PLX Wideband wont connect with S300
PLX Wideband wont connect with S300
Ok so heres the deal. I have a boosted D16z6 with the S300 installed in a P28 by kaszenspeed. I recently bought the PLX DM-6 & SM-AFR combo to go with the S300. I hooked up the PLX (white 0-5v to D10), (Grey 0-1v to D14), power, ground and the gauge works and reads the A/F ratio fine, right at 14.7. Then I opened s300, went to parameters, closed loop, changed the wideband input source to D10 and still Im only reading like 1.0 a-f on the display in s300. I backprobed the D10 and D14 pins and im getting good voltages, why am I not reading on the s300? I have to be missing a step in the setup or something. Can someone please tell me where to go to set this up properly.
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Re: PLX Wideband wont connect with S300
Go to Options, settings and make sure you have the units set to AF and not to LAmbda, then go to the sensor list and double click on AF and make sure it is also set to AF.
Re: PLX Wideband wont connect with S300
Perfect. Thanks. Works great now
Re: PLX Wideband wont connect with S300
Just fought with this same thing for 30 minutes, thanks for getting me sorted out!
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Steeve_Civic
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- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
I have only the Grey wire connected to the D14.
Do I need the White wire??
Do I need the White wire??
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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
I don't have any white wire on my SM-AFR (bought installed on my car), only a black wire and gray.
Where do I must connect the White wire on the SM-AFR plug please?
My gray wire is connected like this

http://www.plxdevices.com/support/manua ... sGuide.pdf
Thank you
Where do I must connect the White wire on the SM-AFR plug please?
My gray wire is connected like this
http://www.plxdevices.com/support/manua ... sGuide.pdf
Thank you
Re: PLX Wideband wont connect with S300
You only need the white wire if you want to use the simulated narrowband output.
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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
Why do I need the narrow band if I use a PLX Wideband?
Do I need a narrow band output for closed loop?
Do I need a narrow band output for closed loop?
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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
Moreover what do I need to file please?

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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
Can you help me please?
Re: PLX Wideband wont connect with S300
What exactly are you trying to do and how do you have it hooked up?
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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
First I would like to get my AF on my display. I connected the gray wire to D14 Pin
Then use closed loop.
Thank you
Then use closed loop.
Thank you
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Steeve_Civic
- Posts: 45
- Joined: Mon Nov 12, 2012 12:57 am
Re: PLX Wideband wont connect with S300
I don't get the AFR on my display, could you help me?
Re: PLX Wideband wont connect with S300
your conversion table is wrong if you are using a PLX.
Please take a look at the PLX wideband wiring instructions: http://www.hondata.com/techplxwiring.html
Please take a look at the PLX wideband wiring instructions: http://www.hondata.com/techplxwiring.html