my Tesla Model S Original (2012-2020) doors won't unlock remotely what's wrong

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

490 words

Problem Statement

Learn how to diagnose and fix the remote unlocking issue for 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

•Handle the screwdriver carefully to prevent injury.
•Disconnect the battery in a well-ventilated area and avoid contact with the terminals.
•Ensure the vehicle is parked safely during the update process.

Symptoms

•Doors do not unlock when pressing the key fob button
•Doors do not unlock through the Tesla mobile app
•No response from the vehicle when attempting to unlock remotely
•Key fob may not be detected by the vehicle
•Check Battery warning may appear for the key fob
•Possible intermittent unlocking issues

Diagnostic Steps

1
Check the key fob battery level and replace if low.
2
Verify that the key fob is within range of the vehicle.
3
Use the Tesla mobile app to confirm connectivity to the vehicle.
4
Inspect the vehicle's 12V battery for proper voltage and health.
5
Perform a soft reset of the vehicle's touchscreen interface.
6
Check for software updates for the vehicle and install 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

•Flat-head screwdriver
•Multimeter
•Wrench set
•Wi-Fi connection

Parts Required

•CR2032 key fob battery
•Compatible 12V battery

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Symptoms

•Doors do not unlock when pressing the key fob button

•Doors do not unlock through the Tesla mobile app

•No response from the vehicle when attempting to unlock remotely

•Key fob may not be detected by the vehicle

•Check Battery warning may appear for the key fob

•Possible intermittent unlocking issues

Diagnostic Steps

1
Check the key fob battery level and replace if low.
2
Verify that the key fob is within range of the vehicle.
3
Use the Tesla mobile app to confirm connectivity to the vehicle.
4
Inspect the vehicle's 12V battery for proper voltage and health.
5
Perform a soft reset of the vehicle's touchscreen interface.
6
Check for software updates for the vehicle and install if available.

Solution

1. Key Fob Battery Replacement

Sub-steps:
1. Open the key fob using a small flat-head screwdriver.
2. Replace the old battery (CR2032) with a new one, ensuring the positive side faces up.
3. Reassemble the key fob securely.
Tools Required: Flat-head screwdriver
Safety Warnings: Handle the screwdriver carefully to prevent injury.

2. Check and Replace 12V Battery

Sub-steps:
1. Open the front trunk (frunk) and locate the 12V battery.
2. Use a multimeter to check the battery voltage (should be around 12.6V).
3. If the battery voltage is low, disconnect the negative terminal first, followed by the positive terminal.
4. Remove the old battery and replace it with a new compatible 12V battery.
5. Reconnect the terminals (positive first, then negative).
Tools Required: Multimeter, wrench set
Safety Warnings: Disconnect the battery in a well-ventilated area and avoid contact with the terminals.

3. Software Update

Sub-steps:
1. Connect the vehicle to Wi-Fi.
2. Navigate to "Software" on the touchscreen and check for available updates.
3. If an update is available, follow the prompts to download and install it.
Tools Required: Wi-Fi connection
Safety Warnings: Ensure the vehicle is parked safely during the update process.