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

572 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). 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 to avoid shock or short circuits.
•Ensure the vehicle is in a safe area and the high voltage system is properly managed during diagnostics.

Symptoms

•Clicking noise when the start button is pressed
•Dashboard lights illuminating briefly
•No engine cranking or turnover
•Possible 'Battery Low' or 'Power Reduced' message on the display
•Inability to engage the vehicle in gear

Diagnostic Steps

1
Check the 12V battery voltage using a multimeter; it should be above 12.4 volts for normal operation.
2
Inspect the 12V battery terminals for corrosion or loose connections.
3
Use the Tesla mobile app to check for any fault notifications or alerts.
4
Test the main battery pack's state of charge via the touchscreen interface.
5
Ensure that the vehicle is in 'Park' mode; if not, adjust accordingly.
6
Inspect the vehicle's fuses related to the starting system for any blown fuses.

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
•Tesla diagnostic tool or mobile app
•Battery terminal cleaner
•Safety gloves

Parts Required

•Replacement 12V battery

Related Faults

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Diagnostic Steps

1
Check the 12V battery voltage using a multimeter; it should be above 12.4 volts for normal operation.
2
Inspect the 12V battery terminals for corrosion or loose connections.
3
Use the Tesla mobile app to check for any fault notifications or alerts.
4
Test the main battery pack's state of charge via the touchscreen interface.
5
Ensure that the vehicle is in 'Park' mode; if not, adjust accordingly.
6
Inspect the vehicle's fuses related to the starting system for any blown fuses.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe area with ample space to work.
Disconnect the 12V battery before performing any electrical work.

2. Inspect and Replace the 12V Battery

Tools Required: Socket set, multimeter, battery terminal cleaner, safety gloves.
Sub-steps:
1. Remove the front trunk liner to access the 12V battery.
2. Use a multimeter to measure the 12V battery voltage; if it is below 12.4 volts, it needs replacement.
3. Disconnect the negative terminal first, then the positive terminal from the old battery.
4. Remove the old battery from its tray.
5. Install the new 12V battery in the reverse order: secure it in place, connect the positive terminal first, then the negative terminal.
6. Ensure all connections are tight and free of corrosion.

3. Check and Reset the High Voltage Battery

Tools Required: Tesla diagnostic tool or mobile app.
Sub-steps:
1. Use the Tesla mobile app or diagnostic tool to check the status of the main battery pack.
2. If the main battery pack shows low state of charge, connect the vehicle to a supercharger or home charger to recharge it.
3. After sufficient charging, attempt to start the vehicle again.
4. If issues persist, perform a soft reset of the vehicle by holding down both scroll buttons on the steering wheel until the touchscreen reboots.