Excess Pressure Sensor; Atmospheric Pressure Sensor - Fiat Bravo Service Manual

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Table of Contents

CLUTCH P E D A L S W I T C H

There is a switch (2) on the clutch pedal connected to pin 2-2 of the injection control unit.

The "clutch pedal operated" signal is used by the injection control unit to distinguish the gear engaged

and gear shift conditions.

A T M O S P H E R I C P R E S S U R E S E N S O R

The atmospheric pressure sensor is incorporated inside the injection electronic control unit and has the

task of measuring the atmospheric pressure in order to correct the air f l o w rate value measured and the

reference air f l o w rate for controlling the EGR function.

E X C E S S P R E S S U R E S E N S O R

This sensor is fitted on the inlet manifold and

the signal transmitted to the injection control

unit is used for:

- regulating the injection pressure;

- regulating the duration of the injection.

The diagram at the side shows the sensor and

the electrical connector w i t h the pin-out:

1. Pressure signal

B R A K E PEDAL S W I T C H

There is a switch (1) on the brake pedal

w h i c h operates the brake lights; the same

switch sends a signal to pin 2-8 of the in-

jection control unit.

The "brake pedal pressed" signal is used

by the control unit:

- for understanding that there is a decel-

eration situation;

- for checking the plausibility of the sig-

nal coming from the accelerator poten-

Print no. 506.670/16