Textbook Problem

While discussing Hall-effect vehicle speed sensor tests: Technician A says to use an ohmmeter to test the resistance of the coil. Technician B says that the voltage generated by the sensor can be measured by connecting a voltmeter across the sensors terminals. Who is correct?

1. Technician A

Technician B

Both A and B

Neither A nor B

To determine

The technician with correct approach.

Explanation of Solution

Given information:

Technician A says to use an ohmmeter to test the resistance of the coil.

Technician B says that the voltage generated by the sensor can be measured by connecting a voltmeter across the sensor’s terminals.

A vehicle speed sensor is described to be like a magnetic pulse generator. A waveform proportional to the vehicle speed is generated by the vehicle speed sensor. It helps in measuring the rotational speed of the output shaft and is mounted on the transaxle. When the output shaft is rotated, a pulsating voltage is generated in the sensor which is reflected on the speedometer...