Installation Instructions
9
ELECTRICAL
SYSTEM
[7]
GAUGE
®
lOA
I-----~----,
®
®
B177F917
B1700·B2100·B2400 WSM,11770
The
fuel quantity and coolant
temperature
are
indicated
by
the ammeters.
The
ammeters indicate
each
amperate flowing through the fuel level
sensor
(7)
for
the fuel quantity detection and through the
coolant
temperature
sensor (8)
for
the
coolant
temperature detection.
(1) Main Switch
(2)
Fuse
(3) Fuel Gauge
(4)
Water
Tem perature
Gauge
(1) Fuel Quantity
(5) Slow Blow
Fuse
(6) Battery
(7) Fuel Level Sensor
(B)
Water
Temperature
Sensor
0329F068
(1) Float (2) Variable Resistor
(2) Coolant Temperature
•
Fuel
Level
Sensor
The
remaining fuel quantity
is
detected
by
the fuel
level
sensor
installed in the fuel tank and indicated
on the fuel gauge.
For
detection, a
float
and a
resistor
are
used.
As
the
float
(1) lowers,
the
resistance
of
the
variable resistor
(2)
varies.
The
relation between the
amount
of
fuel and the resistance
is
as
follows.
F
1/2
E(Remaining fuel
of
approx.
3.0
i,
0.79
U.S.
gal, 0.66Imp.gal)
1
to5
n
28.5
to
36.5 n
103
to
117 n
0329F069
(1) Terminal
(2) Insulator
(3) Body
(4) Thermistor
• Coolant Temperature Sensor
The
coolant temperature
sensor
is
installed
to
the
cylinder
head
of
engine,
and
its
tip
is
in touch
with
the
coolant.
It
contains a
thermistor
(4) whose
electrical resistance decreases
as
the
temperature
increases.
Current varies
with
changes
in
the
coolant
temperature, and the
increases
or
decreases
in
the
current move the pointer
of
gauge.
Characteristics
of
Thermistor
Temperature
Resistance
50°C
(122°F)
153.9 n
80°C
(176°F) 51.9 n
105°C
(221°F) 23.6 n
130°C
(266°F)
12.2
n
9-M16