Checking The Throttle Position Sensor; Checking The Intake Air Pressure Sensor; Checking The Intake Air Temperature Sensor - Yamaha YFM70RY Service Manual

e. Measure the coolant temperature sensor re-
sistance.
L LLL L LLL L L LLL L
EAS28300
CHECKING THE THROTTLE POSITION
SENSOR
1. Remove:
• Throttle position sensor
(from the throttle body)
2. Check:
• Throttle position sensor maximum resistance
Out of specification → Replace the throttle
position sensor.
Resistance
3.08–5.72 kΩ
M MMM M MMM M M MMM M
a. Connect the pocket tester (Ω × 1k) to the
throttle position sensor terminal as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
blue "1"
• Negative tester probe
black/blue "2"
2
B/L
b. Measure the throttle position sensor resis-
tance.
L LLL L LLL L L LLL L
3. Install:
• Throttle position sensor
TIP
When installing the throttle position sensor, ad-
just its angle properly. Refer to "ADJUSTING
THE THROTTLE POSITION SENSOR" on page
7-7.
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
1
Y L
L LLL L L LLL L L LLL L
ELECTRICAL COMPONENTS
EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
LLL
1. Check:
• Intake air pressure sensor output voltage
Out of specification → Replace.
M MMM M MMM M
a. Connect the pocket tester (DC 20 V) to the in-
take air pressure sensor coupler as shown.
MMM
• Positive tester probe
pink/blue "1"
• Negative tester probe
black/blue "2"
b. Set the main switch to "ON".
c. Measure the intake air pressure sensor out-
put voltage.
L LLL L LLL L
EAS28420
CHECKING THE INTAKE AIR
TEMPERATURE SENSOR
1. Remove:
• Intake air temperature sensor
LLL
(from the air filter case.)
EWA14110
WARNING
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
2. Check:
• Intake air temperature sensor resistance
Out of specification → Replace.
8-73
Intake air pressure sensor output
voltage
3.00–4.00 V
M MMM M M MMM M M MMM M
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
2
1
B/L P/L L
L LLL L L LLL L L LLL L
M MMM M MMM
L LLL L LLL