how to troubleshoot my Tesla Model S Original (2012-2020) that won't start

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

508 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 troubleshoot and fix a no-start condition 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 any power sources before servicing electrical components.
•Allow the vehicle to cool before working on the battery.

Symptoms

•Touchscreen display remains blank or unresponsive
•No sounds or clicks when attempting to start
•Key fob not recognized by the vehicle
•Dashboard warning lights illuminated
•Vehicle does not respond to gear selection

Diagnostic Steps

1
Check the key fob battery and replace if low.
2
Ensure the vehicle is in 'Park' mode; attempt to shift to 'Drive' and back to 'Park.'
3
Inspect the 12V battery voltage using a multimeter; it should be above 12.5V.
4
Connect the Tesla app to check for any alerts or diagnostics.
5
Perform a soft reset of the touchscreen by holding the scroll wheels on the steering wheel until the screen reboots.
6
Check the charging cable connection and ensure the vehicle has adequate charge.

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
•12V battery charger
•Flathead screwdriver

Parts Required

•Replacement 12V battery (if necessary)
•Replacement key fob battery (if necessary)

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Diagnostic Steps

1
Check the key fob battery and replace if low.
2
Ensure the vehicle is in 'Park' mode; attempt to shift to 'Drive' and back to 'Park.'
3
Inspect the 12V battery voltage using a multimeter; it should be above 12.5V.
4
Connect the Tesla app to check for any alerts or diagnostics.
5
Perform a soft reset of the touchscreen by holding the scroll wheels on the steering wheel until the screen reboots.
6
Check the charging cable connection and ensure the vehicle has adequate charge.

Solution

1. Preparation

Gather necessary tools: Multimeter, 12V battery charger, and a flathead screwdriver.
Ensure the vehicle is in a safe location with adequate ventilation.

2. Check the 12V Battery

Sub-steps:
1. Open the front trunk and locate the 12V battery.
2. Use a multimeter to check the battery voltage.
3. If the voltage is below 12.5V, connect a 12V battery charger to the terminals.
4. Allow the battery to charge for at least 30 minutes.

Tools Required: Multimeter, 12V battery charger
Safety Warnings: Disconnect any power sources before servicing electrical components.

3. Inspect the Battery Connections

Sub-steps:
1. Inspect the 12V battery terminals for corrosion or loose connections.
2. If corrosion is present, clean with a mixture of baking soda and water.
3. Tighten any loose connections to ensure a solid electrical connection.

4. Perform a Hard Reset

Sub-steps:
1. Ensure the vehicle is in "Park."
2. Press and hold the brake pedal.
3. Hold down both scroll wheels on the steering wheel until the touchscreen reboots.

5. Check for Software Updates

Sub-steps:
1. Connect the vehicle to Wi-Fi, if possible.
2. Use the Tesla app to check for any available software updates.
3. If an update is available, follow the prompts to install.