Marea- Marea Weekend
ft
99 range
16v
Engine
Fuel system
INJECTION NTC
°c
M
°C
M
-20
16900-15000
40
1200-1100
-10
10100-9100
50
830-780
0
6300-5700
60
590-560
10
4000-3600
70
430-400
20
2600-2400
80
315-300
25
2100-1950
90
235-225
30
1750-1600
100
137-133
10.
ENGINE COOLANT TEMPERATURE SEN-
SOR
This sensor is fitted on the thermostat.
It is made up of a brass casing which affords
protection to the actual resistive elements,
consisting of two NTC (Negative Temperature
Coefficient) thermistors whose electrical resis-
tance decreases as the temperature increases.
The two thermistors are distinct and provide
information concerning the temperature to the
instrument in the panel (A) and to the engine
control unit (B).
The reference voltage for the latter is 5 Volt:
since the intake circuit in the control unit is
designed as a voltage divider, the reference
voltage is divided 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 temperature information
The table illustrates the sensor specifications
which can be measured by disconnecting the
connector and connecting an ohmmeter as il-
lustrated.
Connector wiring
Copyright by Fiat Auto
25
Содержание 1998 Marea Weekend
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