I'm in the process of wiring up my MS to stuff and pulled out my analogue cable for my Innovate Motorsports LM1 data logger that I was going to hook into the MS for wideband.

The analogue cable has 3 wires come out of it, white, red, and a non-insulated copper wire. I'm assuming the non-insulated copper wire is similar to the shielded metal mesh wire that the stock CAS wiring has? The copper wire seems to surround the other 2 wires inside the cable, so I was thinking it was the same and it is meant to be grounded and keeps away any interference that may occur. Is this correct?

What about the other 2 wires, white and red. Does anyone know which wire goes to what on the MS? I've looked all through my instructions that came with my data logger, and unless I'm missing some booklet it doesn't say anywhere which wire is the analogue output (signal) or anything. I checked their site really quick and couldn't find anything, but I'm going to go searching their forums now to see if I can find an answer.

If anyone has dealt with the LM1 or LC1 or anything with an MS, though, and used the analogue output for wideband support on their MS, please let me know how you wired it in, thanks.

 

This is correct... if that wire surrounds the other two, and grounds on one side, it's a shield.

I'm buying my lc1 soon for my project car, so when I have it, I'll post what wire does what if nobody else has.

what you can probably do is after your free-air calibration, one of those wires should be a 0-2v signal, and the other should be 0-5v... you could measure the voltage of each of the wires in question.... there should be one that will measure close to +5v with the sensor just sitting there in free-air, the other should be close to +2v... the one that gets hooked to the megasquirt is the +5v one... Also... you should have a ground wire that comes out of the wideband controller and goes to the megasquirt... that's the reference ground so the controller can generate its voltage from what the megasquirt considers 0v.

Ken

 

Hmm, ground wire out of the controller, not sure where that is.

The controller has the following according to my booklet:
- Serial port for laptop hookup
- Analog out (as described above)
- AUX in (not sure for what, possibly the aux box thing they sell for running more sensors for logging)
- Sensor
- Power (cig lighter)

 

Just went to Innovate's website again and can't believe I didn't notice this last time I read.

"6-ft. long, mini to stripped-and-tinned, matching LM-1 analog output spcifications. The cable has (2) Analog Outputs 0-5 volts that are fully programmable with the LM-1 software."

So either wire (red/white) should work then?

 

I guess... I was under the impression that one of them would be 0-2v as configured from the factory though... You still might want to check that.

 

Yah I will, but what about the ground wire, any ideas?

Not finding any info in my booklet about a ground wire from the controller

 

I don't know then, if that's the case then I'd suggest making sure that the innovate unit is grounded to wherever you're grounding the megasquirt. I'll have to take a look at the innovate manual to see if there's anything in there about a ground...

 

The innovate unit just plugs into the cig lighter and uses power/ground there as far as I know, because other than that all I have hooked up (currently) is the O2 sensor.

 

Yeah, I think in a permanent install, you'll want to make sure the lm1 shares the same ground-point as the megasquirt.... otherwise the megasquirt and the lm1 will have different reference grounds, and the megasquirt will measure a different AFR from what the lm1 thinks it's reporting.

The techedge controller actually has a ground that you run to a megasquirt ground pin specifically so that the controller-generated voltage and the voltage measured by the MS are the same.

Ken

 

Thanks for all your help here and on AIM Ken

I'll let you know tomorrow what I figure out and if I have any more questions, and I'll update this after I finish the setup probably.

May not be until tue or thur, though, because I need to catch up on my reading/homework for school on monday, and monday is a long day for me so I likely wont be working on the MS. Either way, I'll update this eventually for anyone else that might have this question in the future.

 

Mini update.

I programmed the LM-1 controller so that both analog output wires show 10.0:1 @ 0v and 20.0:1 @ 5v so essentially I can use either one. I'm still going to check the voltage of the one I choose, obviously, to make sure but it seems like it doesn't matter from the programming info.

On another note, though, I'm still wondering about the permanent installation of the LM-1. The only way to connect power is through the 1 jack on the controller from what I can tell, normally this has a cig lighter connection on the other end. I went to their website and forums to search and see if they sell another cable that just has wire on the end for power/ground, but it doesn't seem like they do and I didn't find a whole lot from searching the forum. The manual also doesn't say anything about the cable itself, just precautions and how to set up the relay.

I was wondering, since the cig lighter connection wires are red/black (power/ground I MUST assume), is it okay to merely cut off the connector on the end of these wires and strip back the red/black wires are merely use those to hook up through power and ground? I don't know if this type of wire is special in some way, which is why I ask. That way it still used the same jack for power on the controller, and after I strip back the wire I can easily run power and ground to whereve I want/need to. Make sense?

 

you should be able to do what you're saying, it's what I was going to suggest anyway...

 

Sweet