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Old February 17th, 2011, 07:49
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Ecomike Ecomike is offline
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Join Date: Dec 2006
Location: MilkyWay Galaxy
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Re: Testing Jeep O2, Oxygen sensors

Quote:
Originally Posted by XJSteven View Post
My '96 is the same as xjtrailrider with 12 volt supply only going to the O2 heater after engine start up (and I suspect possibly for a few seconds with the ignition on - I could be wrong but it looks like it's on the same circuit as the fuel pump?).
I think Renix has 2 different relays, but I do recall that if the start cycle on Renix is not initiated after X minutes, the Renix ECU cuts power to the sensors IIRC. I recall having to cycle the switch after extended tests, maybe 5-10 minutes?
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