What tells the ecu to fire the cold start injector?

[chrisarnt]

The thermal switch?
Head sensor?
What’s the correct resistance across the pins?

[busdaddy]

The ECU plays no part in the CSV's operation. The double relay sends power to the TTS while cranking, if the TTS is cold enough it will energise the CSV, this can be a second or two in sub zero temps, or milliseconds if it's warm out, if it's cranked recently and the TTS is still warm the CSV won't squirt at all.

http://www.ratwell.com/technical/DoubleRelay.html
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[chrisarnt]

Looking at the L jet manual the resistance goes to infinity about 68 degrees.

So, is it safe to assume that the cold start valve plays no part in the mix above that temp?

I'm guessing I shouldnt worry about it.

[vwoldbug]

Correct