Comma AI self driver assistant

[Ajzride]

None of those affect compatibility directly. I say that because some XLT's and all Pro's don't come with ACC and the advanced version of LKA.

Just to clear up some confusion. All Lightnings have “Lane Centering Assist“, what you call advanced lane keep, built into the rack and pinion. Fords firmware just blocks it if the ACC radar isnt detected or has error codes. If you add ACC to an XL, Lane Centering Assist will work.

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[lowcutkilt]

I have a 24 Lighting Flash with no issues using Comma AI.

Sent you a DM, very interested in the CommaAI for my '24 Flash but thought it was a no go. This gives me hope

 

[Ajzride]

Someone on my youtube channel today said they were able to eleminate the startup errors without a harness extension by putting ferrite chokes on the comma power cable (between the ODB2 port and the harness box). I cant understand why that would work, but it is worth having someone else (who doesn't have an extension harness yet) test out.

 

[Drayday55]

That's a good idea. I only have modified harnesses now but I have one coming in the mail. I'll give it a shot. Did he say what size? I have choke for my treadmill motor mill. It's big but I'd be curios to know the smallest we can get away with... but i thought thay the power from the obd2 wasnt required for the comma to run?

 

[Ajzride]

That's a good idea. I only have modified harnesses now but I have one coming in the mail. I'll give it a shot. Did he say what size? I have choke for my treadmill motor mill. It's big but I'd be curios to know the smallest we can get away with... but i thought thay the power from the obd2 wasnt required for the comma to run?

It’s not. I guess we should also try with comma power unplugged and a short harness.

 

[PaulStew]

Someone on my youtube channel today said they were able to eleminate the startup errors without a harness extension by putting ferrite chokes on the comma power cable (between the ODB2 port and the harness box). I cant understand why that would work, but it is worth having someone else (who doesn't have an extension harness yet) test out.

Have you guys been able to test out the ferrite chokes?

 

[Ajzride]

Have you guys been able to test out the ferrite chokes?

Andre was going to next time he got a short harness to modify. Since my truck is an ICE i don't have any issues with the stock setup.

 

[PaulStew]

Andre was going to next time he got a short harness to modify. Since my truck is an ICE i don't have any issues with the stock setup.

If you point me to the ferrite chokes to buy on Amazon, I’d be glad to try. I’m still using an unmodified harness with the annoying warnings.

 

[Ajzride]

If you point me to the ferrite chokes to buy on Amazon, I’d be glad to try. I’m still using an unmodified harness with the annoying warnings.

Do you have the old style harness or the new one? I found out with the Mach E this weekend that they behave differently for some reason I can't decipher yet.

The first test would actually be to just unplug your ODB2 connector and see if the errors go away. If they do, then buy these:


https://www.amazon.com/20pcs-Clip-Ferrite-Suppressor-Diameter/dp/B0CSXZWGD6/ref=sr_1_3?crid=1IGXPEU69523W&dib=eyJ2IjoiMSJ9.rdCMnR6pY0gdH79daxUhaH5CV6DSA9a8YfGH9OF8w8GXKPutH2MdAv9ypiSX_FdlvbswYJ-9JqZMdYM8a0LOx7GL434YGjn3x5n0eq32miiUvo5XQjzY-ywT7KlzvcXIXKNmALFYFO74udnNzmvPB5t_K-NZp67c12UnenkxDVq9mOxKQs3UhpekYk5-nsq5SFRbnPUumW2_FScyKyzBba-Gvvy8WqiHnAns5oRNTjI.BGglZGz26eeK1nNr3f3s_7EPmDvcSsSN1MAYFFx8bsQ&dib_tag=se&keywords=ferrite+choke&qid=1744665737&sprefix=ferrite+choke,aps,176&sr=8-3

 

[PaulStew]

Do you have the old style harness or the new one? I found out with the Mach E this weekend that they behave differently for some reason I can't decipher yet.

