Fuel Temperature Sensor; Fuel Pressure Sensor - Fiat Bravo Service Manual

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E N G I N E C O O L A N T T E M P E R A T U R E

This sensor is fitted on the thermostat and de-

tects the temperature of the engine coolant by

means of an NTC thermistor w i t h a negative re-

sistance coefficient.

The sensor is produced using semiconductor

technology, therefore if the temperature of the

sensor element increases as the temperature of

the coolant increases, the resistance value de-

creases as a result.

As the variation in the resistance is not linear,

the same increase in temperature is greater at

lower temperatures than at higher temperatures.

1. NTC resistance

2. Sensor body

3. Electrical connector

F U E L T E M P E R A T U R E S E N S O R

This sensor is fited on the return manifold and

detects the temperature of the fuel through an

NTC thermistor w h i c h has a negative resistance

coefficient.

For the operation of the sensor, refer to the pre-

vious description dealing w i t h the coolant tem-

perature sensor.

F U E L P R E S S U R E S E N S O R

This sensor is fitted in the centre of the fuel sup-

ply manifold (rail) and has the task of supplying

("feed-back") signal for:

- regulating the injection pressure;

- regulating the duration of the injection.

Print no. 506.670/16