Sponsored

R1T 12v batteries dead

SANZC02

Well-Known Member
First Name
Bob
Joined
Feb 11, 2021
Threads
29
Messages
5,260
Reaction score
8,863
Location
California
Vehicles
Tesla Model S, LE - R1S
Occupation
Retired
It's a pretty nice Schumacher charger and like I said I did use the charger briefly at 30amps to see what would happen. Everything turned on instantly...screens, headlights, charge door operable. Also note that I did try to measure the voltage from the jump wires in the hitch and it couldn't measure anything. Such a weird thing going on with these batteries....GOTTA be a software thing. But it's way out of my depth.
Curious, did you try hooking the 30 amp charger to the jump leads? If so did anything happen? As for not getting a reading from them, there may be a relay that will not open with such low battery voltage.
Sponsored

 

Kuro-Rivian

Well-Known Member
Joined
Apr 26, 2022
Threads
18
Messages
399
Reaction score
682
Location
Minneapolis
Vehicles
1969 BMW 2002
Curious, did you try hooking the 30 amp charger to the jump leads? If so did anything happen? As for not getting a reading from them, there may be a relay that will not open with such low battery voltage.
I didn't try but I bet you're right...there must be a relay in there somewhere. Probably closes when you apply a high enough charge.
 

Tucker74

Well-Known Member
First Name
Tucker
Joined
Sep 20, 2022
Threads
12
Messages
257
Reaction score
294
Location
Austin, TX
Vehicles
2023 R1T
Occupation
Engineer
Also note that I did try to measure the voltage from the jump wires in the hitch and it couldn't measure anything. Such a weird thing going on with these batteries....GOTTA be a software thing. But it's way out of my depth.
Read the jumper circuit has a relay to isolate power back to the lugs to prevent a short. It will only flow to the 12V batteries when energized-
 

Kuro-Rivian

Well-Known Member
Joined
Apr 26, 2022
Threads
18
Messages
399
Reaction score
682
Location
Minneapolis
Vehicles
1969 BMW 2002
Read the jumper circuit has a relay to isolate power back to the lugs to prevent a short. It will only flow to the 12V batteries when energized-
Yeah, makes sense. Kinda wild, the jumper cables are just two wires with a cheap ring terminal covered in gaffers tape... it's sooo low grade. I could easily see an accidental short with those things flopping around back there if there wasn't some type of protection like that.

I'm tempted to try to jump it back there to test that theory but just gonna leave it alone.
 

zefram47

Well-Known Member
First Name
Aaron
Joined
Feb 6, 2022
Threads
13
Messages
2,019
Reaction score
3,159
Location
Denver, CO
Vehicles
R1T, C6 Corvette GS
Occupation
Software Engineer
Clubs
 
Didn't someone say that the jumper wires only went to one of the two batteries and the two weren't connected?
 

Sponsored

suprteck

Well-Known Member
First Name
Anthony
Joined
Dec 20, 2022
Threads
6
Messages
112
Reaction score
73
Location
California
Vehicles
Tesla Model 3, Rivian R1T
Occupation
Mechanic
Yeah, makes sense. Kinda wild, the jumper cables are just two wires with a cheap ring terminal covered in gaffers tape... it's sooo low grade. I could easily see an accidental short with those things flopping around back there if there wasn't some type of protection like that.

I'm tempted to try to jump it back there to test that theory but just gonna leave it alone.
I just tried to get a voltage reading at the jump terminals but not getting any voltage reading so they are isolated...
 

SANZC02

Well-Known Member
First Name
Bob
Joined
Feb 11, 2021
Threads
29
Messages
5,260
Reaction score
8,863
Location
California
Vehicles
Tesla Model S, LE - R1S
Occupation
Retired
On another web site they heard from Rivian who has been working on the issue and hope to have a software fix for it in a week or so.
 

SANZC02

Well-Known Member
First Name
Bob
Joined
Feb 11, 2021
Threads
29
Messages
5,260
Reaction score
8,863
Location
California
Vehicles
Tesla Model S, LE - R1S
Occupation
Retired

bael

Well-Known Member
Joined
Nov 24, 2021
Threads
27
Messages
437
Reaction score
740
Location
GA
Vehicles
LE R1T, X5
Clubs
 
Cool! Care to share where you saw that?
Here has the next software release notes as well saying that there is a 12v fix. Hopefully that will be rolling out to us all by the weekend unless they find a bug in it
 

Sponsored

Brewbud

Well-Known Member
Joined
Jun 18, 2019
Threads
5
Messages
465
Reaction score
395
Location
SoCal
Vehicles
R1T, 20 Cummins, 05 Jeep LJR, 22 Range Rover Sport
I saw a post about an upcoming software fix. The 12V issue was listed as extremely rare and was the last thing on the list.

New TuneIn Premium Trial
An excluse TuneIn Premium trial for 365 days is now available for Rivian customers. With TuneIn Premium you have access to:

  • Every MLB and NHL game. Live. No blackouts.
  • Nonstop news coverage. Commercial free.
  • Less ads on 100,000 radio stations.
Note: You may lose access to TuneIn Premium channels unless you activate the free trial or have a Premium account.

