Checking The Cylinder Identification Sensor - Yamaha Vmax VMX17C 2009 Service Manual

• Never subject the atmospheric pressure
sensor to strong shocks. If the atmospheric
pressure sensor is dropped, replace it.
1. Check:
• Atmospheric pressure sensor output voltage
Out of specification → Replace.
Atmospheric pressure sensor
output voltage
3.57–3.71 V
M MMM M MMM M M MMM M M MMM M
a. Connect the pocket tester (DC 20 V) to the at-
mospheric pressure sensor coupler as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
pink "1"
• Negative tester probe →
black/blue "2"
2
b. Turn the main switch to "ON".
c. Measure the atmospheric pressure sensor
output voltage.
L LLL L LLL L L LLL L L LLL L
EAS28390
CHECKING THE CYLINDER
IDENTIFICATION SENSOR
1. Remove:
• Timing plate cover
2. Check:
• Cylinder identification sensor output voltage
Out of specification → Replace.
M MMM M M MMM M MMM
B/L P L
L LLL L L LLL L LLL
8-139
ELECTRICAL COMPONENTS
Cylinder identification sensor
output voltage (ON)
4.8 V
Cylinder identification sensor
output voltage (OFF)
0.8 V
M MMM M MMM M M MMM M M MMM M
a. Connect the pocket tester (DC 20 V) to the
cylinder identification sensor coupler as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Test harness-speed sensor (3P)
90890-03208
YU-03208
• Positive tester probe →
white/black "1"
• Negative tester probe →
black/blue "2"
W L/Y
b. Turn the main switch to "ON".
c. Rotate the crankshaft.
d. Measure the voltage of white/black and
black/blue. Turn the crankshaft twice and
check that the output voltage rises to approx-
imately 4.8 V once.
L LLL L LLL L L LLL L L LLL L
EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
EWA2S31019
WARNING
• Handle the intake air pressure sensor with
special care.
• Never subject the intake air pressure sen-
sor to strong shocks. If the intake air pres-
sure sensor is dropped, replace it.
M MMM M M MMM M MMM
1
L W/B
B/L
B/L
2
L LLL L L LLL L LLL