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how-to: Log AFR from the LC-1 w/o a serial cable

Old Aug 29, 2013, 11:45 AM
  #466  
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Originally Posted by EvocentriK View Post
Not sure, never been in this situation with a 9. If you log 3C, you were getting a range of values but none were making sense when you applied the formula?

What made you change from logging 3C unpatched to patching?
yes the numbers were not making any sense, i change because i thought thats what i suppose to do using the patch the thread listed.
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Old Sep 1, 2013, 10:02 AM
  #467  
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Were you trying to eliminate CEL? If it was working before fine why patch. You can always wire o2 to another ACD input and log that.
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Old Sep 28, 2013, 03:16 PM
  #468  
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This is my 3rd time rewiring it.
1st time I did everything right but I didn't connect either brown or yellow analogs so I was just rreading afr from the gauge. Lm programmer didn't work
2nd time I hooked yellow to yellow from lc-1 to gauge then brown to ecu on pin 75 did the o2 delete and edited the mut12 definition on my tephra rom v7
My gauge just kept flashing 7.4 still no pm programmet
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Old Sep 28, 2013, 03:22 PM
  #469  
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So I cut all the wires and I'm going to re-wire it again

I have the 6 wire lc-1
Brown-output 2 is going to my rear o2 pin 75 on my ecu
Red-12v supply
Blue and White get grounded together
Black- calibration wire goes to led, pushbutton then ground the 2
Yellow- going to ground it cuz I wont be using it

Gauge itself
Red- hooked to same 12v as lc-1
Black- ground
Yellow- ground that as well?

What am I missing? I might have hooked up the black calibration wire wrong the 2nd time hence why it would only flash 7.4 and the Cal button didn't do anything

And why can I not launch lm programmer. I've tried the db9 to USB and I've tried the db9 to db15 to hook it to my comp. I'm lost. I've updated evoscan and the lm programmer. Did the driver install for serial to USB I'm running windows 7 64bit
I log afr on evoscan through lc-1 afr evo 8 location ID is 12 and the afr readout is slow and I think inaccurate.

Last edited by ApacheToYaDome; Sep 28, 2013 at 03:25 PM.
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Old Jul 16, 2014, 04:20 PM
  #470  
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so I have a 9 running SD and tapped into my LC-1's brown wire which is also supplying a signal to my DB gauge. Evoscan has this formula 10.00+(16.99-10.00)*x/255 also the requestID is 3C

I'm seeing around 13.3 in Evoscan reading through the ECU while using the USB to Serial adapter and the gauge shows around 14.7. Is there another formula being used for LC-1 or is there another requestID?

I would love to use this method instead of using the usb to serial adapter.

I have read through this but I haven't really seen anything concrete as far as a new formula. I have seen a mention of using requestID 12 but others have 3C without issues

Last edited by vmrevo9; Jul 16, 2014 at 04:22 PM.
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Old Jul 17, 2014, 07:17 AM
  #471  
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Originally Posted by vmrevo9 View Post
so I have a 9 running SD and tapped into my LC-1's brown wire which is also supplying a signal to my DB gauge. Evoscan has this formula 10.00+(16.99-10.00)*x/255 also the requestID is 3C

I'm seeing around 13.3 in Evoscan reading through the ECU while using the USB to Serial adapter and the gauge shows around 14.7. Is there another formula being used for LC-1 or is there another requestID?

I would love to use this method instead of using the usb to serial adapter.

I have read through this but I haven't really seen anything concrete as far as a new formula. I have seen a mention of using requestID 12 but others have 3C without issues
Try this formula instead=> =(0.05898*x)+7.35

Last edited by evo8426; Jul 17, 2014 at 07:37 AM.
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Old Jul 17, 2014, 08:00 AM
  #472  
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Originally Posted by evo8426 View Post
Try this formula instead=> =(0.05898*x)+7.35
Awesome I'll give that a shot when I get home tonight. Thanks
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Old Aug 16, 2014, 02:10 PM
  #473  
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i tried this formula and it brought me closer. it now reads .3-.4 richer than logging thru the serial to usb adapter. i tried adjusting the formula but it was worse. any ideas?
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Old Jul 4, 2016, 10:43 PM
  #474  
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Not sure if this is has been done yet or not but, I am removing my rear o2 sensor from the car altogether and will just put the wide-band in its place. Instead of going to the ecu pin 75 i plan to just tap into the single wire from the harness where the oem sensor would plug into. Has anyone else done it this way?
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Old Jul 9, 2016, 07:51 AM
  #475  
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Originally Posted by MrSquirr3l View Post
Not sure if this is has been done yet or not but, I am removing my rear o2 sensor from the car altogether and will just put the wide-band in its place. Instead of going to the ecu pin 75 i plan to just tap into the single wire from the harness where the oem sensor would plug into. Has anyone else done it this way?
I found it more convenient to tap into the wire inside the car. Either way works, no need to put another pin into the ECU.
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Old Jul 10, 2016, 03:43 PM
  #476  
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Originally Posted by stokEd View Post
I found it more convenient to tap into the wire inside the car. Either way works, no need to put another pin into the ECU.
my next question for in the MUT tables is it safe to assume that table 12 is in (row 1x, column 2) in that cell where they meet up?

Last edited by MrSquirr3l; Jul 10, 2016 at 09:04 PM.
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Old Jul 13, 2016, 09:37 AM
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I would like to know the solution to this as well. I have the same issue on two cars that have gotten widebands. If on a Haltech or AEM we dont have any issues, but stock ecu logging seems poor.

Originally Posted by vmrevo9 View Post
i tried this formula and it brought me closer. it now reads .3-.4 richer than logging thru the serial to usb adapter. i tried adjusting the formula but it was worse. any ideas?
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Old Jul 22, 2016, 08:15 AM
  #478  
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Originally Posted by dsm nexus View Post
I would like to know the solution to this as well. I have the same issue on two cars that have gotten widebands. If on a Haltech or AEM we dont have any issues, but stock ecu logging seems poor.
The LC-1 has an adjustable AFR output range for the 0-5 V wideband analog signal. Make sure that you are using a formula that matches the output range you have specified using the Innovate software for programming the LC-1. If you are certain that the correct formula is being used, and the value logged through the ECU is still off by more than 0.2 AFR from your innovate gauge, then there is a substantial voltage offset somewhere in the 0-5 V wideband circuit. The usual issue is placing the ground for the 0-5 V circuit too close to the ground for the LC-1 power. It needs to be in a separate location, preferably as close as possible to a ground location used for the ECU sensors. It takes a bit of attention-to-detail to make this work right, but it is all covered in the first post of this thread.
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Old Dec 8, 2017, 01:22 PM
  #479  
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Hey

I have ID 88580714 Tephra v.7 and want to log WB LC2 from MUT12. I have to change it also to 8409(changed that and just numbers does not add up) or someone need to check into to my ROM and check the right address?

EDIT: All works fine number 8409 is ok just needed to setup analog out nr.2

Last edited by taavisev; Dec 9, 2017 at 11:38 AM.
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Old Jan 28, 2018, 11:26 AM
  #480  
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Bumping and old thread i know. Anyone have the formula for the new AEM Xseries Wideband, its voltage range is .5v = 8.5AFR and 4.5v = 18.0AFR

Also shows
AFR=(2.3750 * Volts) + 7.3125
in the install instructions

Link to instructions
http://www.aemelectronics.com/files/...ns/30-0300.pdf
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