No voltage through o2 wiring

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  • e3irsty
    Advanced Member
    • Jan 2014
    • 134

    #1

    No voltage through o2 wiring

    Installing my innovate wideband, with key ignition on no voltage is coming through either white wires on my O2 wiring. Where do I go from there. Does it need to be running?

    Thanks!
  • vpilarrt
    R3VLimited
    • Jun 2006
    • 2096

    #2
    O2 heater relay (powers the 2 white wires) only operates on Start or Run.

    Comment

    • e3irsty
      Advanced Member
      • Jan 2014
      • 134

      #3
      Originally posted by vpilarrt
      O2 heater relay (powers the 2 white wires) only operates on Start or Run.
      So ignition on won't produce voltage on either wires and I thought one was a ground. So only one would get voltage. Sorry kinda confused

      Comment

      • nando
        Moderator
        • Nov 2003
        • 34827

        #4
        jump the relay trigger to the same trigger that trips the main relay - should be pin 85.

        or if you don't want it always on with ignition, you could do the same thing but jump it to the FP relay.
        Build thread

        Bimmerlabs

        Comment

        • whodwho
          E30 Mastermind
          • Jun 2008
          • 1547

          #5
          Currently it will activate the O2 heater relay when the fuel pump gets signal so it will briefly power up when you turn the key on and shut off and on when running. You can jumper the O2 heater relay and there will be power there with the key on.
          My M20 Frankenbuild(s)
          4 Sale - Fully Built TurnKey Megasquirt Plug and Play EMS

          Comment

          • e3irsty
            Advanced Member
            • Jan 2014
            • 134

            #6
            Thank you guys!

            Comment

            • e3irsty
              Advanced Member
              • Jan 2014
              • 134

              #7
              I am jumped to pin 85. But the status light on my lc2 just rapidly blinks green even with the key not in the ignition. And the gauge just blinks 7.4. Any help would be great thanks

              Comment

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