Tesla’s vehicles all have a built in Service Mode, where you can find working diagrams of anything from the HVAC system, low or high voltage systems, your power steering, or infotainment. All of this is included on-vehicle, and doesn’t require a third-party tool or subscription.
Of course, if you need more information, Tesla does offer Toolbox3, a fairly inexpensive subscription package that can be downloaded onto any laptop and connected to any Tesla - without the hassle of needing a special manufacturer-specific OBD tool.
Thanks to John Kelly for finding this. Let’s dig into it.
48V LVCS Connector Reference
Cybertruck runs on a 48V architecture, called LVCS, or Low-Voltage Connector Standard. They recently launched this standard to the rest of the automotive industry, in hopes of promoting standardization and progress.
48V and LVCS offer Tesla the unprecedented ability to optimize the wiring inside Cybertruck and future vehicles, massively reducing the complexity and cost - and also ensuring that everything within the vehicle is networked. That networking means that you can also debug the Cybertruck’s wiring from within the vehicle - without needing to disassemble the entire thing.
The wiring diagram, set to the front cabin view.
John Kelly on X
The Wiring Service Diagram offers the ability to search for particular connectors, and also see where the wiring runs originate and terminate. And that’s not all - you’re also able to pull up the pinouts, wire colors, and harness connections to see everywhere that specific connector brings data, power, or anything else to.
The pinout view for a particular connector.
John Kelly on X
This is an fantastic update, and enables anyone, including a DIY home mechanic, to be able to figure out exactly what might be wrong with a particular system, as well as how to potentially correct it. In addition, all of this data is freely available within the vehicle, and nothing else is required to be able to access it other than sitting down and entering Service Mode Plus.
How to Access It
For this particular interface, you’ll need to access Tesla’s Service Mode Plus, which means you’ll need a subscription to Toolbox 3, Tesla’s Service Software. We won’t walk you through that procedure here, as we recommend you review Tesla’s Service Manuals before jumping in.
Assuming you know what you’re doing, once TB3 is setup and connected to the vehicle, you can enter Service Mode Plus from the TB3 primary menu, and then navigate your way to the Low Voltage section. The Connector Reference Tool is its own sub-heading, and the search tool to look for particular connectors is in the top right.
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Tesla’s refreshed Model Y is currently being manufactured as Tesla prepares for its first deliveries next month. While we’ve already seen quite a few cool new features, there’s more that has yet to be revealed. A recent video interview with Tesla’s engineering team hosted by Tesla Owners Silicon Valley reveals that the vehicle includes a new 4D cabin radar.
4D Radar
While Tesla has included an in-cabin radar since 2022, this appears to be a new, more capable radar. The current cabin radar is used to verify seat occupancy, but Tesla plans to add more functionality to this new system.
This updated radar will be used to provide a lot more detail than the current radar or cabin camera can provide today. The radar is located in the same location as the current version, directly above the rearview mirror.
Classify Passenger Size
This new radar has several new safety-focused features, and they’re all quite exceptional. First off, the radar will detect and classify passenger size to determine which airbags to deploy dynamically. That means that if a shorter individual is sitting up front, the dashboard airbag may not activate - but the curtain airbag will.
That will reduce injuries in impacts from airbag activation while also reducing repair costs by not activating unnecessary airbags. By having a better idea of the passenger’s size, height, and weight, the vehicle can also better determine when to activate the airbag.
Children Left in Car
But that’s not all - because of that classification system, the radar can differentiate an adult passenger from a baby or child sitting in the second row - and automatically make the necessary dynamic safety adjustments.
The cabin radar will also detect heart rate and breathing, and Tesla will automatically send a reminder through the Tesla app if it detects a child is left unattended in the vehicle. If this occurs, the vehicle will perform a variety of functions, the first being to turn on the HVAC system and send you a reminder. And if that’s not enough - in the case of an emergency, your vehicle will automatically call emergency services for you and report its location.
It’s important to note that while vehicles outside North America have eCall capabilities, in North America, they cannot call 911 unless a phone is connected to the vehicle via Bluetooth. We hope that Tesla can contact 911 via an alternative method or add eCall capabilities to these vehicles.
While the refreshed Model Y will be shipping in March, this new radar and its associated features won’t be available immediately. Tesla intends to activate these new safety features in Q3 2025 - so sometime in late summer or early fall. We’ll dive into this new feature once it’s available later this year.
A member of Tesla’s AI development team, Kalena Brown, took to X to mention that an update is on its way for AI 4 vehicles on older FSD V13.2 builds.
It seems that Tesla has caught an issue that has been preventing vehicles from safely updating from FSD V13.2.2 to newer builds such as FSD V13.2.4 or V13.2.6.
The Bug
Tesla usually catches these issues early in testing, but sometimes, they make their way out into the wild, necessitating a stop to a rollout. In this case, the rollout was likely halted to prevent this issue from spreading to other vehicles.
There have been a lot of comments on social media that users haven’t seen an update since late December or early January. While that’s not completely abnormal, this update, version 2024.45.25.5 includes an issue that prevents it from being updated.
Please be patient! Found an issue specific to that update path, but fix is coming soon
Many folks on older builds also waiting and we're working hard to get everyone covered 🙂
Brown says that Tesla is aware of the issue and is working hard to get a build with the fix released soon. It may be a couple of weeks before it’s ready, but you can expect Tesla to roll this one out slowly to make sure the issue is addressed.
The issue appears to be specific to FSD V13.2.2, so anyone on another update should not be affected. Keep an eye out on our feeds - and we’ll let you know once the update is released.
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