my Tesla Model S Original (2012-2020) won't turn on after charging

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

522 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 that won't turn on after charging. 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 main battery pack if working on high-voltage systems.
•Always use caution when working with electrical components.

Symptoms

•No response when the ignition button is pressed
•Dashboard lights and instrumentation not illuminating
•No audible sounds from the vehicle (e.g., fans, pumps)
•Possible error messages on the screen (if applicable)
•Battery charge indicator may show as full or fluctuating

Diagnostic Steps

1
Check the status of the key fob to ensure it is functioning properly.
2
Attempt to perform a soft reset by holding down both scroll wheels on the steering wheel until the screen reboots.
3
Inspect the charging cable and connector for any damage or debris.
4
Verify the vehicle’s charging status through the Tesla app or onboard display.
5
Check for any error codes using the Tesla service mode or diagnostic tools if accessible.
6
Examine the 12V battery voltage to ensure it is within the acceptable range (12.4 - 12.6 volts).

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

•Multimeter
•Basic hand tools (screwdrivers, socket set)

Parts Required

•New 12V battery (specific to Tesla Model S)

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Diagnostic Steps

1
Check the status of the key fob to ensure it is functioning properly.
2
Attempt to perform a soft reset by holding down both scroll wheels on the steering wheel until the screen reboots.
3
Inspect the charging cable and connector for any damage or debris.
4
Verify the vehicle’s charging status through the Tesla app or onboard display.
5
Check for any error codes using the Tesla service mode or diagnostic tools if accessible.
6
Examine the 12V battery voltage to ensure it is within the acceptable range (12.4 - 12.6 volts).

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe and accessible location.
Disconnect the charging cable from the vehicle.

Tools Required:

Multimeter
Basic hand tools (screwdrivers, socket set)

2. Inspect and Replace the 12V Battery

Access the 12V Battery:
- Open the front trunk (frunk) and locate the 12V battery, usually found on the driver’s side under a cover.
- Remove the cover screws using a socket set.
Test the 12V Battery:
- Use a multimeter to check the voltage of the 12V battery.
- If the voltage is below 12.4 volts, proceed to replace the battery.
Remove the Old Battery:
- Disconnect the negative terminal first, followed by the positive terminal.
- Unscrew any securing brackets and remove the old battery.
Install the New Battery:
- Place the new 12V battery into the battery compartment.
- Secure it with brackets and reconnect the positive terminal first, then the negative terminal.
- Replace the cover and secure it with screws.

3. Reset the Vehicle Systems

Perform a Hard Reset:
- After the new battery is installed, perform a hard reset by pressing the brake pedal and holding the ignition button until the display comes on.
Check for Error Messages:
- Review the dashboard for any error messages and address them accordingly.