Technician A says that too large of an ABS wheel speed sensor air gap will result in a large increase in the sensor resistance which can be detected with a DMM ohmmeter. Technician B says that a DMM voltmeter should be set to the DC volts setting when testing an ABS wheel speed sensor. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is incorrect because an air gap affects the signal strength, not the resistance. Technician B is incorrect because an ABS wheel speed sensor generates an AC voltage, so the voltmeter should be set to AC volts, not DC volts.

Technician a Says That Too Large of an ABS Wheel