Order of Alerts 2022 M3LR

[Theron]

I've got a question about the order of the alerts. Are the alerts at the top of the page the most recent? I'm trying to troubleshoot why after replacing my pyro fuse, service mode still shows the fuse as being bad- I've replaced it with 2 now with the same result.

The alerts also show the Shunt is MIA- so I'm thinking that possibly the Shunt was damaged when the pyro fuse blew. The Shunt MIA Alert seems to be the first to show up on the bottom of the alerts list - see attached img

 

[Pavel Shevchuk]

Hello, how did you solve your problem? what changed the parts?

 

[Theron]

I posted here to try to get some help solving my problem- you are the only one to respond.

 

[Pavel Shevchuk]

I have a similar problem, I replaced the pyro, shunt, restored the 16v battery, but this did not help, I would like to know where to look next

 

[Pavel Shevchuk]

maybe you have some bms errors?

 

[Theron]

Can you post a screenshot of your alert errors?

And what year and model of Tesla do you have?

Also, were you able to bring the 16v battery back on line? Even though mine is charged and voltage is good- running the routing to bring it back online fails. you?

 

[Pavel Shevchuk]

here are the errors
I also cannot reconnect the 16V battery, although the mosfet in it is closed

 

[Theron]

I assume yours is a M3- what year?

It looks like we have the exact same problem- same Alerts. I ordered a new Shunt (it's in the mail) and was hoping that will fix it- but you said you replaced yours already. The shunts are different for the 2021-2023 models. I found some commentary regarding Alert a_179 that I will share with you after I find it again.

 

[Pavel Shevchuk]

yes, waiting for information
as far as I know, the shunts should be the same, or maybe you have a number to compare?

 

[Theron]

Hey Pavel- I think I may have found the solution for us. "According to this Tesla guy, the version with the regular 12V battery only required the pyrofuse to be replaced after airbags and seatbelts. On the new system, the VCfront must be replaced as well."

Note: after replacement of vcfront module you do need to jump the car and redeploy the current software that will fix all the alert you have you showed in the post. you do not need toolbox for this procedure.

-If you have coolant issues, you have to fix them first. Otherwise, the pumps won't be able to purge and won't close the contactors
-All modules have to be connected, SRS or RCM, it doesn't matter if you have airbag issues, but the module has to be connected
-for some reason, if there is one of the main head/tail lights that might not be connected, that most likely will stop the software update
-While pushing the software update, you will need to have external support of 13V with 30 AMP and run the software update

 

[Pavel Shevchuk]

hmm interesting, I just did a vcfront reset, and what's the point of vcfront if we don't have a connection with pyro and shunt?

 

[Theron]

yes, waiting for information
as far as I know, the shunts should be the same, or maybe you have a number to compare?

2021-2023 TESLA MODEL S/X SHUNT ASSEMBLY HIGH VOLTAGE BATTERY 1588177-00-B OEM
This is the one I ordered- is this the same one you have?

 

[Theron]

Here's another person's story:
They had the following alerts:

BMS_a179

BMS_a128

VCFRONT_a478

VCFRONT_a402

VCFRONT_a192

VCFRONT_a191

[I think you and I are beyond their VCFront Alerts because we were able to do a VCFront reset via Toolbox (that's what I did)]
However, there is apparently an e-fuse inside the VCFront module that gets open after an accident -so this might be our problem

They cleared all these alerts and got contactors to close after replacing VCFront module--

Pavel, would you have a VCFront module to swap from another car 2021-2023 to try to see if it fixes our problem?

 

[Theron]

Here's another person's story:
They had the following alerts:

BMS_a179

BMS_a128

VCFRONT_a478

VCFRONT_a402

VCFRONT_a192

VCFRONT_a191

[I think you and I are beyond their VCFront Alerts because we were able to do a VCFront reset via Toolbox (that's what I did)]
However, there is apparently an e-fuse inside the VCFront module that gets open after an accident -so this might be our problem

They cleared all these alerts and got contactors to close after replacing VCFront module--

Pavel, would you have a VCFront module to swap from another car 2021-2023 to try to see if it fixes our problem?

Also it sounds like we will need to do a 'factory reset' at some point in fixing our issues- which requires car to be registered to you in the Tesla app for permissions. When I try to run the routine I'm prompted for my Tesla account ID and password.

 

[Ther0ck]

I've got a question about the order of the alerts. Are the alerts at the top of the page the most recent? I'm trying to troubleshoot why after replacing my pyro fuse, service mode still shows the fuse as being bad- I've replaced it with 2 now with the same result.

The alerts also show the Shunt is MIA- so I'm thinking that possibly the Shunt was damaged when the pyro fuse blew. The Shunt MIA Alert seems to be the first to show up on the bottom of the alerts list - see attached img

View attachment 979854

Usually the 1st alert at the top is the more recent.

 

[Pavel Shevchuk]

You can charge you car?

 

[Theron]

I"m wondering if there is a e-fuse flag state that can be checked/reset in Toolbox//Toolbox Terminal for the VCFront/other components?