how to fix the power trunk not opening in my Tesla Model 3 Original (2017-2023)

Tesla Model 3 Highland (2024-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 words

Problem Statement

Learn how to diagnose and fix the power trunk not opening issue in Tesla Model 3 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to prevent shorts or shocks.

Symptoms

•Trunk does not respond when the button is pressed on the key fob or inside the vehicle
•Trunk does not open when using the mobile app
•Audible clicking sound from the trunk area when attempting to open
•Warning message on the dashboard related to trunk malfunction
•Manual opening of the trunk is possible but requires more force than usual

Diagnostic Steps

1
Inspect the key fob battery and replace if necessary.
2
Verify that the trunk release button inside the vehicle is functioning correctly.
3
Check the mobile app connectivity and ensure that it is updated.
4
Use an OBD-II scanner to check for any error codes related to the trunk system.
5
Inspect the wiring and connectors near the trunk latch for any damage or disconnections.
6
Test the trunk release mechanism manually to confirm its mechanical function.

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

•Flathead screwdriver
•Torx screwdriver set
•Multimeter

Parts Required

•CR2032 key fob battery
•Trunk latch assembly (if faulty)

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Symptoms

•Trunk does not respond when the button is pressed on the key fob or inside the vehicle

•Trunk does not open when using the mobile app

•Audible clicking sound from the trunk area when attempting to open

•Warning message on the dashboard related to trunk malfunction

•Manual opening of the trunk is possible but requires more force than usual

Diagnostic Steps

1
Inspect the key fob battery and replace if necessary.
2
Verify that the trunk release button inside the vehicle is functioning correctly.
3
Check the mobile app connectivity and ensure that it is updated.
4
Use an OBD-II scanner to check for any error codes related to the trunk system.
5
Inspect the wiring and connectors near the trunk latch for any damage or disconnections.
6
Test the trunk release mechanism manually to confirm its mechanical function.

Solution

1. Preparation

Gather tools: flathead screwdriver, Torx screwdriver set, multimeter, and a new key fob battery if needed.
Ensure the vehicle is parked on a flat surface and turned off.
Disconnect the 12V battery for safety.

2. Inspect and Replace Key Fob Battery

Sub-steps:
1. Open the key fob using a flathead screwdriver.
2. Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
3. Reassemble the key fob and test the trunk release.

3. Access and Inspect Trunk Release Mechanism

Sub-steps:
1. Remove the interior trim panel from the trunk using a Torx screwdriver.
2. Locate the trunk release latch and inspect for any obstructions or damage.
3. Use a multimeter to check for voltage at the trunk latch connector when the release button is pressed.
4. If no voltage is detected, trace the wiring back to the control module for continuity.

4. Repair or Replace Trunk Release Mechanism

Sub-steps:
1. If the trunk latch mechanism is faulty, remove the two Torx screws securing it.
2. Disconnect the electrical connector and remove the latch.
3. Install the new trunk latch by reversing the steps, ensuring all connections are secure.
4. Reattach the interior trim panel and ensure all clips are secured.

5. Reconnect Battery and Test

Sub-steps:
1. Reconnect the 12V battery.
2. Test the trunk release using both the key fob and inside the vehicle.
3. Verify that the trunk opens smoothly and without any unusual noises.