Checking The Intake Air Pressure Sensors - Yamaha MT-01 T 2005 Service Manual

M MMM M MMM M M MMM M
a. Disconnect the decompression solenoid cou-
plers from the wire harness.
b. Connect the pocket tester (Ω × 10) to the de-
compression solenoid coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
green "1"
• Negative tester probe →
green "2"
c. Measure the decompression solenoid (ther-
mistor) resistance.
L LLL L LLL L L LLL L
2. Check:
• Decompression solenoid resistance
Out of specification → Replace.
Decompression solenoid
resistance
0.96–1.44 Ω at 20 °C (68 °F)
M MMM M MMM M M MMM M
a. Connect the pocket tester (Ω × 1) to the de-
compression solenoid coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
black "1"
• Negative tester probe →
black "2"
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
ELECTRICAL COMPONENTS
MMM
b. Measure the decompression solenoid resis-
tance.
L LLL L LLL L
EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSORS
The following procedure applies to both of the in-
take air pressure sensors.
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-
LLL
take air pressure sensor coupler as shown.
• Positive tester probe →
pink/white "1" or pink/yellow
MMM
• Negative tester probe →
black/blue "2"
b. Turn the main switch to "ON".
c. Measure the intake air pressure sensor out-
put voltage.
L LLL L LLL L
7-106
L LLL L L LLL L L LLL L
Intake pressure sensor output
voltage
2.4 V
M MMM M M MMM M M MMM M
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
2
B/L P/W
L LLL L L LLL L L LLL L
L LLL L LLL
M MMM M MMM
1
L
L LLL L LLL