Yamaha YZ450F(S), Owner'S Service Manual

Page: 586 / 642

6 - 10
– +
ELEC
TPS (THROTTLE POSITION SENSOR) SYSTEM
4. Adjust:
●
Idle speed
Refer to “IDLE SPEED ADJUST-
MENT” section in the CHAPTER 3.
5. Insert the thin electric conductors 2
(lead) into the TPS coupler 1 , as shown,
and connect the tester to them.
CAUTION:
●
Do not insert the electric conductors
more than required because it may
reduce the waterproof function of the
coupler.
●
Make sure that a short-circuit does not
develop between the terminals because it
may cause damage to electrical compo-
nents.
6. Start the engine.
7. Adjust:
●
TPS output voltage
Tester (+) lead
→
Yellow lead 3
Tester (–) lead
→
Black lead 4
Adjustment steps:
Adjust the installation angle of the TPS 1
to obtain the specified output voltage.
NOTE:
Measure the output voltage accurately with a
digital electronic voltmeter that gives an easy
reading of a small voltage.
TPS output
voltage
Tester selector
position
0.58 ~ 0.78 V DCV