Comma AI might have been causing issues on OOS truck?

[strykerwsu]

Mine has gone into limp mode twice due to comma. Just did a hard reset and good to go. Will likely need to look into the other power solution.

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[Lon12]

No issues for me. Installed comma in the spring. I have not used the additional power cable. Quad R1T serial number around 26,000.

 

[vcao]

Are you using a fuse tap or just powering it directly from the AXM?

Mine has gone into limp mode twice due to comma. Just did a hard reset and good to go. Will likely need to look into the other power solution.

 

[strykerwsu]

Are you using a fuse tap or just powering it directly from the AXM?

From Axm. Thinking about doing fuse tap if happens again.

 

[NeedSumCoffee]

I am completely shocked Rivian is even willing to work on his car. Just last week, someone was posting that Rivian wouldn’t even touch a Nirvana with suspension issues.

 

[Gurule92]

Vid


Ai synopsis
This video provides an update on a recurring motor fault issue experienced with a Generation 1 Rivian R1T (1:06). The owners, Kyle and Scot, explain that the truck would intermittently brick, displaying a motor fault notification and becoming inoperable (2:20). While a hard reset temporarily fixed the issue, it continued to reoccur at random times (2:47).

After extensive diagnosis by the Rivian service center (4:03), the suspected cause of the motor faults was identified as an aftermarket driver assistance device called Comma AI (8:30). The Comma AI system, which provides enhanced lane centering, plugs into the vehicle's driver assistance ECU (5:29).

Rivian's service report indicated that the Comma AI device was preventing the vehicle from going to sleep (8:30). However, the owners believe the truck was going to sleep, and the Comma AI might be interfering with the truck's CAN signals (9:55), causing faults when the vehicle wakes up (10:06). This theory is supported by similar, although rare, issues reported in other Rivian trucks with Comma AI installed (9:04).

To confirm the cause, the owners plan to conduct an experiment:
Driving without Comma AI: For the next month, the truck will be driven with the Comma AI unplugged (13:10).
Reinstalling with new harness: If the faults stop, they will reinstall the Comma AI with a new harness that draws 12-volt power directly from the batteries instead of the ECU (13:27).

Rivian covered the diagnostic costs as a goodwill gesture due to the truck being out of warranty and the uncertainty of the Comma AI being the direct cause (14:40). Despite the issues, the owners express their intention to continue using Comma AI due to its superior driver assistance features, provided it doesn't cause long-term damage

 

[LL75]

it's a total blame game from the sc since they don't really know what caused it.

 

[electruck]

it's a total blame game from the sc since they don't really know what caused it.

True enough but also not fair to expect them to support Comma AI or any issues associated with its installation. Most manufacturers/dealerships wouldn't even bother to look at it with such a system installed. I think Rivian went above and beyond for Kyle (probably in part because of his YouTube channel and in part out of their own interest to understand the problem).

 

[LL75]

True enough but also not fair to expect them to support Comma AI or any issues associated with its installation. Most manufacturers/dealerships wouldn't even bother to look at it with such a system installed. I think Rivian went above and beyond for Kyle (probably in part because of his YouTube channel and in part out of their own interest to understand the problem).

Absolutely. He needs to be charged for diagnostic. I'm just saying that rivian is unsure why it caused it. Remembered he said he had the comma unit since March with no issues

 

[mpshizzle]

I'm afraid Kyle's video did comma.ai a disservice here. The video title misrepresents his findings. They THINK it MAY have something to do with it, it's inconclusive, and requires further testing. Maybe comma, maybe the harness, who knows. Further testing on his part is for sure required before we can conclusively say "It Appears Comma AI Is The Cause Of My Rivian Motor Faults"

 

[narmstrong79]

This is a video Kyle just released, With being being a youtuber/influencer and pro-Rivian he got special treatment (again)



Ai Summary:
This video discusses the ongoing motor fault issues experienced by the hosts with their Generation 1 Rivian R1T Quad-Motor Launch Edition (1:06-1:10). The issue causes the truck to become inoperable and display a "motor fault detected" notification (2:27-2:33, 3:55-3:57). A hard reset (2:37-2:43) temporarily fixes the problem, but it recurs after the vehicle wakes from a sleep cycle (2:47-2:50, 7:01-7:03).

Rivian's Diagnosis: After a lengthy diagnostic period (4:08-4:13), Rivian service concluded that an aftermarket driver assistance device, specifically the Comma AI system, was preventing the vehicle from sleeping (8:30-8:36). They observed that the issue often occurs when the car wakes from a deep sleep state (7:12-7:17). Despite the truck being out of warranty, Rivian goodwilled the diagnostic service (14:40-14:44) because they couldn't prove with 100% certainty that the Comma AI was the direct cause (15:35-15:42).

The Hosts' Hypothesis: The hosts believe the Comma AI device might be interfering with the truck's CAN signals (10:06-10:09), causing a fault upon wake-up (10:11-10:14), rather than preventing the truck from sleeping (9:53-9:57). They note that the Comma AI has been installed for months without issues (8:45-8:54), and only a small number of Rivian trucks with Comma AI have experienced similar problems (11:52-12:06).

Proposed Solution and Next Steps: To confirm the cause, they plan to run the truck for a month with the Comma AI unplugged, then plug it back in with a new harness that draws 12-volt power directly from the batteries instead of the ECU (13:08-13:33). They also note that even with the Comma AI unplugged but the harness still connected, they are experiencing repeatable driver assistance failures (13:50-14:06), suggesting the harness itself might be affecting signals. Despite the issues, they express their intention to continue using the Comma AI due to its superior lane centering capabilities compared to Rivian's standard system (18:26-18:52).

 

[Gurule92]

I'm afraid Kyle's video did comma.ai a disservice here. The video title misrepresents his findings. They THINK it MAY have something to do with it, it's inconclusive, and requires further testing. Maybe comma, maybe the harness, who knows. Further testing on his part is for sure required before we can conclusively say "It Appears Comma AI Is The Cause Of My Rivian Motor Faults"

I think we have to consider the nature of YouTube here. They need a title that's going to get engagement but also need to be fair to comma. Saying it "appears" to have caused it, to me, is fair, because that's what rivian said. He didn't say it definitely caused it.

And if people watch the vid they'll hear the plan to test.

 

[mpshizzle]

I feel that Kyle's video did comma.ai a huge disservice here. The video title "It Appears Comma AI Is The Cause Of My Rivian Motor Faults" implies a conclusive result that comma is causing problems. However the reality is that it's all just speculation at this point. They don't REALLY know if it's the comma, the wiring harness, or none of the above. They need to do further testing before they can trulyo say "IComma AI Is The Cause Of My Rivian Motor Faults".

 

[Gurule92]

https://www.rivianforums.com/forum/...causing-issues-on-oos-truck.49865/post-862846

 

[narmstrong79]

https://www.rivianforums.com/forum/...causing-issues-on-oos-truck.49865/post-862846

Thanks the admins can consolidate these

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