Checking The Throttle Position Sensor; Checking The Intake Air Pressure Sensor - Yamaha 2010 XMAX YP125R Service Manual

3
d. Heat the coolant or let it cool down to the
specified temperatures.
e. Measure the coolant temperature sensor re-
sistances.
L LLL L LLL L L LLL L
3. Install:
• Coolant temperature sensor
Coolant temperature sensor
18 Nm (1.8 m·kgf, 13 ft·lbf)
EAS28300
CHECKING THE THROTTLE POSITION
SENSOR
1. Check:
• Throttle position sensor
M MMM M MMM M M MMM M
a. Connect the digital circuit tester to the throttle
position sensor as shown.
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe →
gray/red "1"
• Negative tester probe →
gray/black "2"
Y
b. Measure the throttle position sensor voltage.
Out of specification → Replace or repair the
wire harness.
1
2
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
Gy/B Gy/R
2 1
ELECTRICAL COMPONENTS
c. Connect the digital circuit tester to the throttle
position sensor as shown.
• Positive tester probe →
yellow "1"
• Negative tester probe →
gray/black "2"
LLL
d. While slowly opening the throttle, check that
the throttle position sensor voltage is in-
creased.
Voltage does not change or it changes
abruptly → Replace the throttle position sen-
MMM
sor.
Out of specification (closed position) → Re-
place the throttle position sensor.
L LLL L LLL L
EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
1. Check:
• Intake air pressure sensor output voltage
Out of specification → Replace.
M MMM M MMM M
a. Connect the test harness between the intake
air pressure sensor and wire harness.
b. Connect the pocket tester (DC 20 V) to the
test harness.
8-88
Throttle position sensor voltage
5 V
(gray/red–gray/black)
Y Gy/B Gy/R
1
2
Throttle position sensor voltage
(closed position)
0.40–0.90 V
(yellow–gray/black)
L LLL L L LLL L L LLL L
Intake air pressure sensor output
voltage
3.57–3.71 V
M MMM M M MMM M M MMM M
L LLL L LLL
M MMM M MMM