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 Says 12V Power Socket Access Will Not Return With Sentry Mode

October 9, 2024

By Karan Singh

Not a Tesla App

It turns out that the big undocumented change in Tesla update 2024.32 that disables the 12V power and USB ports while Sentry Mode is active is not a bug but an intentional change.

A fan contacted Tesla Service to see if the change was intentional and what the reason behind the change was. Surprisingly, they received a response pretty quickly.

No 12V Power Access

Tesla has decided to restrict 12V power access for safety reasons—namely, to “reduce the likelihood of thermal events” when third-party devices are left powered on without users present. Tesla reached out to the fan in question by phone, and they seemed to be sticking to that line.

It seems that Tesla is resolute that it was due to safety reasons and that the change would not be “fixed” or allowed in a future software update – as this was an intentional change for safety reasons.

Other sources have reported that the change was due to potential misuse of the 12V power access, with people wiring 1200w microwaves and kettles or jury-rigging 240v to 120v adapters, which had apparently been the cause of multiple fires in Tesla vehicles within China.

Workarounds

Thankfully, for those who camp or need to keep their sub-trunk fridges powered while still having security in their vehicles, there is a simple, although inconvenient, workaround. You can enable Camp Mode, then manually lock your car (since Camp Mode turns off walk-away door locking) and turn off climate controls from the app.

While Sentry will NOT be active with this workaround, the car's power sockets remain powered. While this workaround is fine to use occasionally, it’ll be tiresome for those who use a fridge regularly.

We’re still hoping Tesla considers bringing the Cybertruck’s Power Control menu to the rest of its vehicles and is somehow able to limit the max draw from these outlets to prevent dangerous situations.

Join Our Tesla Robotaxi Event Prediction Contest

October 9, 2024

By Karan Singh

Tesla

With the Robotaxi event just a day away, we thought it would be a fun idea to run a contest to predict what Tesla will announce tomorrow evening.

We’ve outlined a list of questions below; simply answer them on our forums or social media (X or Threads), and be entered for a chance to win some great prizes.

The individuals who have the most correct answers will win one of five prizes mentioned below. If more than five people get them all right, a random drawing will be held from the pool of winners.

We’ll reach out to the winners either by email or by DM on social media.

The Questions

Will Tesla let attendees experience Robotaxi at the event?
Will Tesla first start the network with human supervision (ridesharing), or with Robotaxis only?
What year will the network start? When will it become fully autonomous? (if announced)
When will Robotaxi production begin? (if announced)
Will it be Robotaxi or Cybercab?
Which of these Robotaxi Concepts will be the closest to the one announced?
Will Robotaxi include:
1. Front-facing camera?
2. Stainless-steel body?
3. Steer-by-Wire or No Steering Wheel? (if announced)
4. Which current Tesla model has the most similar door-opening mechanism?
5. How many seats will the robotaxi have?
Will the robotaxi include AI5/Hardware 5, HW4 or something completely different?
Where will Tesla’s first Rideshare/Robotaxi location be established?
Will customers be able to purchase a Robotaxi?

Requirements

Please use the template below to answer the questions on social media or in our forums. You can post your answer as a comment to our forums, to our X post, or to our Threads post.

Once you do that, repost or quote post your favorite article from us.

1. Yes

2. Ridesharing

3. 2025/2027

4. 2025

5. Cybercab

6. Dominic's

7. Yes, Yes, SBW, No, 2

8. HW5

9. LA

10. Yes

Prizes

Prizes are generously provided by Enhance and Jowua, makers of some of the best Tesla accessories and amazing Tesla community members. Prizes will be mailed out directly by them. Winners will get to choose their prize from the list below. First place will have the first pick and so on. There will be five winners in total.

S3XY Buttons (including a commander and wiring)
S3XY Knob for Model 3/Y
Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)
Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)
Tesla Gaming Controller - Multi-Device Wireless Controller (Wireless Charging)

Disclaimer

This is a Tesla event, and Tesla normally likes to hold their cards close to their chest. If an answer is ambiguous, we’ll go with the best choice decided by our staff. We’ll do our best to be fair. This

With all that said, we wish our entrants the best of luck, and we’ll announce the winners at the end of the week.