my Tesla Model S Original (2012-2020) won't start and just clicks, what could be wrong?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

534 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 symptoms, diagnostic steps, 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 systems.
•Wear safety gloves and goggles when handling battery components.

Symptoms

•Clicking noise when attempting to start
•Dashboard lights dimming or flickering
•No response from the motor
•Possible 'Battery Charge Low' warning on the display
•Inability to engage the drive mode
•Reduced functionality of electronic features (e.g., lights, infotainment system)

Diagnostic Steps

1
Check the battery voltage using a multimeter to confirm if it is within the acceptable range (typically 12.6V or higher when fully charged).
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Use the Tesla mobile app or onboard diagnostics to check for any error codes related to the battery or electrical system.
4
Verify the state of charge of the main battery pack through the vehicle display.
5
Perform a reset of the vehicle systems by holding down the brake pedal and pressing the 'Power' button to see if the issue resolves.
6
Test the 12V battery by performing a load test to determine its health.

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
•Wrench set
•Battery terminal cleaner

Parts Required

•New 12V battery (if replacement is needed)

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Diagnostic Steps

1
Check the battery voltage using a multimeter to confirm if it is within the acceptable range (typically 12.6V or higher when fully charged).
2
Inspect the 12V battery connections for corrosion or loose terminals.
3
Use the Tesla mobile app or onboard diagnostics to check for any error codes related to the battery or electrical system.
4
Verify the state of charge of the main battery pack through the vehicle display.
5
Perform a reset of the vehicle systems by holding down the brake pedal and pressing the 'Power' button to see if the issue resolves.
6
Test the 12V battery by performing a load test to determine its health.

Solution

1. Preparation

Gather tools: multimeter, socket set, wrench set, battery terminal cleaner, and possibly a new 12V battery if replacement is necessary.
Ensure the vehicle is in "Park" mode and securely parked.

2. Inspect and Clean Battery Connections

Sub-steps:
- Open the front hood to access the 12V battery.
- Disconnect the negative terminal first, followed by the positive terminal.
- Clean the terminals and cable ends using a battery terminal cleaner to remove any corrosion.
- Reconnect the terminals, ensuring they are tight and secure (positive first, then negative).

3. Replace the 12V Battery (if necessary)

Sub-steps:
- Remove any covers or brackets securing the battery in place.
- Carefully lift out the old battery and replace it with a new one, ensuring it is the same type and size.
- Connect the positive terminal first, followed by the negative terminal.
- Secure any covers or brackets that were removed.

4. Test Vehicle

After replacing or cleaning the battery connections, attempt to start the vehicle.
If successful, monitor the battery levels and electrical system performance for any recurring issues.