Tesla Service Mode: How to Access It and What It Does

June 1, 2024

By Karan Singh

Tesla's Service Mode

Not a Tesla App

Tesla ships a very detailed and comprehensive diagnostic and repair utility that is available in-vehicle, without requiring external plugs, adapters, or computers. It helps both Tesla and 3^rd party technicians service Tesla vehicles far more efficiently.

Who Can Access It?

Unlike many other vehicle manufacturers, who require OBD-2 ports, service subscriptions, and other external utilities, anyone can access Tesla’s service mode. All owners and 3^rd party technicians can access Service Mode by simply entering a special mode in the vehicle.

What Features Does It Have?

Service Mode is a special hidden app in the vehicle that provides various diagnostics tools that let you test various vehicle subsystems and components. Remember that if you’re exploring service mode on your own, you’ll want to be careful. Many of the features kept inside Service Mode are intended for debugging or repair – and not for the average user, however, Tesla provides a very user-friendly interface.

The options available will vary based on the vehicle and the systems available in that vehicle. For example, the Model S will have a diagnostic tool to troubleshoot its door handles, while the Model X will have one for its falcon-wing doors, but most tools will apply to a wide range of vehicles.

The Vehicle Info section of Service Mode

Not a Tesla App

How to Access Service Mode

Tesla’s Service Mode is accessible via the touchscreen with just a few taps. Go to the vehicle controls button (the car icon), and tap the Software tab. After that, locate the vehicle model badge, (e.g. MODEL Y Long Range), directly beneath the vehicle image.

Tap and hold the word “MODEL” for 2 seconds, until you see a small ripple then let go. A menu and on-screen keyboard will pop up, prompting for an access code. Type the access code “service”.

Once you do this, it will bring up the SERVICE menu and a new app in the dock that’s red with a wrench. The entire display will also have a red border around it, indicating the vehicle is in Service Mode. Do NOT drive the vehicle in Service Mode, as many safety features are disabled while Service Mode is active.

How to Exit Service Mode

Once again, you can disable Service Mode from the primary display. If you’ve gone into another app, locate a bright red icon with a wrench in the dock or in the All Apps menu.

Once you bring up the Service Mode app, tap on the last icon in the left column. It’s red and shows a door with an arrow. Simply tap and hold this icon for several seconds to exit Service Mode. You’ll know once Service Mode is exited because the red border around the screen will be removed.

If you can’t find the Service Mode app, start Service Mode again by going to Controls > Software and holding the badge icon to enter Service Mode mode again. Once you’re back in the menu, tap and hold on the red exit icon.

Vehicle Info

Tesla breaks Service Mode into various sections which we’ll go through below. The Vehicle Info section provides most of the same information available in the vehicle’s Software menu, showing you things such as VIN, Autopilot computer, software version and more. At the bottom, you also have access to Service Alerts, Service Settings, Software Reinstall, and a Touch Screen check to confirm your display is working correctly. There is also a button for Additional Resources, which takes you to your vehicle’s Service Guide online.

Driver Assist

This tab has two menus – Cameras and ECU. The Cameras menu provides nominal information on the vehicle cameras, including pitch information – useful for technicians working on the windshield. You can also clear camera calibration from here – but you can also do that within the regular vehicle menus and get a full preview of all cameras.

The ECU tab provides information on the vehicle's electronic control unit and GPS/GNSS.

Infotainment

Infotainment section of Service Mode

Not a Tesla App

The Infotainment tab has two menus – Connectivity and Software. The Connectivity menu provides information on Wi-Fi and Cell connectivity and the status of the vehicle’s modems. You can run tests on either modem from here.

The Software tab provides information on the vehicle’s downloaded software and backup banks. Here, you’ll see that both the infotainment and Autopilot systems have 2 side-by-side banks – one keeps the previous update. Map info is also available here. These will be blank or display “—” while updating.

High Voltage

High Voltage section of Service Mode

Not a Tesla App

The High Voltage section is one of the most useful menus – it provides you with the ability to conduct Battery Health tests. The UI here provides information on the entire high-voltage system, including the battery, inverter, motors, vehicle charger, as well as the contactor and high-voltage pyro fuse.

The second tab in the high voltage menu displays the temperature of the battery and details on connected charging apparatuses.

Low Voltage

The Low Voltage system is all the other electronics in the car, and it provides information on the various low voltage components, including the 16v Lithium-Ion (or 12v Lead-Acid, for older vehicles).

This UI is drastically different in the Cybertruck – where it does not run on 16v, but rather 48v.

The last piece of the Low Voltage UI is Homelink. If you purchase Homelink – an add-on module – Tesla will install it for you. If you choose to install it yourself, you can commission the Homelink module through this menu. In the menu, you can also see how many devices are programmed and how many codes have been transmitted with HomeLink.

Thermal

The Thermal menu displays the status of the HVAC system, as well as the battery’s portion of the loop. It’s one of the coolest-looking menus since its animated.

