MoTeC Global Forum

Like the topic says, is it possible to wire the PLM to feed the M4 , so that whenever I log I can get a lambda reading?
It is hard to locate the 4 wire sensor. Even more better I think to use the PLM would be better.

Yes, you can use the PLM as a lambda input into the M4, I dont think you even need the "lambda" option enabled in the M4 for this setup to work. The PLM manual has details on the connection and settings.

Alternatively you could use any other wideband controller that has a progarmmable analog output such as techedge, 14point7, etc (I wouldnt bother with innovate). I think the M4 lambda input will only take 1.2V max.

Also, if you already have the lambda option enabled in your ECU then oxygensensor.net is a good source for the old LMS11 4 wire sensor.

Thanks Adam, I know that the M4 has been around a long time. I wanted to replace the Wideband with a faster and more accurate one , such as the PLM. I just want to know where to connect it to on the existing 4 wire plug on the harness.

I wouldnt say that the PLM would be significantly faster or more accurate than the old LSM11 in most situations. In very rich or very lean conditions probably, but within the commonly used lambda range I wouldnt expect you to see much difference.

Take a look at pg 40 in the PLM manual, that shows how to connect to a M4, then Pg 5 gives you the settings for both devices.

Thank you for the info. I have download the PLM manual and it is straight forward. From talking to other tuners worldwide they seem to like the PLM, they all talk about the faster response of it. I will try both.