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To elaborate a bit more, there are 2 switches on the clutch one at top, one on bottom. You've looking for the one on the bottom.

Well, I made an attempt to measure its output - don't know if I actually made any progress at all. I'd like to know, IJ. if these were even close to what you found when you worked with your knock monitor. (Doesn't seem right to me) I could tap on the block while the car was off - the highest...

Not that I've ever seen... Most people just go stand alone before trying to mess with the stock ECU to such an extent.

Do you have all that stuff running in your car now? Did you make the harness yourself or have one made from your design?

Digital power distribution box made by ADD/Pratt & Miller, another one I've seen in use is Life Racing's PDU. AFAIK they're all very similar, most of the difference is probably in software and the level of tweaking that can be done.

This is the 1st I've seen of the Motec version of the IPU as well...

Interesting! That MoTeC system is quite advanced, didn't think you had that kind of fine tuning outside of very high end racing systems.

Like I said, frequency alone will not determine peak output. It will just tell me that it's tuned to ~7khz, like I knew, and as jdub elaborated on in his posts.

Well, to be honest, you didn't really inspire a whole lot of confidence in your knowledge when you said "Not even a check engine light" when 1st asked. So if you hadn't made such a rookie statement maybe people would start with less rookie problems - not to mention the fact that you're not...

I think you're misunderstanding... they're not even running it off the TCCS at the moment. Until they do that all that can happen is a little dick on wall action.

So, try running it with the TCCS again. Perhaps this wacky stand alone machine they're using hasn't been properly set up for the waste spark system in use on the 7M. Which could cause one ignition event from each coil to not occur, I suppose... BTW, is this you, or a "we", or a "they" that we...

Gotcha, thanks for your help! Too bad even that book you've got (which has the most detailed documentation I've heard) still doesn't have what the voltage is. Either it's an engineering super top secret, or it's actually a moving target depending on other factors. Specifically what those...

You've got that backwards. You can have codes and no check engine light, not check engine light with no codes.

OK, so the 7M system isn't specifically tuned to 7khz, but it still works off the same principal of voltage over a certain point and duration = take action? However, grim claims that a monitor cannot be made by monitoring voltage output, yet jdub says you could check the output by running...

Bump... one and only. 'Wish jj was still hanging around these parts...

It's in the EPC.

The threads have nothing to do with sealing the oil drain plug. You still need to make sure you're using an OEM Toyota gasket in there.

Yea, similar to what I was finding... that or people who think the KS pin on the ECU connector has something to do with knock sensors. ;)

You're right, it should spike when you apply a 7khz vibration to it, but the amplitude of that vibration will change the voltage. So doing that will simply show me that the sensor works - not what the threshold the TCCS looks for is.

Does anyone know with any certainty what the threshold voltage, as described in the attached pages, is for detonation control on the 7M?