It provides options for self-tests, as well as several options for the coolant and thermal pumps. This UI is for vehicles with heat pumps – legacy vehicles will have an A/C compressor and resistive heating.

This is also where you can view the status of your cabin and HEPA filters, and you can see if they need to be replaced.

The Thermal Menu on 2024.14

Not a Tesla App

Chassis

The Chassis menu provides you with steering options – and the ability to view or adjust your steering wheel offsets, look at suspension information on the Model S and X, re-calibrate the steering column, and confirm each of the buttons on the steering wheel and its stalks are working as expected.

It also provides you with some details on the vehicle’s brakes – showing some test and brake bleed options. An option for Brake Burnishing option is also available here.

Closures

The closures menu shows the status of windows, or automatic doors as well as the status of the front and rear defrosters. You can recalibrate each window and confirm it’s working properly. On the Model S it displays information on the automatic door handles, on the Model X it has a test for the gull-wing doors and for the Cybertruck you can test the tonneau cover.

Safety & Restraints

Safety & Restraints section of Service Mode

Not a Tesla App

This menu simply displays the status of airbags, seat restraints, occupancy sensors and the pyro fuses in them, letting you confirm that each item is working properly and doesn’t have any faults.

Service Mode+ and Toolbox3

Of course, Tesla does have their own way of getting even more data than what is provided in Service Mode, through Service Mode+ and Toolbox3 – a subscription-access service similar to other vehicle vendors.

Service Mode+ is an additional set of tools that are internal to Tesla and require a Toolbox3 setup and subscription to access. It provides further information to fleet owners, collision centers, and Tesla technicians to diagnose and repair vehicles, as well as providing the capability to easily enable or disable Service Mode on vehicles remotely.

Toolbox3 is a subscription service that Tesla offers 3^rd-party technicians and collision centers for around $3,000 per year or a hefty $500 for 30 days. Toolbox3 is installed on a computer and uses a special vehicle interface cable connected to the vehicle. If you’re a technician looking for details on how to set up or use Toolbox3, Tesla’s Online Service Manuals provide a per-vehicle and per-hardware spec guide on how to set it up.

Tesla’s NACS Charging Standard Receives MotorTrend Best Tech Award

February 27, 2025

By Karan Singh

Not a Tesla App

MotorTrend is running their suite of Best Tech of 2025 - and the winner that took home the Best Tech for Public Charging System is none other than Tesla’s North American Charging Standard - better known as NACS or the Tesla Plug.

What is NACS?

NACS is Tesla’s home-grown connector standard - and is now the standard in North America. Tesla opened the connector standard back in November 2022, inviting other automakers to collaborate on a better and easier-to-use charging standard.

At that time, CCS was rapidly gaining traction as the industry standard, but Teslas remained the most common EV on the road. This put Tesla in a unique position to establish a new standard in North America, where the Tesla connector was the most popular.

SAE Standard

After Tesla opened up its connector, the Society of Automotive Engineers (SAE) swiftly adopted it, naming it the J3400 EV Coupler. The SAE initiated the process in June 2023, with the validation phase concluding in October, alongside the release of the J3400 Recommended Practices document, officially establishing NACS as the industry standard in North America.

While a few holdouts, such as Volkswagen and Stellantis, initially hesitated to embrace NACS, they soon came on board. Today, no major automaker selling vehicles in North America plans to use CCS for their future EVs.

Why is NACS Better?

NACS is an innovative charging standard that outperforms both CCS1 and CCS2 (the EU’s version) in almost every way. The system is lighter, more user-friendly, and more versatile, offering better thermal efficiency than comparable CCS systems. Additionally, the handle and plug are designed to be more ergonomic and streamlined, making them easier to use and far less cumbersome.

Differences Between CCS1 and CCS2

The CCS1 charging standard in North America combines the J1772 connector for AC charging with separate pins for DC fast charging. However, it differs drastically from CCS2, which is used in Europe. CCS2 features a more compact design and allows digital communication for both AC and DC charging. It also supports higher power than CCS1.

Technically Better

NACS was designed out of necessity back in 2012 when there wasn’t a connector that met Tesla’s needs for the original Model S. As it turns out, it remains far superior to the charging standards created by legacy automakers today, who were more concerned with having a simple plug-in port than the efficiency and quality of the charging process itself.

Unlike CCS1 or J1772, which use analog communication when charging over AC power, NACS relies on digital communication, regardless of whether it’s charging the vehicle over AC or DC power. This enables better and more reliable information exchange during the charging process. In contrast, analog systems like CCS1 can run into issues—such as ground faults—that may leave your EV bricked without an explanation since data isn’t transmitted the same way.

With NACS, however, any issues can be diagnosed on either the vehicle side or the Supercharger side. If you’re interested - open up Service Mode while plugged into your Wall or Mobile Connector, or while at a Supercharger - and take a peek at the Charging Pane.

Ultimately, NACS offers improved diagnostics and testing, a more intuitive cable and interface, and the best part is that it can support up to 1,000V charging without major changes. Plus, it works seamlessly with both residential two-phase and commercial three-phase power without requiring major alterations to the connector format—unlike CCS1 and CCS2, which uses separate connectors for AC and DC charging.

