Yamaha YZ250(P)/LC, Owner'S Service Manual, Page: 518 / 584

6-10
TPS (THROTTLE POSITION SENSOR) SYSTEM
ELEC
3
2
1
2
3
L Y
B
3. Inspect:
9
TPS coil variable resistance
Check that the resistance in increased as
the lever
1
is moved from the full close
position to the full open position.
Out of specification
→
Replace.
Tester (+) lead
→
Yellow
lead
2
Tester (–) lead
→
Black
lead
3
Tester selector
position
Full closed Full opened
Zero~2k
Ω
at 4~6k
Ω
at
20°C (68°F) 20°C (68°F)
k
Ω ×
1
EC693001
TPS REPLACEMENT AND ADJUSTMENT
1. Remove:
9
Carburetor
9
Mixing chamber top
Refer to “CARBURETOR AND REED
VALVE” section in the CHAPTER 4.
2. Remove:
9
Screw (TPS)
1
9
TPS
2
NOTE:
Loosen the screws using the T25 bit.
3. Replace:
9
TPS
TPS coil variable
resistance
5NX-9-30-6 6/5/01 4:44 PM Page 26