Sponsored

How could Rivian do this to me? (Lost rear drivetrain power)

LivingInKaos

Well-Known Member
Joined
Jun 30, 2022
Threads
19
Messages
1,011
Reaction score
1,989
Location
Oregon
Vehicles
R1T Launch Green Forest Edge
Occupation
Own Fabrication Company / VP of Portland Rivian Club
Clubs
 
The disconnect acts as a safety so that if you have an issue it can release to save from potential/further damage. The Gen 1's have been having many erroneous CAN bus errors the past few months bringing up anything from acc unavailable to motor faults. Sadly I fear that this is going to get worse not better given the now lessened support for Gen 1.
Sponsored

 

Riviot

Well-Known Member
Joined
Mar 29, 2021
Threads
122
Messages
6,463
Reaction score
10,917
Location
Kitsap, WA
Vehicles
R1T
Clubs
 
The disconnect acts as a safety so that if you have an issue it can release to save from potential/further damage. The Gen 1's have been having many erroneous CAN bus errors the past few months bringing up anything from acc unavailable to motor faults. Sadly I fear that this is going to get worse not better given the now lessened support for Gen 1.
Thanks for the morning rabbit hole, I've come back up for air with some questions 🐰

Rivian R1T R1S How could Rivian do this to me? (Lost rear drivetrain power) 1000006183


Rivian R1T R1S How could Rivian do this to me? (Lost rear drivetrain power) 1000006184


Rivian R1T R1S How could Rivian do this to me? (Lost rear drivetrain power) 1000006185


Would this be under the Vehicle Dynamics CAN in the CGM?

The BCM LIN diagram is barely clear enough to read, but the full vehicle network architecture diagram is (probably intentionally) terribly blurry. My attempts at ChatGPT cleanup resulted in nil.

Fun find on the BCM LIN: Winch Control Module
Rivian R1T R1S How could Rivian do this to me? (Lost rear drivetrain power) 1000006187
 

Attachments

nothinglimited

Active Member
Joined
Feb 26, 2021
Threads
0
Messages
35
Reaction score
22
Location
Lake Tahoe
Vehicles
2025 R1S Dual Performance Max
Recently I had a similar experience with the rear drive unit on a Gen 2 R1S Dual Perf Max. After reset, it seemed OK at first, then after half mile test as I was decelerating to a stop sign, I felt and heard a bang from the rear with the return of the turtle, so needed to resort to Roadside for tow to service center. Received a new rear drive unit replacement under warranty and it seems to perform better than before-- smoother acceleration from standstill, and quicker up the speed ramp. Methinks something was wrong since delivery, but previous service visits found nothing out of spec. I recommend a service center visit wholeheartedly, despite the differences in generation/model.
 

zefram47

Well-Known Member
First Name
Aaron
Joined
Feb 6, 2022
Threads
18
Messages
2,768
Reaction score
4,560
Location
Denver, CO
Vehicles
Rivian R1T, Alfa Romeo 4C
Occupation
Software Engineer

RivianRiverRat

Well-Known Member
First Name
Greg
Joined
Mar 9, 2022
Threads
12
Messages
666
Reaction score
874
Location
Chattanooga TN
Vehicles
2022 Rivian R1T
Occupation
Civil Engineer

Sponsored

scooby

Member
First Name
William
Joined
Apr 28, 2022
Threads
0
Messages
14
Reaction score
27
Location
Northern California
Vehicles
R1T, F250, Just sold Plaid
Occupation
Finance
Thanks for the morning rabbit hole, I've come back up for air with some questions 🐰

1000006183.webp


1000006184.webp


1000006185.webp


Would this be under the Vehicle Dynamics CAN in the CGM?

The BCM LIN diagram is barely clear enough to read, but the full vehicle network architecture diagram is (probably intentionally) terribly blurry. My attempts at ChatGPT cleanup resulted in nil.

Fun find on the BCM LIN: Winch Control Module
1000006187.webp
I was speaking with my Mobile Rivian tech just this morning. He confirmed the R1 has a 300 Amp dedicated fuse for the winch. I asked if it is fed directly from the DC battery to 12 volts- he indicated yes. I will follow up with him tomorrow to confirm details and location.
 

DKM_R1S

Well-Known Member
First Name
Dan
Joined
Apr 2, 2024
Threads
46
Messages
333
Reaction score
220
Location
West Chicago Suburbs
Vehicles
R1S
Occupation
Manufacturing
Clubs
 
I had the same thing happen at 3K miles on our R1S Quad Gen 1. Rear right drive unit disconnect failure. keep it in conserve mode if you can
Sponsored

 
 








Top