The first test would actually be to just unplug your ODB2 connector and see if the errors go away. If they do, then buy these:


https://www.amazon.com/20pcs-Clip-Ferrite-Suppressor-Diameter/dp/B0CSXZWGD6/ref=sr_1_3?crid=1IGXPEU69523W&dib=eyJ2IjoiMSJ9.rdCMnR6pY0gdH79daxUhaH5CV6DSA9a8YfGH9OF8w8GXKPutH2MdAv9ypiSX_FdlvbswYJ-9JqZMdYM8a0LOx7GL434YGjn3x5n0eq32miiUvo5XQjzY-ywT7KlzvcXIXKNmALFYFO74udnNzmvPB5t_K-NZp67c12UnenkxDVq9mOxKQs3UhpekYk5-nsq5SFRbnPUumW2_FScyKyzBba-Gvvy8WqiHnAns5oRNTjI.BGglZGz26eeK1nNr3f3s_7EPmDvcSsSN1MAYFFx8bsQ&dib_tag=se&keywords=ferrite+choke&qid=1744665737&sprefix=ferrite+choke,aps,176&sr=8-3

I have the newer harness. I don't actually use the ODB2 connector, just a long usb cable.

 

[Ajzride]

I have the newer harness. I don't actually use the ODB2 connector, just a long usb cable.

Andre tried the ferrite cores on his USB cable at the very start of this thread and it didn't help. The youtube guy said putting the ferrites on the power cable helped, but if you aren't running the power cable then you can't put the ferrites there.

 

[UncleTony]

Andre tried the ferrite cores on his USB cable at the very start of this thread and it didn't help. The youtube guy said putting the ferrites on the power cable helped, but if you aren't running the power cable then you can't put the ferrites there.

I wonder if there is a large amount of EMI on the lightning due to the proximity of the front drive motor and or the high voltage runs that sit almost directly under that kick panel. I can't think of another reason of why the ICE would work fine and not the lightning.

I have seen speculation that the can bus system may differ between the two, but I can't imagine ford would completely redesign their communication system unless they were forced to. The fact that the Mach E doesn't share the issue seems to support my personal theory. (Also considering the fact that ICE owners can use generic 6 foot USB C cables without issue).

I just bought the wife a new Blazer EV so I'm not fully ready to jump into testing my theory's (as I would have to buy a unit), but man it is tempting, especially to be able to have self driving on non mapped roads.

 

[Ajzride]

I wonder if there is a large amount of EMI on the lightning due to the proximity of the front drive motor and or the high voltage runs that sit almost directly under that kick panel. I can't think of another reason of why the ICE would work fine and not the lightning.

I have seen speculation that the can bus system may differ between the two, but I can't imagine ford would completely redesign their communication system unless they were forced to. The fact that the Mach E doesn't share the issue seems to support my personal theory. (Also considering the fact that ICE owners can use generic 6 foot USB C cables without issue).

I just bought the wife a new Blazer EV so I'm not fully ready to jump into testing my theory's (as I would have to buy a unit), but man it is tempting, especially to be able to have self driving on non mapped roads.

it’s not EMF, it’s canbus reflections. We think the reason the Lightning has issues and the others don’t is that Some of the modules on the Lightning never go to sleep (and are awake during boot up on the Lightning) which is related to the reverse power (power the house) capabilities the Lightning has.


if it was EMF the resistors wouldn’t help.

 

[UncleTony]

it’s not EMF, it’s canbus reflections. We think the reason the Lightning has issues and the others don’t is that Some of the modules on the Lightning never go to sleep (and are awake during boot up on the Lightning) which is related to the reverse power (power the house) capabilities the Lightning has.


if it was EMF the resistors wouldn’t help.

I may sound ignorant by asking as I am not super familiar with canbus designs, but wouldn't that mean the issue could be fixed without the harness extension and just the resistors as it should remove the reflections? (My understanding so far is that the extension is to add the resistors and allow the use of the stock USB C cable).

If that's the case, they could just add resistors to the Q4 harness and sell it as the lightning harness.

It should also in theory not have a negative effect on other vehicles as that is considered a proper termination by canbus standards (again, just from my understanding).

 

[Ajzride]

I may sound ignorant by asking as I am not super familiar with canbus designs, but wouldn't that mean the issue could be fixed without the harness extension and just the resistors as it should remove the reflections? (My understanding so far is that the extension is to add the resistors and allow the use of the stock USB C cable).

If that's the case, they could just add resistors to the Q4 harness and sell it as the lightning harness.

It should also in theory not have a negative effect on other vehicles as that is considered a proper termination by canbus standards (again, just from my understanding).

Because the resistors have to go on the end of the canbus stub, not the beginning. I guess you could make a custom USB cable with resistors, but that seems harder than an extension.

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