Yamaha YZ250 Owner's Service Manual page 528

TPS (THROTTLE POSITION SENSOR) SYSTEM
2
1
3
3. Inspect:
2
L Y
B
3
Tester (+) lead ¡Yellow lead 2
Tester (–) lead ¡Black lead 3
EC693001
TPS REPLACEMENT AND ADJUSTMENT
1. Remove:
2. Remove:
NOTE:
Loosen the screws using the T25 bit.
3. Replace:
6-11
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.
TPS coil variable
resistance
Full closed Full opened
Zero~2kΩ at 4~6kΩ at
20°C (68°F) 20°C (68°F)
9 Carburetor
9 Mixing chamber top
Refer to "CARBURETOR AND REED
VALVE" section in the CHAPTER 4.
9 Screw (TPS) 1
9 TPS 2
9 TPS
ELEC
Tester selector
position
kΩ × 1