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.
They’ve also been expanding the capabilities of Service Mode lately, including Service History staying on-vehicle, improvements to the brakes panel and the addition of speaker testing, and now, a Wiring Diagram for the Cybertruck.
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 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.
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.
