Yamaha YFM350FAS, Supplementary Service Manual

Page: 112 / 119

– 102 –
– +
ELEC
COOLING SYSTEM
C0NTINUITY
CONTINUITY
6.Fan motor relay
●
Remove the fan motor relay from the wire
harness.
●
Connect the pocket tester (
Ω ×
1) and the
battery (12 V) to the fan motor relay
terminals.
Tester (+) lead
→
Red/Black terminal
1
Tester (–) lead
→
Blue terminal
2
Battery (+) terminal
→
Red/White terminal
3
Battery (–) terminal
→
White/Yellow terminal
4
●
Check the fan motor relay for continuity.
*
NO CONTINUITY
Replace the fan motor relay.
W / Y
R / W R / B
L
2
1
3
4
GOOD
CONDITION
7.Thermo unit
●
Remove the thermo unit from the
crankcase.
●
Connect the pocket tester (
Ω ×
100) to the
thermo unit
1
.
●
Immerse the thermo unit in engine oil
2
.
●
Measure the resistance.
Thermo unit resistance:
150 °C (302 °F): 307 ~ 339
Ω
170 °C (338 °F): 209 ~ 231
Ω
WARNING
Handle the thermo unit with special care.
Never subject it to a strong shock or allow
it to be dropped. Should it be dropped, it
must be replaced.
T
R
.
.
Thermo unit:
20 Nm (2.0 m • kg, 14 ft • lb)
*
BAD CONDITION
Replace the thermo unit.