OK to ground Temp Sensor II as a test?
1974 914/1.8, AFC L-Jet. Tested my Aux Air Valve; closes fine on bench in a few minutes when 12V applied. Wanted to see if TS-II was at fault by grounding it and seeing if I then had 12V at the connector to the AAV. resistance at operating temp is supposed to be about 200-400, so I want to be sure the computer will be OK with a value of 0.
Also, if I am reading the waterfall diagram correctly, there should there be 12V all the time at the AAV connector/pin 12 of relay when the fuel pump is running. So, does the ECM provide the ground for the AAV once it sees that the engine is up to temp?
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