LC-2: Digital Wideband, anyone try it out?

[Tinbender59]

Mine is working I'll look into the pin outs for you
LC2!

[bimbleuk]

Despite my original gauge (MTX-L) not talking to my laptop for setup, which I'm assuming is more to do with the early firmware being a bit flaky. It's been very reliable as a wideband gauge and sensor with serial out. The new gauge on 1.3 firmware has no problem with Windows 8 or using an emulated serial port via a dongle.

As soon as I had both gauges installed and running I noticed straight away I had an imbalance in my ITBs. They were fine at idle because I'd used a flow meter to setup them up and above a certain throttle angle again they equalised simply because of their size. However just as you lifted off idle one gauge would spike lean and then recover quickly as the RPM increased.

By adjusting the valley linkage by a very small amount on one side I was able to move the spike to the other bank and of course by backing up a fraction I could balance them. Now I'm talking such a small amount of movement it was barely noticeable yet on either gauge it was blatantly obvious. It appears I'd missed this on the narrow bands as they were reacting too slowly compared to the almost instant MTX-L gauges.

I may not even have noticed this driving most of the time on the narrows but it did clean up the fast idle emissions significantly as now both banks are working more evenly.

[Tinbender59]

Thanks for all your help men! I have solved the problem and hopefully this info will help future LC-2 users.

The wires from the LC-2 WB controller (4-pin plug) are as follows
* Black
* Blue
* Red
* White

I have now learned of 2 separate examples where the corresponding serial cable plug wires (although the same colors) do not match up when plugs are connected. Refer the controller side of the plug when terminating wires to the RJ11 connector.

The required colors and positions for the RJ11 connector are as follows:
1. Not connected
2. White
3. Not connected
4. Red
5. Black
6. Not connected

Attachment 16321

As long as the connected wires on the RJ11 plug match the controller side of the serial cable connector this should work.
Thanks again to all those who took time to help.

Regards,

MarkR8

Hum???? Mine is close but 4 is NC, 5 is RED, and 6 is BLACK I just rang them out!!! ????? the colors in the drawing are just for reference


SEE ALSO

https://forum.efilive.com/showthread...hat-goes-to-v2

[Stelth]

Hi Guys

I have installed a new LC-2 but i can't read anything through the V2,

I have read this whole thread 2 times and will go back and read it all again ,

The LC-2 comes with a serial cable that has a 9 pin female and the V2 comes with a serial cable with the same 9 pin female ,

I went to Jay car and bought a 9 pin male to male joiner but can not read any data .

Do i have to cut one of the cables and re configure because the male to male adapter swaps everything around ?

I have installed and calibrated the LC-2 unit correctly and it is showing a solid green light and i have also setup the V2 using V8 softwaer to read the serial when BBL

I am so confused ,

Any help would be appreciated .

cheers

John

[ttls1]

I had to swap a couple of wires on mine to get it to work. It may have worked had I used a "null modem" adapter.

[Stelth]

Ok i am starting to figure this out ,

Firstly i do not think the 9 pin male to male adapter i have is a null modem .

Secondly there is conflicting info on the correct RJ12 wiring between the 3 diagrams below

and this and also this

So is it correct to say that the Red wire from the LC-2 goes to #1 on the RJ12 plug , white from the LC-2 goes to #2 RJ12 and black+blue from the LC-2 goes to the #5 on the RJ12 plug ?

cheers

John

[joecar]

In this picture the colors are not related to wire colors:


Molex connector pinout:
Pin 1 = Rx (white wire)(red cavity above)
Pin 2 = Tx (red wire)(yellow cavity above)
Pin 3 = Gnd
Pin 4 = Gnd

RJ12 jack is shown with an extra pin between blue and red.

[joecar]

LC-2 red -> FSV2 RJ12 pin 5 (black)
LC-2 white -> FSV2 RJ12 pin 4 (red)
LC-2 black+blue -> FSV2 RJ12 pin 2 (white)

[Stelth]

Thanks Joecar

I will try and make up a Molex to RJ12 cable and not use all the 9 pin stuff

cheers

[joecar]

Cross-link: Logging-2-LC2s-in-series