how to fix a Tesla Model S Original (2012-2020) that won't turn on

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

508 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix a Tesla Model S (2012-2020) that won't turn on. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical systems.
•Ensure the vehicle is powered down completely before performing repairs.

Symptoms

•Dashboard lights not illuminating
•No sound from the vehicle when attempting to start
•Key fob not recognized
•"Vehicle is powering down" message displayed
•Unable to access the touchscreen interface

Diagnostic Steps

1
Check the key fob battery level and replace if necessary.
2
Attempt to power the vehicle on using the key fob or the mobile app.
3
Inspect the 12V battery voltage using a multimeter; it should be above 12.4V.
4
Verify that the vehicle is in 'Park' mode and check for any obstructions in the gear selector.
5
Check for any error messages on the touchscreen or in the app that may indicate a fault.
6
Inspect the main battery pack for any visible issues or damage.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Multimeter
•Trim removal tools

Parts Required

•New 12V battery

Related Faults

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Diagnostic Steps

1
Check the key fob battery level and replace if necessary.
2
Attempt to power the vehicle on using the key fob or the mobile app.
3
Inspect the 12V battery voltage using a multimeter; it should be above 12.4V.
4
Verify that the vehicle is in 'Park' mode and check for any obstructions in the gear selector.
5
Check for any error messages on the touchscreen or in the app that may indicate a fault.
6
Inspect the main battery pack for any visible issues or damage.

Solution

1. Preparation

Gather all required tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the vehicle from any charging source to prevent electrical hazards.

2. Replace the 12V Battery

Access the Battery:
- Open the front trunk (frunk) and remove any covers to access the 12V battery.
- Tools Required: Socket set, trim removal tools.
Disconnect Battery Cables:
- Use a socket wrench to loosen the negative (-) terminal first, then the positive (+) terminal.
- Safety Warning: Always disconnect the negative terminal first to prevent short circuits.
Remove the Old Battery:
- Loosen any securing brackets or straps and lift out the old battery.
- Dispose of the old battery according to local regulations.
Install the New Battery:
- Place the new 12V battery in the compartment.
- Reattach the positive (+) terminal first, followed by the negative (-) terminal.
Secure the Battery:
- Reattach any securing brackets or covers removed earlier.

3. Reset Vehicle Systems

Perform a Soft Reset:
- While seated in the driver’s seat, press and hold the scroll wheels on the steering wheel until the touchscreen reboots.
- Wait for the touchscreen to power back on.
Check for Software Updates:
- Ensure the vehicle is connected to Wi-Fi and check for software updates via the settings menu on the touchscreen.