Yamaha WR426F(N) Owner's Service Manual page 702

TPS (THROTTLE POSITION SENSOR) SYSTEM
6. Adjust:
TPS coil resistance at idle speed
Adjustment steps:
Adjust the angle of the TPS 1 to obtain
the resistance calculated (example: 650 ~
750 )
Tester (+) lead
Tester (–) lead
7. Tighten:
Screw (TPS) 1
8. Install:
TPS coupler
EC694000
TPS INPUT VOLTAGE INSPECTION
1. Disconnect the TPS coupler.
2. Start the engine.
3. Inspect:
TPS input voltage
Out of specification
unit.
Tester (+) lead
Tester (–) lead
TPS input
voltage
4 ~ 6 V
6 - 10
–
ELEC
Yellow lead 2
Black lead 3
Replace the CDI
Blue lead 1
Black/Blue lead 2
Tester selector
position
DCV-20
+