I have a permanent ABS warning on my dash. I have tried to use an OBDII scanner to diagnose it. However, the car does not support any error codes apart from engine management codes. Therefore I will have to use the old-fashioned way of using DMM and oscilloscope. After reading the following website: “https://premierautotrade.com.au/news...d-sensors.php” I am under impression that the Honda Civic mk7 uses a passive wheel speed sensor considering a two-wire harness.
After viewing the following video: “https://www.youtube.com/watch?v=wnvrsY-UPf4” I would like to try to verify each sensor. The frequency suggested in the video is 0.5Hz. At this frequency, the AC voltage should be around 250 mV. The AC setting of the DMM is optimised for 50-60Hz. Therefore, is the output of a WSS at a rate of 50Hz when the wheel is rotated at 0.5Hz? This would suggest 100 changes between N/S or teeth/gap. Is my assumption correct? Is the number of poles or teeth universal for all WSS? Lastly, what would be the easiest way to access the harness without fully lifting the car?

I have access to the ABS module in the engine bay. However, without a wiring diagram, I am not sure what to unplug and where to measure. Any hints are welcome. Thanks.