my Tesla Model S Plaid/Refresh (2021-present) 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

486 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 Plaid. 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.
•Allow the vehicle to sit for a few minutes after powering down to avoid electrical shock.

Symptoms

•Clicking noise when attempting to start
•Dashboard lights flickering or dim
•No engine cranking or turnover
•Possible 'Battery Low' warning displayed
•Electrical components (e.g., headlights, interior lights) may be dim or non-functional

Diagnostic Steps

1
Check the vehicle's battery level using the Tesla app or through the dashboard display.
2
Inspect the 12V battery for any visible damage or corrosion on terminals.
3
Use a multimeter to measure the voltage of the 12V battery (should be around 12.6V when fully charged).
4
Verify that the main battery pack is charged by checking the charging status.
5
Test the 12V battery's health using a battery tester to ensure it can hold a charge.
6
Check for any error messages or alerts in the vehicle's software via the touchscreen.

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
•Battery tester
•Socket set
•Wrenches

Parts Required

•New 12V battery (if replacement is needed)

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Diagnostic Steps

1
Check the vehicle's battery level using the Tesla app or through the dashboard display.
2
Inspect the 12V battery for any visible damage or corrosion on terminals.
3
Use a multimeter to measure the voltage of the 12V battery (should be around 12.6V when fully charged).
4
Verify that the main battery pack is charged by checking the charging status.
5
Test the 12V battery's health using a battery tester to ensure it can hold a charge.
6
Check for any error messages or alerts in the vehicle's software via the touchscreen.

Solution

1. Preparation

Tools Required: Multimeter, battery tester, socket set, wrenches
Confirm the vehicle is in a safe location and ensure the parking brake is engaged.

2. Inspect the 12V Battery

Disconnect the negative terminal of the 12V battery to prevent any electrical shorts.
Remove the positive terminal and inspect for corrosion or damage. Clean the terminals with a wire brush if necessary.
Reconnect the terminals securely.

3. Replace the 12V Battery (if necessary)

If the battery voltage is below 12.4V or the battery tester indicates poor health, replace the 12V battery.
- Sub-steps:
  - Remove the cover or panel to access the 12V battery.
  - Unscrew and remove the old battery.
  - Install the new battery, ensuring the positive terminal connects first followed by the negative terminal.
  - Secure the battery and replace any covers.

4. Check Main Battery Connection

If the vehicle still does not start, inspect the connectors for the main battery pack for security and corrosion.
Ensure all connections are tight and free of debris.

5. Reconnect Battery and Test

Reconnect the 12V battery terminals securely.
Power on the vehicle and check if it starts normally.