Speedometer Sensor - Fiat Bravo Service Manual

Hide thumbs Also See for Bravo:

Table of Contents

The sensor can be rapidly put out of action by even small amounts of lead in the fuel.

Checking the resistance

The resistance of the heater and the sensor

can be measured by disconnecting the c o n -

shown in the diagram.

Resistance = 500-1000 ohm at 20°C

S P E E D O M E T E R S E N S O R

The speedometer sensor (vehicle speed sen-

sor) is positioned at the differential outpur,

by the left driveshaft coupling and transmits

information concerning the vehicle speed t o

the control unit: the signal is also used for the

operation of the speedometer.

The sensor is the Hall effect type (see para-

graph on "engine timing sensor") and is cali-

brated so that each impulse corresponds to a

distance of one metre; it is possible to k n o w

the speed of the vehicle from the frequency

of the impulses.

The control unit uses this information for i m -

proving the management of the engine idle

adjustment actuator and for the CUT-OFF

Wiring connector

The numbers indicate the

control unit pins

and connecting

corresponding