Tesla Supercharger Network Now Available In Navigation Charger Filters

Your vehicle now shows select Tesla Supercharger locations with a Magic Dock in the Navigation app’s charger filters. A Magic Dock allows you to charge your Rivian at select Tesla Supercharger locations. These locations also show in the Rivian mobile app version 1.12 or later. To charge at a Tesla Supercharger, you need to download the Tesla app.

Plug and Charge
This release enables vehicle Plug and Charge functionality when charging on the Rivian Adventure Network and Waypoint Chargers, in order to provide a seamless experience.

Note: This feature will be introduced on the Rivian Adventure Network and Waypoint Chargers on a rolling basis.

New Third Row Fan Control (R1S ONLY)

The second- and third-row seats now have separate controls for your convenince. For access, choose the temperature with the Fan icon on the center display. Then choose Middle to access the second-row climate controls, or choose Back to access the third-row fan controls.

Additional Improvements
  • Highway Assist has been improved to reduce the frequency of hands-on warnings when Highway Assist is active in stop-and-go traffic scenarios. You still must remain attentive and should be prepared to take control of the vehicle at any time while Highway Assist is engaged. For more information, please see the Owner’s Guide.
  • You can now open and close your liftgate with the mobile app version 1.12 and later (R1S ONLY)
  • You can now open your tailgate with the mobile app version 1.12 and later (R1T ONLY)
  • Improved range loss when a phone key is near the vehicle for long periods of time.
  • Improved phone key and key fob proximity unlocking consistency.
  • You can now toggle exterior lock sound on and off. Choose Settings > Vehicle > Access > Lock Sound (exterior).
  • Added a text label to state your key fob’s battery level inside of Settings > Drivers and Keys. The indicator text will appear when the battery level is medium or low only.
  • Hotspot Improvements
    • You can now choose the Hotspot button in the status bar to toggle the hotspot on or off and open hotspot settings.
    • Fixed an issue where quickly toggling the hotspot on and off indefinitely disabled it until you restarted the vehicle.
  • Media Fixes and Improvements
    • You can scroll through your Favorites with the left thumb control on the steering wheel.
    • Fixed a rare issue where TIDAL crashed when trying to perform a text search.
    • Fixed an occasional issue where the Bluetooth media player showed the incorrect play/pause state.
    • Fixed an occasional issue where the radio wouldn’t resume playing after returning to your vehicle within five minutes.
  • After you remove the charging cable, the charge port door no longer automatically closes after 30 seconds. The charge port door closes automatically when you drive the vehicle. You can also manually close it from the center display or using the sensor on the charge port door.
  • Fixed an issue where an erroneous notification was shown when attempting to use Adaptive Cruise Control while stability control was disabled in vehicle settings.
  • Fixed a rare issue that caused inconsistent lane centering when Highway Assist was active.
  • Fixed an occasional issue where you would see an unrelated notification when switching between day and night mode.
  • Fixed a very rare issue that caused an internal loss of communication when turning on a vehicle, which drained the 12 V batteries.
 

SANZC02

Well-Known Member
First Name
Bob
Joined
Feb 11, 2021
Threads
29
Messages
5,260
Reaction score
8,863
Location
California
Vehicles
Tesla Model S, LE - R1S
Occupation
Retired
New Third Row Fan Control (R1S ONLY)
The second- and third-row seats now have separate controls for your convenince. For access, choose the temperature with the Fan icon on the center display. Then choose Middle to access the second-row climate controls, or choose Back to access the third-row fan controls.
.
Nice, I hope this means we can turn on third row vents without a seatbelt being plugged in. Will make it much easier when bringing the pups.
 

shrink

Well-Known Member
Joined
Feb 16, 2021
Threads
67
Messages
1,050
Reaction score
1,868
Location
Phoenix, AZ and Kailua-Kona, HI
Vehicles
'23 R1S (x2); '22 R1T; '14 Jeep Cherokee
Clubs
 
When I do take delivery, I'm getting these first day. I also confirmed with the sales rep that the Rivian batteries have bluetooth integration so you can view battery status etc through their app. That alone makes it worthwhile from a peace of mind standpoint. One cool thing is that you could technically top up the batteries if they aren't charging using Rivian's onboard power and a trickle charger.

https://www.ohmmu.com/product-page/12v-lithium-battery-2-pack-for-rivian-r1t-r1s
I’d wait for more testing and user reports before dropping that in your Rivian. Some Tesla owners have had some issues.

https://www.teslaownersonline.com/threads/the-12v-ohmmu-issue-with-2021-44-30-update.20184/

https://teslamotorsclub.com/tmc/threads/ohmmu-12v-battery-feedback.189962/page-5
 

Brewbud

Well-Known Member
Joined
Jun 18, 2019
Threads
5
Messages
465
Reaction score
395
Location
SoCal
Vehicles
R1T, 20 Cummins, 05 Jeep LJR, 22 Range Rover Sport
You are correct. The problem is not the batteries but the inability for the truck to charge them.
Yes, but the replacement LiFePO4 batteries shouldn't stay dead after being charged.
Sponsored

 
Last edited:
 




Top