Wideband O2 install - LM 1 Relay

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

yeah, but if I do that then i have to keep turning the LM 1 on and off and i will forget sor sure.
I need to find the ignition wire right - a purple one?

And I need 12v switched - from the ECM?

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

Thats why you are using the relay I thought . When the relay sees ignition it will turn on the wb . Cut the ignition and the relay kills power to the wb . Leave the switch in the on postion and remove the units battery .

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

no!

The LM 1 has to be on before the engine starts - says so in the manual.

When you start it the voltage spike can damage the unit, so the starter is a signal to turn OFF the LM -1.

Once the starter is disengaged, the LM 1 comes back on again.

So I need the 12v only when on, and the ignition to switch it off temporarily.

Just going off what the manual says.

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

The manual does say that , I will agree . On my syclone I do use the relay but manually switch on the unit everytime . Innovate Motorsports does have their own LM-1 forum from which their administrator did say :

klatinn
Administrator

Hi,

The relay for the spikes are a problem only if you have a defect starter solenoid. Those can create spikes higher than the LM-1 can handle. Normally not a problem on a race-car that is maintained better than an average daily driver.

Regards,
Klaus


and also:


klatinn
Administrator


Hi Mike,

The sensor power is controlled by the LM-1 using pulse-width modulation. The LM-1 monitors 12V power and regulates the sensor accordingly.

BUT:
If your power fluctuates wildly, the LM-1 cannot account for that. It looks at 12V power not on every cycle, but only about 6 times/second.
So, wild power fluctiations and spikes that are not caught by the LM-1 can overpower the sensor. A way to avoid that is to use a power filter like they use for high-power car stereos before the LM-1. This also filters out power spikes.
The LM-1 itself is protected from those, but the sensor heater is not. High voltage spikes on 12V can be coupled inside the sensor to the sensor cells.

Regards,
Klaus

More can be found here : http://www.innovatemotorsports.com/forums/forumdisplay.php?f=4

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

Ok,

but where is the best place to get the 12v from? I have taken off the panel underneath the steering column and disconnected the hood release, but cannot see any easy access points. Do I need to splice into a wire?

Getting the fuse box off (so I can get access to the rear) is not an option you say?

How are people tying into their lighting? For the gauges. I plan to do that while I am in there.

Another simple job that is taking hours....

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

I took my panel off and took a pic for you . These are the wires I tapped into for my remote start and they will work fine for your relay . I labled the relay in the pic so you can get this going .This harness is just to the right of the bottom of the column .

Pink is ignition and the red is 12v+ .

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

Thanks man.

I know from today how much of pita that is. Will have a go at it next week.

cheers,

Mark

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

Have fun , it shouldnt be that bad .

 

[bezerk]

Re: Wideband O2 install - LM 1 Relay

o love putting wires directly into the fusebox, that's why they leave open ports to it, you can use a shrink on connecter and put them into the open port at your fuse panel, but that's just me.
whatever works for you

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

o love putting wires directly into the fusebox, that's why they leave open ports to it, you can use a shrink on connecter and put them into the open port at your fuse panel, but that's just me.
whatever works for you

I threw out 4 different ways for him to hook it all up , he can choose which of the 5 ways posted is easiest for him .

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

thanks guys! I appreciate it. All I am waiting on now is the relay mounting component and then it will be ready to go.

The biggest problem I found was identifying the correct leads. The cololurs do not correspond to the manual so it was a lot of hit and miss. I got it though and they are all wired in with scott connectors as per yours MRKING and I am just waiting for the bits like I said!

Would love to make some progress. All I seem to do is buy spares and talk about plans etc etc!

If I made this difficult then it was only coz it got personal!

cheers,

Mark

 

[MRKING]

Re: Wideband O2 install - LM 1 Relay

So you gonna leave the lm-1 on w/o battery and let the truck turn it on/ off via relay , or flip it on and off when you get in ? You said you were concerned with the voltage spikes , so I wasnt really sure what you were going to do . Either way I'm glad you got it squared away .

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

Squared away - military by any chance Michael?

OK, so here is the problem now....

I calibrated the sensor in air about a week ago and all was well.

I then identified the correct cables so that the LM 1 turns on with the ignition, but goes off with the starter, so there are no spikes. The relay worked fine and the LM 1 does as well.

On start though, it says the car is too rich - about 10 on AFR.

(I have the analogue cable connected to the old plug and tails, so the ECM is seeing the narrowband output from the analogue bit of the LM 1).

Gradually the AFR increases, but the car then starts to idle badly, past 14.7 as far as 20 (obviously very very lean)to the point where it almost dies and you need to floor the gas.

If I leave the analogue pin out, then the idle remains at around 14.7 +/- 2.

What is going on?

Have I calibrated the sensor wrong? I don't think so as it idles at 14.7

Please help here guys

I am so relieved that the f*****ng relay is working though - what an ordeal that was.

Thanks in advance,

Mark

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

OK - that problem solved = I am a retard. I plugged in the Serial cable to the AUX output of the LM 1. It was dark an midnight ok and I had a half rundown torch! (see bonehaed thread D

Now I need to get the analogue talking to the ECM. Obviously the narrowband only reads 0 -1000 mV.

What should the settings be on the analogue out part of the LM-1?

At present I have 0 V = .958 lambda
1 V =1.022 lambda

Is that right or should it be the other way round?

Is the range right or should it be more? I am getting to the point where I am going to need to connect the wideband to the ECM.

Any help always appreciated!

Thanks,

Mark

 

[Quickstop [UK]]

Re: Wideband O2 install - LM 1 Relay

^bump^