:::RHMT::: Real Home Made Turbo

General Category => Engine Management => Topic started by: si 1 on June 13, 2010, 01:59:58 PM

Title: lm-2 hooked to ecu
Post by: si 1 on June 13, 2010, 01:59:58 PM

Alright just need a yes or no if i got this right. Trying to hook this lm-2 to the ecu for data-logging on a p28.

1. Is this the harness i need to analog out for the lm-2
LM-2 Analog I/O Cable
https://www.upscaleautomotive.com/popup.aspx?src=images/Product/large/innovate3811.jpg (https://www.upscaleautomotive.com/popup.aspx?src=images/Product/large/innovate3811.jpg)

2. Would i hook it up the same way as it shows to hook the lc-1 up
http://www.lukekailburn.com/lc1.html (http://www.lukekailburn.com/lc1.html)

3. Reset my analog out put to
0.1v = 7.35 afr

3.25v = 22 afr


Thanks for any help you guys can give me iv been researching this as much as i can just need a better idea before i buy the harness.

Title: Re: lm-2 hooked to ecu
Post by: Joseph Davis on June 13, 2010, 03:39:04 PM

Eh.

There are two analog ouputs, you want to hook the (+) to whichever pin you are logging from.  Connect the (-) to the thermostat housing ground. 

I like resolution, and the extreme ends of the spectrum that Innovate WBs read is pretty useless.  I set 10-20 AFR to 0-5v, unless dealing with an unmodified pin D14 and then I'll probably leave it that way anyhow.  Being able to read a high 16 is fine for the intents and purposes of tuning a car.

Title: Re: lm-2 hooked to ecu
Post by: si 1 on June 13, 2010, 09:45:48 PM

You might hate me but what do i need to do to modify the d14pin. thanks for the help again JD i dont think very many people use the lm2.

Title: Re: lm-2 hooked to ecu
Post by: Joseph Davis on June 13, 2010, 10:55:50 PM

The pgmfi.org wiki has Mark Lamond's notes on how to modify the D14/stock O2 circuitry to accept a full 5 volts.  I've only followed it once, and anything I told you would be a cut and paste of his work, anyway.