12. Electrical System
188
12.7.3 Cooling water temperature alarm
A water temperature lamp and water temperature gauge, backed up by an alarm in the instrument panel,
are used to monitor the temperature of the engine cooling water. A high thermal expansion material is
set on the end of the water temperature unit. When the cooling water temperature reaches a specified
high temperature, the contacts are closed, and an alarm lamp and buzzer are activated at the instrument
panel.
12.7.4 Sender unit for the cooling water
temperature gauge
The water temperature sender unit has a mounting seat
for mounting on the fresh water pump unit. Water
temperature is measured when the cooling water flows
into the thermostat housing after leaving the cylinder
head.
Operating
temperature
ON 97-103 deg.C
OFF 87 deg.C or high
Electric capacity DC 12V, 1A
Response time within 60sec.
Indication color Green
Tightening torque
23.5-31.4N•m
(2.40-3.20kgf-m)
Part code No. 119773-91700
Type Thermistor switch
Rated voltage 12V
Fuse
(Water temperature alarm circuit)
Battery
Main switch
Alarm buzzer
Pilot lamp
Water temperature unit
Water temperature
sender
Inlet for water heater
Water temperature
switch
Fresh water pump
Green
57.7mm
PT 3/8
M4
57.4
ISO R3/8 Tape
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