wiring diagram YAMAHA YZ250F 2016 Owners Manual

CHARGING SYSTEM
8-8
EAS1SM9323TROUBLESHOOTING
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 8-43.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

EAS1SM9381
WIRING DIAGRAM
YZ250F/YZ250FG 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. ECU (electronic control unit)
10. Ignition coil
11. Spark plug
12. Fuel injector
13. Fuel pump
14. Intake air temperature sensor
15. Coolant temperature sensor
16. Throttle position sensor
17. Intake air pressure sensor
18. Ignition coil sub-lead
EAS1SM9382COLOR 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/B Yellow/Black
Y/W Yellow/White

ONOFF
R
O
OR
RRRRRRRBBBBBLLLB/LB/LB/LB/LB/LB/L
B/LGy
WW
WWR
R
B
B
B
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
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
R
B/YBB
B
PY/BSb
SbY/WP
B Gy RB/WB/LL YP/BG/WB/RR/BLgBr/WP
OB/YY/BSb
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
B B B B BB/L B/LB/L B/LB/L B/L
YZ250F/YZ250FG 2016
WIRING DIAGRAM YZ250F/YZ250FG 2016
SCHÉMA DE CÂBLAGE
YZ250F/YZ250FG 2016
SCHALTPLAN
1SM-28199-80_W.D.indd 12015/03/11 14:07:38

ONOFF
YZ250F/YZ250FG 2016
WIRING DIAGRAMYZ250F/YZ250FG 2016
SCHÉMA DE CÂBLAGE
YZ250F/YZ250FG 2016
SCHALTPLAN
1SM-28199-80_W.D.indd 22015/03/11 14:07:38