why does my Tesla Model S Original (2012-2020) make a clicking noise when starting?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

509 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 the clicking noise when starting your Tesla Model S (2012-2020). 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 components.
•Use caution when handling high-voltage systems; follow safety protocols as outlined in the vehicle's manual.

Symptoms

•Clicking noise when pressing the start button
•Dashboard lights flickering or dimming
•Vehicle unable to start or power on
•Possible error messages on the display
•Inconsistent power delivery during startup

Diagnostic Steps

1
Check the state of charge of the battery using the Tesla app or onboard display.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Run a diagnostic check using the onboard vehicle diagnostics to check for error codes.
4
Verify the functionality of the main battery pack by checking for any visible issues or alerts on the dashboard.
5
Examine the electric motor and inverter connections for signs of wear 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
•Torque wrench
•Multimeter
•Wire brush
•Cleaning supplies (baking soda solution)

Parts Required

•12V battery (if replacement is necessary)

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Diagnostic Steps

1
Check the state of charge of the battery using the Tesla app or onboard display.
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Run a diagnostic check using the onboard vehicle diagnostics to check for error codes.
4
Verify the functionality of the main battery pack by checking for any visible issues or alerts on the dashboard.
5
Examine the electric motor and inverter connections for signs of wear or damage.

Solution

1. Preparation

Gather tools: Socket set, torque wrench, multimeter, and cleaning supplies.
Ensure the vehicle is in a safe area, and the parking brake is engaged.
Disconnect the 12V battery before beginning work.

2. Inspect Battery Connections

Sub-steps:
1. Open the front trunk (frunk) to access the 12V battery compartment.
2. Remove the battery cover by unscrewing the fasteners using a socket set.
3. Inspect the positive and negative terminals for corrosion or looseness.
4. Clean the terminals with a wire brush and a baking soda solution if corrosion is present.
5. Tighten any loose connections securely using the torque wrench (typically 10-15 Nm).

3. Test 12V Battery

Sub-steps:
1. Disconnect the 12V battery and test it with a multimeter.
2. Check the voltage; it should read around 12.6 volts when fully charged.
3. If the voltage is significantly lower, replace the 12V battery with a new one.
4. Reconnect the battery and ensure all connections are tight.

4. Check Main Battery Pack

Sub-steps:
1. Access the main battery pack from the underside of the vehicle.
2. Inspect for any visible leaks, physical damage, or loose connections.
3. Ensure that all high-voltage connectors are secure and undamaged.
4. If any issues are found, consult a Tesla technician for further diagnosis.