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AEM AFR reference to Link g4+ MR2 v1

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Hey there, I'm currently working with a g4+ plug and play for a 91 mr2

I'm trying to get the AFR to work with the link, I got a AEM 30-2310 wideband controller.

I see the ANvolt 1 is used for the factory oxygen sensor.

I figured I could use this wire going to the factory o2 sensor and put it on the white wire (analog out) from my AEM wideband controller

I know you have to change the ANvolt from narrowband to lambda which i did

I also set it to Cal 4 and enter the 0-5v voltages to lamda reference table.

I still can not read my AFRS on the PClink.

any help would be much appreicated...thank you! cheers - Mel

Attach your tune I will take a look. Does the Lambda 1 parameter not give a reading at all or is it just incorrect?

Have you got the brown analog -ve wire connected to sensor ground as well?

I do have a brown wire I connected it to chassis ground.

without the XS loom I don't have a sensor ground.

Attached Files

Your set-up looks ok. Can you explain the problem in more detail - are you getting no reading at all or is it just incorrect?

With the sensor unplugged from the controller, what voltage do you see on pin 33 and what Lambda is shown in PC Link at the same time?

Thanks for the reply!

I ended up getting my xs loom and wired it up analog - to sensor ground and analog + to an volt 4 and inputted the settings and it worked.

Only issue with it, it's reading a few points off than my gauge (ex. Ecu software is 14.4 and the aem gauge is 14.7)

Also I had two questions with this loom.

I'm trying to install my gm 3/8 iat sensor, I have it wired to sensor ground and an volt 5 but I can't find a drop down calibration for the sensor.

Also I have a bosch knock sensor installed, what way is best to wire this? I have shielded wire and I have it grounded at the engine block.

Thanks for the reply.

Only issue with it, it's reading a few points off than my gauge (ex. Ecu software is 14.4 and the aem gauge is 14.7)

You should be able to fix that by offsetting your calibration numbers.

I'm trying to install my gm 3/8 iat sensor, I have it wired to sensor ground and an volt 5 but I can't find a drop down calibration for the sensor.

You would be better to connect it to AN Temp 2 on pin 36 or AN Temp 3 on pin 45. AN Volt 5 doesnt have a internal pull-up resistor you you would need to wire your own to make it work. For the calibration, the GM sensors us the calibration labelled "Delphi AC IAT".

Also I have a bosch knock sensor installed, what way is best to wire this? I have shielded wire and I have it grounded at the engine block.

Signal to Pin 34, ground to pin 39 or 46.

Thanks for the reply, much help!

Do I just play around with the numbers? I have it set to this for the afr

Attached Files
  • Screenshot_20201007_032150_com.google.android.apps.docs.jpg
  • Attachments may only be downloaded by paid Gold members. Read more about becoming a Gold member here.

Thanks for the reply, much help!

Do I just play around with the numbers? I have it set to this for the afr

Attached Files
  • Screenshot_20201007_032150_com-v2.google.android.apps.docs.jpg
  • Attachments may only be downloaded by paid Gold members. Read more about becoming a Gold member here.