Yamaha YZ450F, Owner'S Service Manual

Page: 598 / 650

6 - 10
– +
ELEC
TPS (THROTTLE POSITION SENSOR) SYSTEM
6. Adjust:
• Idle speed
Refer to “IDLE SPEED ADJUSTMENT”
section in the CHAPTER 3.
7. 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.
8. Start the engine.
9. 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