Yamaha YZ250(W)/W1 Owner's Service Manual page 540

TPS (THROTTLE POSITION SENSOR) SYSTEM
EC694000
TPS INPUT VOLTAGE INSPECTION
1. Disconnect the TPS coupler.
2. Start the engine.
3. Inspect:
9 TPS input voltage
Out of specification ¡ Replace the CDI
unit.
Tester (+) lead ¡Blue lead 1
Tester (–) lead ¡Black/Blue lead 2
TPS input
voltage
4~6V
6-14
ELEC
Tester selector
position
DCV-20