how to fix a Tesla Model S Original (2012-2020) that won’t start and just clicks?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

510 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 start and just clicks. 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 negative battery terminal before working on the electrical system.
•Wear safety gloves when handling batteries to prevent acid burns.

Symptoms

•Clicking sound when the start button is pressed
•Dashboard lights dim or flicker during the starting attempt
•No motor engagement or engine cranking
•Possible 'Battery Management System' warning on the screen
•Reduced power or range displayed prior to the starting issue

Diagnostic Steps

1
Inspect the 12V battery voltage using a multimeter; it should be above 12.4V.
2
Check the 12V battery connections for corrosion or looseness.
3
Use the Tesla mobile app or touchscreen to check for any active alerts or error messages.
4
Test the main battery pack for proper voltage levels and functionality.
5
Verify that the vehicle’s firmware is up to date.
6
Attempt to jump-start the vehicle using a portable battery jump starter.

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
•Socket set
•Screwdrivers
•Wire brush
•Cleaning solution
•Safety gloves

Parts Required

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

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Diagnostic Steps

1
Inspect the 12V battery voltage using a multimeter; it should be above 12.4V.
2
Check the 12V battery connections for corrosion or looseness.
3
Use the Tesla mobile app or touchscreen to check for any active alerts or error messages.
4
Test the main battery pack for proper voltage levels and functionality.
5
Verify that the vehicle’s firmware is up to date.
6
Attempt to jump-start the vehicle using a portable battery jump starter.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe and flat area.
Disconnect the vehicle from the charging cable, if connected.

2. Check and Replace the 12V Battery

Tools Required: Multimeter, socket set, screwdrivers, safety gloves.
Sub-steps:
1. Open the front trunk (frunk) and locate the 12V battery.
2. Disconnect the negative terminal first, followed by the positive terminal.
3. Remove the battery securing bracket using the appropriate socket.
4. Carefully lift out the old 12V battery and replace it with a new one.
5. Reconnect the positive terminal first, followed by the negative terminal.
6. Secure the battery with the bracket.

3. Inspect and Clean Electrical Connections

Tools Required: Wire brush, cleaning solution, rags.
Sub-steps:
1. Inspect all battery terminals and connections for corrosion.
2. Clean any corrosion using a wire brush and cleaning solution.
3. Ensure all connections are tight and secure.

4. Reset Vehicle Systems

Tools Required: None.
Sub-steps:
1. Press and hold both scroll wheels on the steering wheel until the touchscreen resets.
2. Allow the vehicle to fully reboot before attempting to start again.

5. Test Vehicle Functionality

Tools Required: None.
Sub-steps:
1. Press the start button to check if the vehicle starts.
2. If it starts, monitor for any warning messages on the display.