Marea- Marea Weekend
ft
99 update
16v
Engine
Fuel system
INJECTION NTC
INSTRUMENT
NTC
°c
Q,
°C
Q
-20 15971 40
1152
-10
9620
50
807
0
5975
60
576
10
3816
70
418
20
2502
80
309
25
2044
90
231
30
1679
100
176
°C
Q
60
90
120
512-602
184-208
76-88
KS1
B
T H 2 0
10.
ENGINE COOLANT TEMPERATURE S E N -
SOR
This sensor is fitted on the thermostat.
It consists of a brass casing which affords
protection for the resistive elements, compris-
ing two NTC type thermistors (Negative Tem-
perature Coefficient, where the electrical resis-
tance decreases as the temperature increases).
The two thermistors are distinctive and provide
information for the instrument panel (A) and
the engine management control unit (B), re-
spectively.
The reference voltage for the latter is 5 Volt:
since the control unit input circuit is designed
as a voltage divider, the reference voltage is
shared between a resistance in the control unit
and the actual sensor.
As a result, the control unit is capable of
evaluating the variations in the sensor resis-
tance through the changes in the voltage,
thereby obtaining information concerning the
temperature.
The table illustrates the sensor progress, which
can be measured by disconnecting the con-
nector and connecting an ohmmeter as shown
in the diagram.
Wiring connector
Copyright Fiat Auto
29
Содержание 1998 Marea Weekend
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