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Page 852 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 31
–+ELECELECTRIC STARTING SYSTEM
DIODE INSPECTION
1. Remove the diode from wire har-
ness.
2. Inspect:
•Diode continuity
Use pocket tester 
(tester selection position 
Ω 
× 1) 
Incorrect c

Page 878 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 57
–+ELECTHROTTLE POSITION SENSOR SYSTEM
HANDLING NOTE
CAUTION:
Do not loosen the screw (throttle
position sensor) 1
 except when
changing the throttle position sen-
sor due to failure because i

Page 886 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 65
–+ELECTHROTTLE POSITION SENSOR SYSTEM
THROTTLE POSITION SENSOR 
INPUT VOLTAGE INSPECTION
1. Disconnect the throttle position
sensor coupler.
2. Start the engine.
3. Inspect:
•Throttle posit

Page 894 of 912

YAMAHA WR 250F 2007  Notices Demploi (in French) 7 - 73
–+ELECLIGHTING SYSTEM
CHECKING THE TAILLIGHT 
(LEDs)
1. Disconnect the taillight coupler.
2. Connect two jumper leads 
1
from the battery terminals to the
respective coupler terminal as
shown
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