I've got my Hydra out and sold, now I'm starting to think about the installation of my MSPNP Pro. I've got the current model AEM UEGO wideband (30-0300), which has CAN outputs. I thought I read about someone else here being able to use those for a digital signal on the MSPNP Pro, but I can't find that post now. It seems like a better/more modern solution than using analog and having to worry about ground connections as much.

Does anyone know about this, or am I making it up?

 

From what I understand, you can directly hook up CAN connections to MS3 if you have firmware 1.5.1 or later, but have to shut off Megasquirt CAN communication since AEM reads on another protocol (so no go if you have a CAN expansion board or CAN gauge). The older method is to purchase one of these, which converts AEM CAN to MS CAN: MSLabs CAN Wideband Module

 

I have the same gauge and have it hooked up to my MS3 via CAN with no issues. As ace said you have to shut off CAN broadcasting, and then enable the AEM protocol on the CAN/EGO/GPS page (or whatever the equivalent is on the MSPNP Pro)

 

Sam, if you are interested in keeping CAN, you can get the MSlabs CAN wideband adapter.
MSLabs CAN Wideband Module

I have one and it works great. I will be selling mine soon as well if you are interested.

 

Okay, I'm finally setting this up, but something isn't right. I've got CAN Broadcasting turned off, and AEM X UEGO selected under EGO Data, but it's pegged at full rich with the engine off. Is there some other setting I'm missing?

 

Did you fix this? Got the same issue, setup as above but getting 0.00 as AFR.

 

can you please share details? or is this already laid out somewhere that we can find?

 

Have you tried turning off "29bit Megasquirt CAN Enable" in the CAN Parameters tab? Only turning off Dash Broadcasting would keep the main Megasquirt CANbus alive, which is likely interfering with the AEM bus.

 

So far I've got the following set:



Things I'm unsure of / points worth mentioning:
Do I need to detail the specific can message details in "CAN Recieving" (Presume not given CAN EGO has its own dedicated setting section?)
CAN wiring itself (I'll double check my loom and ms3x)
I also have the AEM's analogue output hooked up (could this interfere? I doubt it)
My CAN id is set to ID1 in the wideband (I've tried other id's also)
I've wired "aemnet+" to CAN-H, aemnet- to CAN-L ( as per wiring in manual page 2: http://www.aemelectronics.com/files/...ns/30-0300.pdf )

 

I finally had a chance to look at mine again this weekend, and I had just missed one setting as I suspected.
I figured out that I just needed to change the EGO Port setting (under Fuel Settings > AFR/EGO Control) from O2 to CAN and my AEM X Gauge started working perfectly over CAN.

 

Question on how you wired this guy in. According to AEMs directions, the 30-0300 should be wired for AEM net through the white/blk (+) and green/blk(-). Did you use the factory narrowband O2 input pins on the MS3pro or the CAN-H and CAN-L on either the options plug or the bottom ECU side unused pins?

Also, just to confirm Sam, you are running 1.5 software which is what DIY recommends for AEM net functionality. 1.4 seems to have all the same tables displayed and if I can avoid using engine states which don't seem to be reviewed well here, I would like to stick with 1.4 but have the gucci CAN interface that this "digital" sensor seems equipped for.

Thanks

 

Pre 1.5 does not support AEMnet.

The connections are made to can-h can-l on the ecu. The narrowband input will be unused.

 

Excellent, thank you. Do you think that CAN O2 input functionality would be a reason to use 1.5? Or does the conventional logic still apply. Perhaps another question is does the MSLabs CAN bus adapter work with an MS3Pro-PNP and would that bridge the gap between 1.4 and 1.5 firmware without having to use engine states for tuning?

 

It was enough for me. Engine states haven't created any problems for me.

 

 

This might seem like a silly question but if you are wiring in your wideband onto the canl and can wires, does that prevent you from using the same can wires to a standalone gauge? I guess better put, can you run 2 separate can devices to the megasquirt?

 

The answer is in the second post.

 

That answer seems more specific to the AEM setup though since their protocol is different than a normal CAN protocol. I guess my question was more in theory for something like the conjunction of a CAN expansion board with a CAN gauge. Can both be used simultaneously or does enabling can for one preclude any other can device from running as an input / output?

 

I think it's going to depend on what CAN protocol each device is using so the answer is going to vary. Exactly what hardware are you wanting to use?

 

I was looking into using this gauge
https://perfecttuning.net/en/gauge/5...sal-gauge.html

Possibly coupled with the mslabs canbus wideband controller . Unsure if I want to pursue the canbus wideband controller but for sure I was interested in that gauge. I guess I wanted to know if it would limit me in the future as to what I could use.