Yamaha YZF-R1 1998 Service Manual page 260

CARBURETORS
EB600072
CHECKING AND ADJUSTING THE
THROTTLE POSITION SENSOR
NOTE:
Before adjusting the throttle position
sensor, the engine idling speed should
be properly adjusted.
1. Check:
• throttle position sensor
(installed on the carburetor)
a. Disconnect the throttle position sen-
sor coupler.
b. Connect the pocket tester (Ω × 1k) to
the throttle position sensor.
Tester positive probe → blue 1
Tester negative probe → black/blue 2
c. Measure the throttle position sensor
maximum resistance.
Out of specification → Replace the
throttle position sensor.
Throttle position sensor maxi-
mum resistance
4.0 ~ 6.0 kΩ at 20 ˚C
(blue — black/blue)
d. Connect the pocket tester (Ω × 1k) to
the throttle position sensor.
Tester positive probe → yellow 3
Tester negative probe → black/blue 2
e. While slowly opening the throttle,
check that the throttle position sensor
resistance is within the specified
range.
NOTE:
Check mainly
changes gradually when turning the
throttle, since the readings (from closed
to wide-open throttle) may differ slightly
from those specified.
Out of specification or the resistance
changes abruptly → Go to step (2).
Throttle position sensor resis-
tance
0 ~ 5 ± 1.0 kΩ at 20 ˚C
(yellow — black/blue)
6 - 12
CARB
that the resistance