Jump to content

Knock sensor testing

Recommended Posts

I have no idea if the knock sensor I have off of this `83 280ZX Turbo is good or not. It doesn't read any resistance when I test between the two terminals. Is this normal? Is there a way to test it? If I just leave it unplugged is this the same as having no knocking or the same as having constant knocking?

Link to post
Share on other sites

The knock sensor is very high impedence. If it's shorted it's bad. The only way I know of to test it is the way I tested mine - hook it up to an oscilloscope and rap it on the bench. If you get a waveform on the scope, it's good.


If you leave it unplugged, the ECU will not see any knocking, and this applies to a 300ZX ECU as well, that's the only way I got rid of the error code was to leave one terminal disconnected.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...