LIST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS
9-5
SENSOR OPERATION TABLE
Diag-
nostic
code
No.ITEM Display Procedure
01 Throttle angle
• Fully closed position
• Fully opened positionDisplays the throttle angle.
• 11–14
• 109–116• Check with throttle fully
closed.
• Check with throttle fully
opened.
03 Pressure of suction pipe Displays the intake air pres-
sure.The atmospheric pressure
is displayed on the Yamaha
diagnostic tool.
05 Intake air temperature Displays the intake air tem-
perature.Compare the actually mea-
sured intake air tempera-
ture with the Yamaha
diagnostic tool display val-
ue.
06 Coolant temperature Displays the coolant temper-
ature.Compare the actually mea-
sured coolant temperature
with the Yamaha diagnostic
tool display value.
08 Lean angle sensor
• Upright
•OverturnDisplays the output voltage.
• 1.0 (V)
• 4.0 (V)Remove the ECU, and in-
cline it 45 ° or more.
09 Monitor voltage Displays the voltage of the
external battery connected to
the Yamaha diagnostic tool.
• Approximately 12.0 (V)—
21 Neutral switch
• Gear in neutral
• Gear not in neutral•ON
•OFFOperate the shift pedal.
25 Gear position switch
• Gear in 1st or 2nd
• Gear not in 1st or 2nd•ON
•OFFOperate the shift pedal.
60 EEPROM fault code No.
display
• No fault
• CO adjustment valve
• Power Tuner injection cor-
rection setting 0–8, or
Power Tuner ignition tim-
ing correction setting 0–8•00
•01
•07—
61 Malfunction history ( )
code No. display *1
• There is no history.
• There is some history.•00
• Other: Displays the fault
code of ( ).—
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
