Yamaha MT-03 Service Manual page 387

EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
1. Check:
• Intake air pressure sensor output voltage
Out of specification
Intake pressure sensor output
voltage
3.4-3.8 V
a. Connect the pocket tester (DC 20 V) to
the intake air pressure sensor coupler as
shown.
Pocket tester
90890-03112
• Positive tester probe
• Negative tester probe
b. Turn the main switch to "ON".
c. Measure the intake air pressure sensor out-
put voltage.
EAS28410
CHECKING THE INTAKE AIR
TEMPERATURE SENSOR
1. Remove:
• Intake air temperature sensor (from the air
filter case)
EW5YU1002
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.
pink/white "1"
black/blue "2"
2
1
L P/W B/L
Replace.
ELECTRICAL COMPONENTS
Intake air temperature sensor
resistance
2.21-2.69 Ω at 20 °C (68 °F)
a. Connect the pocket tester (Ω x 100) to the
intake air temperature sensor terminal as
shown.
Pocket tester
90890-03112
• Positive tester probe
• Negative tester probe
2
1
b. Measure the intake air temperature sensor
resistance.
CHECKING THE RADIATOR FAN MOTOR
1. Check:
• Radiator fan motor
Faulty/rough movement
a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
• Positive tester probe
• Negative tester probe
c. Check the radiator fan motor movement.
8-60
brown/white "1"
black/blue "2"
Br/W B/L
Replace.
red "1
black "2"