Yamaha YZ450F(V) Owner's Service Manual page 600

TPS (THROTTLE POSITION SENSOR) SYSTEM
a
10. Put the aligning marks a on the TPS and
carburetor.
11. Stop the engine.
12. Remove the carburetor.
13. Tighten:
• Screw (TPS) 1
NOTE:
Tighten the screws (TPS) using the T25 bit.
1
14. Install the carburetor.
EC694000
TPS INPUT VOLTAGE INSPECTION
1. Disconnect the TPS coupler.
2. Start the engine.
3. Inspect:
• TPS input voltage
Out of specification → Replace the CDI
unit.
Tester (+) lead → Blue lead 1
Tester (–) lead → Black/Blue lead 2
6 - 11
ELEC
TPS input Tester selector
voltage
4 ~ 6 V
– +
position
DCV-20