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ELECTRICAL SYSTEM 16-89
Switch and Sensors
Radiator Fan Switch Inspection
•
Remove the fan switch from the radiator (see Radiator
Fan Switch Removal).
•
Suspend the switch [A] in a container of machine oil so
that the heat-sensitive portion and threaded portion are
submerged.
•
Suspend an accurate thermometer [B] with heat-sensitive
portions [C] located in almost the same depth.
NOTE
○
The switch and thermometer must not touch the con-
tainer sides or bottom.
•
Place the container over a source of heat and gradually
raise the temperature of the oil while stirring the oil gently
for even temperature.
•
Using the hand tester (special tool), measure the internal
resistance of the switch across the terminals at the tem-
peratures shown in the table.
If the measurement is out of the range, replace the switch.
Fan Switch Resistance
○
Rising temperature:
From OFF to ON at 102
∼
108°C (212
∼
226°F)
○
Falling temperature:
From ON to OFF at 97
∼
103°C (203
∼
217°F)
ON: Less than 0.5
Ω
OFF: More than 1 M
Ω
Water Temperature Switch Removal
CAUTION
The water temperature switch should never be al-
lowed to fall on a hard surface. Such a shock to the
part can damage it.
•
Drain the coolant (see Cooling System chapter).
•
Disconnect the switch connector.
•
Remove the water temperature switch [A] from the radia-
tor.
Water Temperature Switch Installation
•
Apply silicone sealant to the threads of the water temper-
ature switch.
Sealant - Kawasaki Bond: 59019–120
Torque - Water Temperature Switch: 7.8 N·m (0.80 kgf·m,
69 in·lb)
•
Fill the engine with coolant and bleed the air from the
cooling system (see Coolant Filling in the Cooling System
chapter).