Checking The Horn; Checking The Engine Temperature Sensor - Yamaha MT-01 Service Manual

Manuals by Motomatrix / www.motomatrix.co.uk
M MMM M MMM M M MMM M M MMM
a. Set the engine tachometer to the cylinder-#1
left spark plug lead or right spark plug lead.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
red "1"
• Negative tester probe →
black "2"
B B B
c. Start the engine and let it run at approximate-
ly 5000 r/min.
d. Measure the charging voltage.
L LLL L LLL L L LLL L L LLL
EAS28180

CHECKING THE HORN

1. Check:
• Horn resistance
Out of specification → Replace.
Coil resistance
1.01–1.11 Ω at 20 °C (68 °F)
M MMM M MMM M M MMM M M MMM
a. Disconnect the horn leads from the horn ter-
minals.
b. Connect the pocket tester (Ω × 1) to the horn
terminals.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
horn terminal "1"
• Negative tester probe →
horn terminal "2"
Email: info@motomatrix.co.uk
M M MMM M M MMM M MMM
R B
2
1
L L LLL L L LLL L LLL
M M MMM M M MMM M MMM
ELECTRICAL COMPONENTS
c. Measure the horn resistance.
L LLL L LLL L L LLL L
2. Check:
• Horn sound
Faulty sound → Adjust or replace.
M MMM M MMM M M MMM M
a. Connect a battery (12 V) to the horn.
b. Turn the adjusting screw in direction "a" or "b"
until the horn sound is obtained.
a
L LLL L LLL L L LLL L
EAS28210
CHECKING THE ENGINE TEMPERATURE
SENSOR
1. Remove:
• Engine temperature sensor
(from the front cylinder head)
EWA14140
WARNING
• Handle the engine temperature sensor with
special care.
• Never subject the engine temperature sen-
sor to strong shocks. If the engine temper-
ature sensor is dropped, replace it.
2. Check:
• Engine temperature sensor resistance
Out of specification → Replace.
Engine temperature sensor
resistance
0.90–1.10 kΩ at 100 °C (212 °F)
7-102
1
2
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
b
L LLL L L LLL L L LLL L
LLL
MMM
LLL