why does my Tesla Model S Original (2012-2020) make a clicking noise when I start it

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 the clicking noise on startup in 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 battery before working on electrical systems to prevent shocks
•Wear safety glasses when working with batteries to protect against corrosive materials

Symptoms

•Clicking noise when pressing the start button
•No vehicle power or systems powering up
•Dashboard lights flickering or non-responsive
•Possible failure to start or engage the drive
•Frequent clicking noise during attempts to start

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter to ensure it is within the normal range (12.4V to 12.6V)
2
Inspect the 12V battery terminals for corrosion or loose connections
3
Verify the condition of the main battery pack by checking the battery management system via the vehicle's touchscreen
4
Use an OBD-II scanner to check for any fault codes related to the electrical system
5
Examine the starter relay and associated fuses for continuity

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
•OBD-II scanner
•Wire brush

Parts Required

•New 12V battery
•Replacement fuses or relays (if necessary)

Related Faults

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter to ensure it is within the normal range (12.4V to 12.6V)
2
Inspect the 12V battery terminals for corrosion or loose connections
3
Verify the condition of the main battery pack by checking the battery management system via the vehicle's touchscreen
4
Use an OBD-II scanner to check for any fault codes related to the electrical system
5
Examine the starter relay and associated fuses for continuity

Solution

1. Preparation

Gather necessary tools: multimeter, socket set, OBD-II scanner, and cleaning supplies.
Ensure the vehicle is in park and the parking brake is engaged.

2. Test and Replace 12V Battery

Voltage Check:
- Connect the multimeter to the 12V battery terminals.
- If the voltage is below 12.4V, proceed to replace the battery.
Disconnect Battery:
- Disconnect the negative terminal first, followed by the positive terminal.
Remove Old Battery:
- Use a socket set to remove the battery hold-down bracket.
- Lift out the old battery carefully.
Install New Battery:
- Place the new 12V battery into the compartment.
- Reconnect the positive terminal first, followed by the negative terminal.

3. Inspect and Repair Electrical Connections

Check Connections:
- Inspect and clean any corrosion on the battery terminals and connectors using a wire brush.
- Tighten all connections to ensure secure contact.
Check Relay and Fuses:
- Locate the main fuse box and check the starter relay and fuses for any burn marks or damage.
- Replace any faulty fuses or relays.

4. Test Vehicle Functionality

Attempt to start the vehicle to verify if the clicking noise has ceased.