how do I fix my 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

582 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 starting issues in Tesla Model S (2012-2020) with clicking sound. Step-by-step guide for troubleshooting and repair.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the main battery before working on electrical systems.
•Always wear safety gloves and eye protection.

Symptoms

•Clicking sound when turning the key or pressing the start button
•Dashboard lights may flicker or appear dim
•No engine turnover or cranking noise
•Possible 'Battery Charge Low' warning on the display
•Inability to engage the drive or reverse gears

Diagnostic Steps

1
Check the 12V Battery Voltage: Use a multimeter to measure the voltage of the 12V battery. It should read above 12.4 volts for a healthy battery.
2
Inspect Battery Connections: Visually check and ensure that the battery terminals are clean, tight, and free of corrosion.
3
Look for Fault Codes: Use the Tesla service menu or a compatible OBD-II scanner to check for any fault codes that might indicate an issue.
4
Verify Charging Status: Check if the vehicle is charging properly and the charging port light is functioning.
5
Test the High-Voltage Battery: If possible, access the vehicle's diagnostics to check the status of the main battery pack for any errors or alerts.

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
•Cleaning brush
•Safety gloves
•Eye protection

Parts Required

•New 12V battery (compatible with Tesla Model S)

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Diagnostic Steps

1
Check the 12V Battery Voltage: Use a multimeter to measure the voltage of the 12V battery. It should read above 12.4 volts for a healthy battery.
2
Inspect Battery Connections: Visually check and ensure that the battery terminals are clean, tight, and free of corrosion.
3
Look for Fault Codes: Use the Tesla service menu or a compatible OBD-II scanner to check for any fault codes that might indicate an issue.
4
Verify Charging Status: Check if the vehicle is charging properly and the charging port light is functioning.
5
Test the High-Voltage Battery: If possible, access the vehicle's diagnostics to check the status of the main battery pack for any errors or alerts.

Solution

1. Preparation

Tools Required: Multimeter, socket set, cleaning brush, safety gloves, and eye protection.
Safety Warnings: Disconnect the main battery before working on electrical systems. Always wear safety gloves and eye protection.

2. 12V Battery Replacement

Access the Battery Compartment: Open the front trunk (frunk) to gain access to the 12V battery.
Disconnect the Negative Terminal: Use a socket set to remove the negative battery terminal first to prevent any electrical short.
Disconnect the Positive Terminal: Remove the positive terminal after disconnecting the negative.
Remove the Old Battery: Unclamp and lift out the old 12V battery. Dispose of it according to local regulations.
Install the New Battery: Place the new 12V battery in the compartment, ensuring the orientation is correct.
Reconnect the Positive Terminal: Attach the positive terminal first, securing it tightly.
Reconnect the Negative Terminal: Finally, attach the negative terminal, ensuring it is also secure.

3. Clean Battery Connections

Inspect Terminals: Check the battery terminals for corrosion or dirt.
Clean Connections: Use a cleaning brush to scrub the terminals and the cables to ensure a good electrical connection.
Reconnect and Tighten: After cleaning, reconnect the terminals securely.

4. Charge the Main Battery (if needed)

Connect to Charger: If the high-voltage battery is low, connect the vehicle to a Tesla charger.
Monitor Charging: Ensure that the vehicle is receiving charge and the charging status indicator is functioning correctly.