Yamaha XVS650 Service Manual page 316

CARBURETOR HEATER SYSTEM
I
ELEe
11=-:.1
I
I
Replace thermo switch.
Thermoswitch
23±3°C
Thermoswitch
12±4°C
INCORRECT
6.Thermo switch
• Remove the thermo switch from the
thermo switch plate.
• Connect the pocket tester to the thermo
switch lead.
Tester
(+)
lead
--7
Brown/Yellow terminal
CD
Tester (-) lead
--7
Black/Yellow terminal
®
• Immerse the thermo switch in the water
(ID.
• Check the thermo switch for continuity.
Note the temperatures while heating the
water with the temperature gauge @.
Test step Water temperature
Good
condition
1
Less than 23
±
3°C
0
(73.4
±
5.4°F)
2
More than 23
±
3°C
x
(73.4
±
5.4°F)
3
More than 12
±
4°C
x
(53.6
±
7.2°F)
4
Less than 12
±
4°C
0
(53.6
±
7.2°F)
Test 1 & 2: Heat-up test
Test 3 & 4: Cool-down test
0:
Continuity X: No continuity
• If condition is not good, replace the
thermo switch.
..J}.
CORRECT
7.Carburetor heater
• Remove the carburetor heater from the
carburetor body.
• Connect the pocket tester to the carbu-
retor heater.
Tester
(+)
lead
--7
Heater terminal
CD
Tester (-) lead
--7
Heater body
®
o
(§)+
lli1l501
7 - 47