RexRemus
Well-Known Member
- First Name
- Chuck
- Joined
- Sep 27, 2021
- Threads
- 42
- Messages
- 759
- Reaction score
- 1,345
- Location
- Chicago, IL
- Vehicles
- 2023 R1S
- Thread starter
- #1
First let me clarify - by aggressive I don't mean slamming on the brakes, I just mean noticeably more "aggressive" or perhaps "eager" than normal for WHEN they are applied.
After the update that added extra braking assist for when regen is limited, I have noticed at least 2-3 times where my R1S will apply friction braking well before my foot is off the pedal and lurch to a stop. It's always already at low speed (2-3mph) but it STOPS. There's no "coast" like you typically get with a full lift-off - at least maybe I should quantify that that is my personal one-pedal experience - when coming to a stop, it's a gradual lift-off, and then at the end my foot is fully off the pedal, there is a very small "coast" to a stop and then friction brakes grab as the vehicle shifts into H(old). That's how it's always worked and it achieves very gentle, smooth, stops.
But there have now been a few times, one just yesterday, that the friction brakes are actively engaging to stop the vehicle before my foot is off the pedal, I can't really look, but I'd wager somewhere around 1-1.5" depressed still which is typically enough to "creep" the vehicle. It just STOPS. I also notice that it feels like the brakes do not release as quickly as they should either, like there's a lurch when starting as if the brakes are holding during that same 1-1.5" of pedal travel and then suddenly release, you can hear and feel it.
I know there was something about some accelerator pedals being defective/faulty and that they tried to do something in software to fix that (around too much coasting before hold?) and I wonder if I have a bad pedal and when it "acts up" this is how the software is dealing with it. Can anyone else confirm if they have had this behavior, or does anyone know how to verify if you have VIN that might have a defective pedal? I'd be willing to pay service to replace it if this is how the software fix works. It's really jarring when it kicks in, and it just stops unexpectedly - Rivians seem to get rear-ended MORE than enough WITHOUT any unexpected braking, I don't want to increase my odds for it, or for tapping someone else when I THINK it's going to stop, and suddenly decides to coast an extra 5 ft.
Is this happening to anyone else?
After the update that added extra braking assist for when regen is limited, I have noticed at least 2-3 times where my R1S will apply friction braking well before my foot is off the pedal and lurch to a stop. It's always already at low speed (2-3mph) but it STOPS. There's no "coast" like you typically get with a full lift-off - at least maybe I should quantify that that is my personal one-pedal experience - when coming to a stop, it's a gradual lift-off, and then at the end my foot is fully off the pedal, there is a very small "coast" to a stop and then friction brakes grab as the vehicle shifts into H(old). That's how it's always worked and it achieves very gentle, smooth, stops.
But there have now been a few times, one just yesterday, that the friction brakes are actively engaging to stop the vehicle before my foot is off the pedal, I can't really look, but I'd wager somewhere around 1-1.5" depressed still which is typically enough to "creep" the vehicle. It just STOPS. I also notice that it feels like the brakes do not release as quickly as they should either, like there's a lurch when starting as if the brakes are holding during that same 1-1.5" of pedal travel and then suddenly release, you can hear and feel it.
I know there was something about some accelerator pedals being defective/faulty and that they tried to do something in software to fix that (around too much coasting before hold?) and I wonder if I have a bad pedal and when it "acts up" this is how the software is dealing with it. Can anyone else confirm if they have had this behavior, or does anyone know how to verify if you have VIN that might have a defective pedal? I'd be willing to pay service to replace it if this is how the software fix works. It's really jarring when it kicks in, and it just stops unexpectedly - Rivians seem to get rear-ended MORE than enough WITHOUT any unexpected braking, I don't want to increase my odds for it, or for tapping someone else when I THINK it's going to stop, and suddenly decides to coast an extra 5 ft.
Is this happening to anyone else?
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