Keeper of the Bookmarks / Moderator
Join Date: Oct 2006
Location: Oologah, Indian Territory, USA...
Model: GL1800 Hot Rod Yellow
the knock sensor outputs an A/C waveform that is Very Fast.
an Oscilloscope works best, but a fast digital DVM might catch the readings.
DaveO430 used the Hertz ( Frequency Measurement ) setting on his DVM to test my bike for a bad sensor.
at first, we switched them from side to side, the code stayed the same, indicating it is the ECM that is at fault.
then, Dave tested both sensors for the A/C output waveform, and yes, both of them put out the same signal.
it is very small, and very fast. look close.
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