/W
L YB/L
B/LP/BL
L L L RR R RR R R R
B B BB B BB/L B/L B/L B/LB/L B/L
R
O
OR
YZ450F/YZ450FG 2016
WIRING DIAGRAM
YZ450F/YZ450FG 2016
SCHÉMA DE CÂBLAGE
YZ450F/YZ450FG 2016
SCHALTPLAN
B11-28199-80_W.D.indd 12015/03/26 11:01:39

ONOFF
ONOFF
YZ450F/YZ450FG 2016
WIRING DIAGRAMYZ450F/YZ450FG 2016
SCHÉMA DE CÂBLAGE
YZ450F/YZ450FG 2016
SCHALTPLAN
B11-28199-80_W.D.indd 22015/03/26 11:01:39