L1H1 O2 sensor wire colors - Fuelly Forums

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Old 11-09-2009, 04:42 PM   #1
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L1H1 O2 sensor wire colors

Trying to find out what the 5 wires on the L1H1 NTK O2 sensor are for, such as which ones are heaters, etc. The colors on my sensor are:
White
Yellow
Orange
Red
Black
This was an engine swap, from obdo to obd1, with a conversion harness and now I need to get the O2 connected to a PO7 ecu which I just obtained. No plugs or harnesses available to me, just wanted to know what the colors on the actual sensor side were for and then I could find the proper pinout on the ecu.
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Old 11-11-2009, 05:43 PM   #2
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Got this from NGK

Yellow: Heater Ground (-)

Orange: Heater Power (+)

Black: Common Ground ( for IP and Vs )

White: IP circuit (Current pumping) (+)

Red: Vs reference (+)

Now, could anyone guide me to which pins these would go on the PO7 ecu?
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Old 11-12-2009, 10:15 AM   #3
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http://www.thelic.org/users/tomo/LAFtroublshoot.pdf
Last page of that PDF will show you what you need to know.
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Old 11-12-2009, 12:15 PM   #4
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What pdf? Is there one located on that web link, I do not see any pdf files attached anywhere?
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Old 11-12-2009, 12:54 PM   #5
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Look again, it's there now, I just had image tags on it by accident, lol.
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