Today I amused myself putting in a couple more signal wires from the engine coolant and air intake sensors into the battery compartment so that I can connect the scope whilst driving and makes checking things a lot easier than backprobing every time tou want to play
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Then took it for a quick spin to see that all worked..
I set the scope to record about 20 mins but was only away for just over half that..
The coolant is in blue the air intake in red..
The traces are a bit wide... I think that's because the sample rate is so high.. Unless you are at this all the time I forgot how to reduce the sample rate, but none the less you get a good idea of what's going on.. They are both negative temp coefficient sensors..
I suspect the kinks in the coolant trace is the thermostat starting to do something...
And the air intake shows the various speeds.. As you pick up speed the temp drops and when travelling slowly there is less cooling from the intercooler
The traces themselves are obviously just voltage traces but if you run something like torque at the same time you can relate a voltage with a specific temp
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