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Å
ı
CARBURETOR HEATING SYSTEM
6 - 19
Ç The thermo switch circuit is open.
Î The thermo switch circuit is closed.
Test step Water temperature Continuity
TT-R90:
Less than 23 ± 3 ˚C
(73.4 ± 5.4 ˚F)
1
TT-R90E:
Less than 16 ± 3 ˚C
(60.8 ± 5.4 ˚F)
TT-R90:
More than 23 ± 3 ˚C
(73.4 ± 5.4 ˚F)
2
TT-R90E:
More than 16 ± 3 ˚C
(60.8 ± 5.4 ˚F)
TT-R90:
More than 12 ± 4 ˚C
(53.6 ± 7.2 ˚F)
3
TT-R90E:
More than 11 ± 3 ˚C
(51.8 ± 5.4 ˚F)
TT-R90:
Less than 12 ± 4 ˚C
(53.6 ± 7.2 ˚F)
4
TT-R90E:
Less than 11 ± 3 ˚C
(51.8 ± 5.4 ˚F)
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING
Handle the thermo switch with special
G
care.
Never subject the thermo switch to
G
strong shocks. If the thermo switch is
dropped, replace it.
Check the thermo switch operation.
G
–
+
ELEC
YES
NO
NO
YES
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