o2 sensor wire to ECU

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  • E30godz
    E30 Mastermind
    • Oct 2003
    • 1524

    #1

    o2 sensor wire to ECU

    on the wireing diagram schematic for m20's i see two wires that lead to the ECU and are labeled O2 sensor....one goes to pin 10, and is yellow, the other goes to pin 28 and is black...which one?
  • DaN
    E30 Fanatic
    • Dec 2003
    • 1265

    #2
    Which one what?
    My guess is the yellow is the signal, black, a ground.

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