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

555 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 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 negative terminal of the 12V battery before working on electrical systems.
•Wear safety glasses and gloves when handling batteries.

Symptoms

•Vehicle does not respond when the brake pedal is pressed
•No display activation on the touchscreen
•No sounds or alerts when attempting to start
•Key fob not recognized by the vehicle
•Possible warning lights illuminated on the dashboard

Diagnostic Steps

1
Check the key fob battery to ensure it has sufficient charge.
2
Verify that the 12V battery is charged and functioning by checking voltage with a multimeter.
3
Inspect for any visible damage or corrosion on the 12V battery terminals and connections.
4
Attempt to power on the vehicle while connected to a charger to rule out battery issues.
5
Use Tesla's mobile app to check the vehicle's status and any alerts.
6
Perform a soft reboot of the touchscreen by holding down both scroll wheels on the steering wheel.

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 charger
•Screwdriver set
•Socket set

Parts Required

•Key fob battery (CR2032)
•12V replacement battery (if needed)

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Diagnostic Steps

1
Check the key fob battery to ensure it has sufficient charge.
2
Verify that the 12V battery is charged and functioning by checking voltage with a multimeter.
3
Inspect for any visible damage or corrosion on the 12V battery terminals and connections.
4
Attempt to power on the vehicle while connected to a charger to rule out battery issues.
5
Use Tesla's mobile app to check the vehicle's status and any alerts.
6
Perform a soft reboot of the touchscreen by holding down both scroll wheels on the steering wheel.

Solution

1. Preparation

Tools Required: Multimeter, battery charger, screwdriver set
Ensure the vehicle is parked in a safe location with adequate space.

2. Inspect and Replace Key Fob Battery

Remove the physical key from the key fob.
Open the key fob casing using a small flat-head screwdriver.
Replace the battery (typically a CR2032) with a new one ensuring proper orientation.
Reassemble the key fob and test the vehicle.

3. Check and Replace 12V Battery

Tools Required: Socket set, multimeter
Disconnect the negative terminal of the 12V battery to ensure safety.
Check the voltage with a multimeter; it should read above 12.4 volts. If below, proceed with replacement.
Remove the 12V battery by unbolting it from its mount.
Install the new 12V battery, ensuring correct terminal connections (positive to positive, negative to negative).
Reconnect the negative terminal and secure all connections.

4. Inspect and Clean Battery Connections

Check for corrosion on all battery terminals and connections.
Clean terminals using a mixture of baking soda and water if corrosion is found.
Reconnect terminals securely after cleaning.

5. Perform System Reset

With the vehicle in park, press and hold both scroll wheels on the steering wheel until the touchscreen reboots.
Wait for the system to restart and check if the vehicle powers on.