Yamaha MM700F, Service Manual

Page: 476 / 589

8-30
– +
ELEC
SIGNAL SYSTEM
WATER TEMPERATURE SENSOR
1. Disconnect the water temperature sensor cou-
pler
1
and remove the water temperature sen-
sor.
CAUTION:
Handle the water temperature sensor with spe-
cial care. Never subject it to shock or allow it to be
dropped. If it is dropped, it must be replaced.
2. Connect:
•
Pocket tester 1
(to the water temperature sensor)
NOTE:
Set the tester selector to the “
Ω ×
1” position.
3. Immerse the water temperature sensor 2 in
coolant 3 and check the water temperature
sensor operation.
Water temperature sensor resistance:
5.2 ~ 6.4 k
Ω
at 0°C (34°F)
0.300 ~ 0.364 k
Ω
at 80°C (176°F)
0.170 ~ 0.208 k
Ω
at 100°C (212°F)
4
Temperature gauge
CAUTION:
Never heat the coolant to a temperature of 120°C
(248.5°F) or more.
4. If the water temperature sensor operation is
defective, replace it.
5. Install the water temperature sensor and connect
the water temperature sensor lead.
Water temperature sensor:
23 Nm (2.3 m · kg, 17 ft · lb)
CAUTION:
Do not overtighten the water temperature sensor.
T
R
.
.
SCH8460
SCH8450