Engine Rpm And Tdc Sensor; Wiring Connector - Fiat Bravo Service Manual

Hide thumbs Also See for Bravo:

Table of Contents

Bravo-Brava £ p

E N G I N E RPM AND T D C S E N S O R

The engine rpm and TDC sensor (1) is fixed

to the cylinder block/crankcase and is facing

the flywheel on the crankshaft pulley.

Operating principle

The sensor consists of a tubular casing (1)

containing a permanent magnet (3) and an

electrical winding (2). As a result of passing

the flywheel teeth, the magnetic f l o w pro-

duced by the magnet (3) oscillations accord-

ing to the variation in the gap.

These oscillations create an electro-motive

force in the w i n d i n g (2) producing an alter-

nately positive voltage (tooth facing the sen-

sor) and negative voltage (gap facing the

sensor). The peak sensor output voltage de-

pends, all other factors being equal, on the

distance between the sensor and the t o o t h

The sensor resistance can be measured by

disconnecting the connector and connecting

and ohmmeter t o the sensor.

Resistance: 9600+10% ohm at 20 X