my Tesla Model S Original (2012-2020) 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

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 the no-start issue 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 main power supply before working on electrical components.
•Allow the vehicle to sit for a few minutes after disconnecting the battery before working on any systems to ensure power is fully discharged.

Symptoms

•Clicking noise when the start button is pressed
•No power to dashboard lights or displays
•Inability to move the vehicle into gear
•Possible error messages on the touchscreen (e.g., 'Powertrain malfunction')
•Battery charge level is adequate but vehicle remains unresponsive

Diagnostic Steps

1
Check the vehicle's battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect battery terminals for corrosion or loose connections.
3
Verify the 12V battery health status using the Tesla app or onboard diagnostics.
4
Test the main power disconnect switch to ensure it is functioning properly.
5
Check for any fault codes using a Tesla diagnostic tool (if available).

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
•Torque wrench
•Wire brush

Parts Required

•12V battery (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Check the vehicle's battery voltage using a multimeter to ensure it is above 12.4 volts.
2
Inspect battery terminals for corrosion or loose connections.
3
Verify the 12V battery health status using the Tesla app or onboard diagnostics.
4
Test the main power disconnect switch to ensure it is functioning properly.
5
Check for any fault codes using a Tesla diagnostic tool (if available).

Solution

1. Preparation

Tools Required:
- Multimeter
- Socket set
- Torque wrench
Ensure the vehicle is parked on a flat surface and in "Park" mode.
Disconnect the main power supply before starting any repairs.

2. Inspect and Clean Battery Connections

Sub-steps:
1. Open the front trunk to access the 12V battery.
2. Remove the negative (-) terminal first, followed by the positive (+) terminal.
3. Inspect both terminals and cables for corrosion or damage.
4. Clean the terminals with a wire brush and a mixture of baking soda and water.
5. Reconnect the positive (+) terminal first, then the negative (-) terminal, ensuring a secure fit.

3. Replace the 12V Battery (if necessary)

Sub-steps:
1. If the battery voltage is low or the battery health is poor, replace the 12V battery.
2. Remove the battery cover by unscrewing the retaining bolts.
3. Disconnect the battery terminals as previously described.
4. Remove the old battery from its tray and install the new battery, ensuring it is secured properly.
5. Reconnect the terminals, positive first, and torque to manufacturer specifications (typically around 10-15 ft-lbs).

4. Reset the Power Disconnect Switch

Sub-steps:
1. Locate the main power disconnect switch (usually found under the front trunk).
2. Check for any signs of damage or malfunction.
3. If necessary, toggle the switch off and on to reset it.