Problems with LC-1 Wideband and DSMlink

[95RedTsiAwd]

Hello all,

Here is the problem, just got an Innovate LC-1 Wideband o2 and controller. DSMLink is working as designed, has been for awhile. I hooked up the wideband, hooked it up to my laptop, installed and ran software, free air calibrated it, put it into the exhaust stream about 15in from the turbo. Started car to test it, and with Logworks the wideband is working PRISTINE The LC-1 is very nice with a great interface.

Now here is the problem. When I got the car the Rear O2 sensor was clipped. So I thought perfect, I can just tap into the wires running into the ECU from where the O2 used to be. Oxygen sensor is a 4wire. So I tapped a wire from the lone white wire on the harness that went to the o2 and tapped it into the brown (0-5v) wire on the LC-1 controller

I have the newest version of DSMLink off their website, opened it up, looked at the captured values and found no listing for the LC-1. According to a few people I talked with, they set up the LC-1 to emulate a TechedgeWB which is listed in DSMLink.

Went into the LC-1 Programming software and set it to 0v = 9.00afr and 5v = 19.00afr, which according to techedge's website is the correct range for there o2 sensor. (i.e. emulating there calibration)

Set up DSMlink to display the TechedgeWB on the SecO2Sensor. Started up the car and the laptop. Display of AFR is perfectly correct on the laptop and their little analog gauge laptop display is showing a correct changing AFR. I check DSMlink and it just shows a straight line graph at 19.00afr and never changes Again the laptop is displaying the correct info, DSMlink is just straight lining.

? is, what did I do wrong. Obviously the O2 sensor and controller is fine, Did I get the wrong wire on the ECU sec o2 harness? or do I not have DSMlink set up correctly somehow??

Sorry for the long post, I just wanted to be specific on everything I already did and tried. Please help with any thoughts or ideas on why DSMLink won't log it.

Thanks alot for your time.

 

[Byrd]

I'm about to invest into the same setup you have and would be interested to know the answer as well.

But, one could also just tune with the wideband software to get the AFR's correct. Then mess with timing in dsmlink. Kind of a PITA but one way around it.

 

[95RedTsiAwd]

I had considered that, however, since the LC-1 is simply a wideband o2 controller it really has no way to log a/f ratios in relation to anything like boost, rpm, or when knock is occuring.... hence the want to be able to log it with DSMLink. I'll definetly keep you posted if I learn anything more about why this is not working. I'm beginning to believe that I somehow have the wrong wire on the 2nd o2 sensor harness. I could have swore that the white wire on the harness was the one I needed to tap into, but maybe I am mistaken.

 

[alexg1323]

sounds like something is definatly wired incorrectly, you should probe the wire right before the ecu it appears to be pin 75 and check the voltage. If its reading a constant 19 a/f ratio sounds like it might just be wired to straight 12 volts. Check your innovate grounds aswell.

 

[scottsee]

You connected the wrong wire to the rear02 ecu input (pin 72 or 75 I forget). I did the same thing. I have the PLX-M300, and hooked up the grey (0-5v wideband) wire to the white rear o2 wire, Dsmlink value was 10, while the plx device showed 14.7. I replaced the 5v wideband wire with the white narrowband wire, and presto.

Unless I'm mistaken their is the same 2 wires from your LC-1 device.

 

[95RedTsiAwd]

YAY it works!!! , thanks everyone for the replies. One thing I forgot to mention was before I got this car it had a 6-bolt swap performed.

I was tapping into the correct wire at the sec o2 sensor, but unbenounced to me, it was also cut up by the ecu when the swap happened. I found pin 75 on the ECU (thanks Alexg1323) and tapped my little brown wire on there and Kablam!!! was logging within +/- .1 afr on DSMLink compared to my Laptop plugged into the serial on the LC-1. Thanks so much

Now time for some 3rd gear pulls

P.S. it's very important to calibrate the LC-1 to match one of the Wideband sensors in the list in DSMLink, since Innovate doesn't have a WB listed. It will be very inaccurate with out perfoming this. It's very easy with the included LM programmer. Happy Tuning.

TechedgeWB - 0v = 9.00afr 5v = 19.00afr
PLX WB - 0v = 10.00afr 5v = 20.00afr