how to troubleshoot my 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

524 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 troubleshoot and fix your Tesla Model S (2012-2020) that won't turn on. Step-by-step guide with diagnostic steps 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 components to avoid short circuits.

Symptoms

•No response when pressing the brake pedal or the power button
•Dashboard lights remain off
•No sounds or notifications upon attempting to start
•Interior lights may be dim or unresponsive
•Key fob not recognized by the vehicle

Diagnostic Steps

1
Ensure the vehicle is in 'Park' mode.
2
Check the 12V battery voltage using a multimeter; it should be above 12.4 volts.
3
Inspect the key fob battery and replace if necessary.
4
Attempt to reset the vehicle by holding down the scroll wheel buttons on the steering wheel until the screen reboots.
5
Check for any visible signs of damage to wiring or connectors under the front trunk.
6
Use the Tesla app or online account to check for any alerts or notifications regarding the vehicle's status.

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
•Flathead screwdriver
•Socket set (10mm)

Parts Required

•12V battery (if replacement is needed)
•CR2032 key fob battery

Related Faults

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Diagnostic Steps

1
Ensure the vehicle is in 'Park' mode.
2
Check the 12V battery voltage using a multimeter; it should be above 12.4 volts.
3
Inspect the key fob battery and replace if necessary.
4
Attempt to reset the vehicle by holding down the scroll wheel buttons on the steering wheel until the screen reboots.
5
Check for any visible signs of damage to wiring or connectors under the front trunk.
6
Use the Tesla app or online account to check for any alerts or notifications regarding the vehicle's status.

Solution

1. Preparation

Gather tools: Multimeter, flathead screwdriver, and a new key fob battery.
Ensure you are in a safe environment to work on the vehicle.
Disconnect the vehicle from any charging source.

2. Check and Replace the 12V Battery

Sub-step 1: Open the front trunk and locate the 12V battery.
Sub-step 2: Disconnect the negative terminal first, followed by the positive terminal.
Sub-step 3: Remove the old battery using a socket set (usually 10mm).
Sub-step 4: Install the new 12V battery in reverse order, ensuring it is securely fastened.
Sub-step 5: Reconnect the positive terminal first, followed by the negative terminal.

3. Replace Key Fob Battery

Sub-step 1: Use a flathead screwdriver to carefully pry open the key fob casing.
Sub-step 2: Remove the old battery and insert a new CR2032 battery, ensuring correct polarity.
Sub-step 3: Snap the key fob casing back together securely.

4. Reset the Vehicle

Sub-step 1: Sit inside the vehicle and close all doors.
Sub-step 2: Press and hold both scroll wheel buttons on the steering wheel until the touchscreen reboots (approximately 10 seconds).
Sub-step 3: Wait for the system to restart completely before attempting to power on the vehicle again.