Camshaft or crankshaft sensor for automotive vehicle and diagnostic method for such a sensor

Motor vehicle camshaft or crankshaft sensor (10), said sensor including a toothed target (11), a measuring cell (12) adapted to supply a raw signal representing variations of a magnetic field induced by the rotation of the target (11), and a module (14) for processing the raw signal, wherein charactcrizcd in that the processor module (14) has two modes of operation:

• a first mode of operation, referred to as the “measurement mode”, in which the processor module (14) is adapted to supply at an output port (17) of the sensor (10) a measurement signal representing the times of passage of the teeth of the target (11) at the level of the measuring cell (12),
• a second mode of operation, referred to as the “diagnostic mode”, in which the processor module (14) is adapted to supply at said output port (17) of the sensor (10) a diagnostic signal different from the measurement signal and representing the amplitude of the raw signal.