Improved Communications

We’ve already discussed how digital communication enables effective debugging, but it also plays a crucial role in streamlining the payment process for charging. This is how Tesla makes its Supercharging experience so effortless. When you plug in your vehicle, it communicates directly with the Supercharger and Tesla’s servers. Your payment is automatically processed through the payment method linked to your Tesla profile, making the entire process seamless.

In contrast, with most CCS1 chargers, the process is the reverse. While Plug-and-Charge is a standard, it’s not always fully or reliably implemented. When you arrive at a CCS1 charger, you often need to plug in your EV, fumble with an app or the screen and hope the charging post is working properly before you can proceed.

Charging an EV?
It’s as easy as 1. 2. 3… 4 pic.twitter.com/d2e2hjL9Ea
— The Kilowatts 🚗⚡️ (@klwtts) January 26, 2023

Who’s using NACS?

Here’s a list of automakers that have either pledged to begin using NACS - usually by their 2025 or 2026 model year - or have already incorporated it. Many of these companies also offer adapters, and can also use Tesla’s Magic Dock-equipped Superchargers.

Any companies in parentheses represent a sub-brand of the parent company that has also committed to the NACS connector.

Audi
Aston Martin (No EVs)
BMW (MINI, Rolls Royce)
Ford (Lincoln)
GM (Chevy, Buick, GMC, Cadillac)
Hyundai (Genesis)
Kia
Lucid
Mazda (No EVs)
Porsche
Rivian
Subaru
Nissan (Infiniti)
Toyota (Lexus)
Honda (Accura)
Mercedez-Benz
Stellantis (Dodge, Jeep, Chrysler, RAM, Fiat, Alfa Romeo, Maserati)
Volkswagen (Scout)
Volvo (Polestar)

And that’s it—NACS has won the EV charging standards race in North America. If you’re in Europe, you’re using the CCS2 connector, which is superior to the CCS1 connector offered in North America. China has its own relatively novel connector standard, but it still differentiates between DC and AC plugs, unlike NACS, which keeps things simpler.

Tesla Cybercab to Use Paint-Infused Plastic Panels as Production Hiring Gets Underway

February 27, 2025

By Karan Singh

Not a Tesla App

Tesla’s autonomous robotaxi made a big impact last year at the We, Robot event in October, sparking plenty of questions about when, where, and how production would begin. Well, it looks like we finally have some answers to these questions thanks to new Cybercab-related job openings.

Engineering Roles

Tesla is actively recruiting engineers to focus on various aspects of the Cybercab’s production. One of the key positions is for an equipment engineer, responsible for developing the machinery that will be used to build the Cybercab. Designing and implementing the assembly line is crucial, especially with Tesla’s ambition to manufacture thousands of Cybercabs in the near future.

Unboxed Production Process

Tesla plans to produce the Cybercab using its revolutionary “unboxed” process, which stands in stark contrast to traditional car manufacturing methods. Unlike typical assembly lines that build vehicles from the floor up, the unboxed process involves constructing vehicle sections in parallel and bringing those parts together for final assembly. This method increases the number of engineers that can work on the vehicle at once and increases accessibility for works and robots, allowing the vehicle to be manufactured more efficiently.

Tesla shows off the unboxed process in the vehicle below:

The Unboxed process 🧵
Tesla model Y is used in this video as a placeholder to explain the process without spoiling the actual next gen vehicle pic.twitter.com/onCPeNCduB
— Michel L. B. (@baube19) March 2, 2023

Paint-Infused Plastic Panels

A crucial part of the Cybercab’s production will be handled by a new process engineer specializing in plastics. This engineer will focus on the exterior plastic panels, working alongside a tool & die specialist. The reason for this specialized role is likely due to the Cybercab’s unique use of paint-impregnated plastic for its exterior panels, which requires different processes and tooling than Tesla’s typical vehicle exteriors.

Tesla’s VP of Vehicle Engineering, Lars Moravy, shared that the company will be injecting polyurethane paint directly into the plastic during the manufacturing process. This method eliminates the need for a traditional paint shop, as the colors are embedded directly into the plastic while the panels are molded. The best part is that these panels are highly resilient—if they get scratched, dinged, or worn down, the original color remains visible throughout, unlike standard painted panels, which would reveal the underlying material.

Technicians

To implement these new engineering practices, Tesla is also hiring various technicians for the assembly line. These include specialists in plastics, general assembly, and the Giga Press, all of whom will play key roles in bringing the Cybercab to life.

This information was revealed in a recent episode of the Ride the Lightning podcast, where Lars discussed several exciting topics, including the upcoming refreshes for the Model S and Model X.

According to the Q4 2024 Earnings Call, the Cybercab’s assembly line is not expected to launch until late 2025 or early 2026. Building such an innovative assembly line is no small feat, and it’s clear Tesla is laying the groundwork for something special.