Fiat 1996 Brava Service Manual page 276

Bravo- Brava &
1998 range
lev
Engine
Fuel system
INJECTION NTC
c
-20
-10
0
10
20
25
30
Q
15970
9620
5975
3816
2500
2044
1679
°C
40
50
60
70
80
90
100
Q
1150
807
576
418
309
231
176
NTC
INS1
C
80
90
100
110
120
■RUMENT
Q
300.8-313.2
226.3-234.1
172-177
132.9-136.1
103.6-106.6
<fl
'I
A
I X A
I ^4.
B2
-D-
-v
_^
B
" ~7\
-^Qo s^
■
ENGINE COOLANT
SENSOR
10.
T E M P E R A T U R E
This sensor is fitted on the thermostat.
It is made up of brass casing which affords
protection for the actual resistive elements
consisting of two NTC (Negative Temperature
Coefficient) type thermistors whose electrical
resistance decreases as the temperature in­
creases).
The two thermistors are separate and provide
information concerning the temperature to the
instrument panel (A) and the engine man­
agement control unit (B), respectively.
The reference voltage for the latter is 5 Volt:
since the control unit intake 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 voltage, thereby
obtaining information concerning the tem­
perature.
The table shows the progress of the sensor,
which can be measured by disconnecting the
connector and connecting an ohmmeter as i l ­
lustrated in the diagram.
Connector wiring
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