EV Play + Comma 3x install - advice

[gerrylum]

@gerrylum It was using the OBD power at the time. Not going to use Comma 3x until I can run the fuse tap that I got from you yesterday and bypass the AXM.

Maybe tonight if I have the time and patience to remove the harness and refit it. I’ll update.

That matches my theory. Even if you’re powering the system through the OBD port, leaving the 12v AXM connection in place can backfeed power into the AXM. This can cause the backup sensors to malfunction since the harness is still pulling 12v from that connection (the backup sensors).

We’ve seen this issue with people using a fuse tap: their front lightbars stay on even when the car is off. The cause is the same—the AXM is still feeding 12v through the fusetap and into the light bar because the original 12v connection wasn’t removed.

When using an alternate source of 12v, it super important to remove that AXM 12v connection as well. Comma really ought to stop including the 12v AXM connection on their harnesses.

Sponsored

 

[MTBLeibo’s R1T]

I installed both.

EVPlay seems to be working g as expected and looks like it will be amazing.

I have not gotten Comma AI to work yet.

I installed everything as I believe is the current best practice. Allowed truck to sleep and kept it that way while installing. Struggled to get the Lukas harness in the AXM but did it after a hour of trying and walking away and trying again. Plugged everything together as I believe is correct including longitudinal add on. Used Lukas power tap. When I woke it up all was looking fine initially. Comma booted up and I installed openpilot from the startup screen. Went through tutorials. Then saw the “no panda”. Took it for a drive and none of the sensors are working, no cruise control, etc.

Did a hard reset rechecked all cablesand same findings.

now waiting for a deep sleep in the hopes that it will fix it.

any other suggestions?

 

[gerrylum]

Comma booted up and I installed openpilot from the startup screen. Went through tutorials. Then saw the “no panda”. Took it for a drive and none of the sensors are working, no cruise control, etc.

Standard openpilot isn't compatible with the longitudinal upgrade. In fact, the "black panda" that the upgrade uses has been depricated by Comma, so that's why you're getting the "no panda" error.

The Longitudinal Upgrade is only compatible with the latest builds of Sunnypilot. I recommend installing "sunnypilot/staging". Try that and see if it fixes your issue.

 

[MTBLeibo’s R1T]

Gerrylum, thank you again for the help. You are a tremendous resource for all of us. Greatly appreciated.

 

[gerrylum]

Gerrylum, thank you again for the help. You are a tremendous resource for all of us. Greatly appreciated.

Let us know your progress! Would love to hear if you get it all up and running. You mentioned sensor issues which this might not fix, but it's the first step to your issues and I hope that fixes it. Let us know if it doesn't.

 

[MTBLeibo’s R1T]

Hmm. Closer but not there yet.

 

[MTBLeibo’s R1T]

 

[MTBLeibo’s R1T]

So do I have to call Lukas for a replacement or is there another potential fix? Everything is connected correctly as best as I can tell.

I suppose the replacement might take long enough to arrive that the skin on the back of my left hand will have grown back again by the time I have to wrestle with that connector again.

 

[gerrylum]

Can you should

So do I have to call Lukas for a replacement or is there another potential fix? Everything is connected correctly as best as I can tell.

I suppose the replacement might take long enough to arrive that the skin on the back of my left hand will have grown back again by the time I have to wrestle with that connector again.

Can you post some pics of how everything is connected? I only see one cable going into the back.

 

[MTBLeibo’s R1T]

 

[gerrylum]

OK, cool, now the next question is which cable are you using for which port? The cables are not interchangeable. The main port requires a USB-C 3.1 cable, and the upgrade uses and comes with just a standard USB-C cable. If you switch them, the standard cable may be able to provide power to the Comma, but not the data.

 

[MTBLeibo’s R1T]

Top with right angle connector goes here:

 

[MTBLeibo’s R1T]

Bottom one goes here

 

[gerrylum]

It looks good. The thicker cable should be going into the main port, and the thinner one into the bottom port. If that's the way you've got them connected, another thing you can try is unplugging the thicker cable, flipping it 180 degrees, and plugging it in again.

 

[MTBLeibo’s R1T]

The bigger fatter extension cable that is male to harness female to the right angle is the one on top of the back of the comma. The other is the skinny version. USB c to usb c.

Sponsored