How to Measure the Three Wires of an Odometer Sensor?
1 Answers
Remove the speed sensor connector and use a multimeter set to the resistance mode to check the resistance value between the two leads of the sensor. Use an automotive oscilloscope to detect the signal voltage waveform between the two leads of the speed sensor, which should show an AC waveform. The amplitude and frequency of the waveform increase as the output shaft speed increases, indicating that the sensor is functioning properly.