I see VVT ACT down there, but don't see where it connects to the ECU, tps or anything but a what appears to be a junction for that matter.
Basically it says pin 31 of the ECU goes to a relay which has something to do with the VVT.
(thanks for trying as I do want to understand, but it's a crap diagram AFA being able to trace anything)
As it's the only diagram in the public domain, it's fantastic!
As to the pretty words up above 'blah, blah, function map blah, blah, timing variator', oddly enough, a few spider books say the same thing depending on what one you look at. That doesn't make it right though, just a laymans description.
Well it comes from the section of a manual devoted to the testing of the ECU and it's ancillaries so why mention it if it operates on it's own?
Is there another diagram available somewhere? I'm actually pretty curious as to how things are routed.
Yes, many but they're too big for here, download the Twin Spark 'S' manual from my site and look at image 75TS_S-00-71.gif and see if you can follow it.
Follow pin 31 of the ECU to S12c (VVT relay) then the output of S12c (pin 87) to S15 (VVT solenoid, but it's not listed as such).
Also follow the wiring from S6 (TPS) and see where it goes.
Of course the other way around it would be to disconnect the ECU from the rest of the system right at the multipin harness plug then turn the key on and roll the throttle full on.
If the VVT kicks, then it's tps for sure and nothing to do with the ECU, function map or otherwise. (I'm guessing no-one will be willing to unhook an ECU for such a test though, and I honestly wouldn't blame them)
I don't have to, I know how it's connected. You could just believe me
, I do know how my car is wired.