how to fix Tesla Model S Original (2012-2020) doors not unlocking with key fob?

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

465 words

Problem Statement

Learn how to fix the key fob unlocking issue for Tesla Model S (2012-2020). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle's battery if working on electrical components.

Symptoms

•Key fob not responding when attempting to unlock doors
•No LED light activation on the key fob
•Doors remain locked despite pressing the unlock button
•Occasional unlock response followed by immediate relock
•Vehicle's interior display does not indicate key fob detection

Diagnostic Steps

1
Replace the battery in the key fob to eliminate low battery issues.
2
Check for physical damage or water exposure on the key fob.
3
Verify that the key fob is properly synced with the vehicle by attempting to unlock manually.
4
Inspect the vehicle's door lock actuators for signs of malfunction.
5
Use the Tesla app to check if remote access and unlocking features are functioning.
6
Scan the vehicle's system for any error codes related to the keyless entry system.

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

•Small screwdriver
•Trim removal tool
•Socket set

Parts Required

•CR2032 battery
•Door lock actuator (if needed)

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Diagnostic Steps

1
Replace the battery in the key fob to eliminate low battery issues.
2
Check for physical damage or water exposure on the key fob.
3
Verify that the key fob is properly synced with the vehicle by attempting to unlock manually.
4
Inspect the vehicle's door lock actuators for signs of malfunction.
5
Use the Tesla app to check if remote access and unlocking features are functioning.
6
Scan the vehicle's system for any error codes related to the keyless entry system.

Solution

1. Key Fob Battery Replacement

Sub-steps:
1. Use a small screwdriver to carefully open the key fob case.
2. Remove the old battery and replace it with a new CR2032 battery, ensuring the positive side is facing up.
3. Reassemble the key fob case securely.

2. Key Fob Resynchronization

Sub-steps:
1. Enter the vehicle and place the key fob in the designated area (near the center console).
2. On the touchscreen, go to 'Controls' > 'Keys' > 'Add Key'.
3. Follow the prompts to sync the key fob with the vehicle.

3. Inspect Door Lock Actuators

Sub-steps:
1. Remove the door panel using a trim removal tool and a socket set.
2. Locate the door lock actuator and inspect for any signs of damage or disconnection.
3. If damaged, disconnect the actuator and replace it with a new part.
4. Reassemble the door panel and test the locks.

4. Software Update

Sub-steps:
1. Ensure the vehicle is connected to Wi-Fi and check for software updates.
2. If an update is available, initiate the update process from the touchscreen.
3. Once completed, test the key fob functionality again.