my Tesla Model S Original (2012-2020) won’t start just clicks what should I check

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

511 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 no-start issue in Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the high-voltage battery before working on electrical systems.
•Wear safety gloves and goggles when handling batteries and electrical components.

Symptoms

•Clicking sound when attempting to start the vehicle
•Dashboard lights may dim or flicker
•No response from the powertrain
•Possible error messages on the display
•Inconsistent operation of electrical components (e.g., radio, lights)

Diagnostic Steps

1
Check the battery charge level using the vehicle's display.
2
Inspect the 12V battery voltage with a multimeter; it should be above 12.4 volts.
3
Examine battery terminals for corrosion or loose connections.
4
Scan for error codes using an OBD-II scanner or Tesla diagnostic tool.
5
Test the functionality of the key fob; ensure it’s working and properly communicating with the vehicle.
6
Inspect the contactors and relays in the battery management system for proper operation.

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
•Wire brush
•Screwdriver set

Parts Required

•New 12V battery (if faulty)
•Replacement contactors or relays (if defective)

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Diagnostic Steps

1
Check the battery charge level using the vehicle's display.
2
Inspect the 12V battery voltage with a multimeter; it should be above 12.4 volts.
3
Examine battery terminals for corrosion or loose connections.
4
Scan for error codes using an OBD-II scanner or Tesla diagnostic tool.
5
Test the functionality of the key fob; ensure it’s working and properly communicating with the vehicle.
6
Inspect the contactors and relays in the battery management system for proper operation.

Solution

1. Preparation

Gather required tools and parts.
Ensure the vehicle is on a flat surface and secured.
Disconnect the vehicle from any charging source.

2. Check and Replace 12V Battery

Tools Required: Socket set, multimeter, safety gloves, and goggles.
Sub-steps:
1. Open the front trunk and locate the 12V battery.
2. Use a multimeter to measure the voltage; if below 12.4 volts, proceed with replacement.
3. Disconnect the negative terminal first, followed by the positive terminal.
4. Remove the battery hold-down bracket and carefully extract the old battery.
5. Install the new 12V battery in reverse order, ensuring terminals are tightened securely.

3. Inspect and Clean Battery Connections

Tools Required: Wire brush, cleaning solution, and socket set.
Sub-steps:
1. Check the battery terminals and cables for corrosion.
2. Clean any corrosion with a wire brush and a cleaning solution.
3. Ensure all connections are tight and corrosion-free before reassembly.

4. Check Contactors and Relays

Tools Required: Multimeter, screwdriver set.
Sub-steps:
1. Access the battery management system compartment (refer to service manual for specifics).
2. Inspect contactors and relays for visible signs of damage or wear.
3. Use a multimeter to test for continuity and proper operation.
4. Replace any faulty components as necessary, following manufacturer specifications.