Yamaha 2003 YZ450FR Owner's Service Manual page 278

TPS (THROTTLE POSITION SENSOR) SYSTEM
2
1
1
2
b a
3. Inspect:
TPS coil variable resistance
G
Check that the resistance in increased
as the throttle grip is moved from the
full close position to the full open posi-
tion.
Out of specification → Replace.
Tester (+) lead → Yellow lead 1
Tester (–) lead → Black lead 2
TPS coil variable
resistance
Full closed Full opened
0 ~ 2 kΩ at
20 ˚C
(68 ˚F)
TPS REPLACEMENT AND ADJUSTMENT
1. Remove:
TPS coupler
G
Screw (TPS) 1
G
TPS 2
G
NOTE:
Loosen the screws (TPS) using the T25 bit.
2. Replace:
TPS
G
3. Install:
TPS 1
G
Screw (TPS) 2
G
TPS coupler
G
NOTE:
Align the slot a in the TPS with the projec-
G
tion b on the carburetor.
Temporarily tighten the screws (TPS).
G
6 - 9
– +
ELEC
Tester selec-
tor position
4 ~ 6 kΩ at kΩ × 1
20 ˚C
(68 ˚F)