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Discussion Starter · #1 ·
Any one know why there are only 2 O2 inputs into the ECU?
should there be 3, since there are 3 O2's in the car?

or are the first 2 spliced together???

anyone?
I plan on cutting my harness tonight.
gonna cut my O2's and HT1 and HT2 wires, God help me
 

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Discussion Starter · #2 ·
in case anyone is interested/for future reference,
the THIRD O2 sensor signal goes to pin 30 on the ECU

found it in a Toyota ASE manual
also confirmed here
 
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