6 - 9
–+ELEC
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
STARTER MOTOR OPERATION
1. Connect the positive battery terminal 1
and starter motor lead 2 with a jumper
lead 3.
Not operate → Repair or replace the
starter motor.
WARNING
A wire that is used as a jumper lead must
have at least the same capacity or more
as that of the a battery lead, otherwise the
jumper lead may burn.
This check is likely to produce sparks,
therefore make sure nothing flammable is
in the vicinity.
STARTING CIRCUIT CUT-OFF RELAY
INSPECTION
1. Remove:
Starting circuit cut-off relay
2. Inspect:
Starting circuit cut-off relay conduct
Use 12 V battery.
Battery (+) lead → Red/White lead 1
Battery (–) lead → Sky blue lead 2
Tester (+) lead → Red/White lead 3
Tester (–) lead → Red/White lead 4
R/W
3 R/W
4 Tester selec-
tor position
Connected
to battery
Ω × 1
Not
connected
to battery
2 4
3
1
ELECTRIC STARTING SYSTEM (TT-R90E)
6 - 19
–+ELEC
ÊThe thermo switch circuit is open.
ËThe thermo switch circuit is closed.
Test step Water temperature Continuity
1TT-R90:
Less than 23 ± 3 °C
(73.4 ± 5.4 °F)
TT-R90E:
Less than 16 ± 3 °C
(60.8 ± 5.4 °F)YES
2TT-R90:
More than 23 ± 3 °C
(73.4 ± 5.4 °F)
TT-R90E:
More than 16 ± 3 °C
(60.8 ± 5.4 °F)NO
3TT-R90:
More than 12 ± 4 °C
(53.6 ± 7.2 °F)
TT-R90E:
More than 11 ± 3 °C
(51.8 ± 5.4 °F)NO
4TT-R90:
Less than 12 ± 4 °C
(53.6 ± 7.2 °F)
TT-R90E:
Less than 11 ± 3 °C
(51.8 ± 5.4 °F)YES
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING
Handle the thermo switch with special
care.
Never subject the thermo switch to
strong shocks. If the thermo switch is
dropped, replace it.
Check the thermo switch operation.
È
É
CARBURETOR HEATING SYSTEM
