why does my Tesla Model 3 Highland (2024-present) trunk not open from the fob

Tesla Model 3 Highland (2024-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

443 words

Problem Statement

Learn how to diagnose and fix the trunk not opening issue in Tesla Model 3 Highland. 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

•Always ensure the vehicle is in park before performing any repairs or inspections.
•Disconnect the vehicle's power source if working on electrical components.

Symptoms

•Trunk does not respond when the fob button is pressed
•Trunk can be opened manually
•No audible sound or alert when the fob button is pressed
•Other fob functions (e.g., locking/unlocking doors) work correctly
•Trunk release button on the interior does not work

Diagnostic Steps

1
Check the key fob battery for charge and replace if necessary.
2
Ensure the key fob is within the operational range of the vehicle.
3
Examine the trunk latch and wiring for any visible damage or disconnection.
4
Test the trunk release function via the Tesla app to see if the issue persists.
5
Scan the vehicle for any fault codes using the onboard diagnostics tool.
6
Reset the vehicle’s software to eliminate any temporary glitches.

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 flathead screwdriver
•New CR2032 battery
•OBD-II scanner

Parts Required

•CR2032 battery
•Trunk latch assembly

Related Faults

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Diagnostic Steps

1
Check the key fob battery for charge and replace if necessary.
2
Ensure the key fob is within the operational range of the vehicle.
3
Examine the trunk latch and wiring for any visible damage or disconnection.
4
Test the trunk release function via the Tesla app to see if the issue persists.
5
Scan the vehicle for any fault codes using the onboard diagnostics tool.
6
Reset the vehicle’s software to eliminate any temporary glitches.

Solution

1. Key Fob Battery Replacement

Sub-steps:
1. Open the key fob using a small flathead screwdriver.
2. Remove the old battery (typically a CR2032) and replace it with a new one.
3. Ensure the battery is oriented correctly (+ side facing up).
4. Reassemble the key fob.

2. Inspect Trunk Latch and Wiring

Sub-steps:
1. Open the trunk manually.
2. Visually inspect the latch mechanism for any obstructions or damage.
3. Check wiring connections to the latch for any signs of wear or disconnection.
4. If damage is found, replace the latch assembly.

3. Software Reset

Sub-steps:
1. Sit in the driver's seat with the vehicle in park.
2. Press and hold both scroll wheels on the steering wheel until the screen turns off and the Tesla logo appears.
3. Release the scroll wheels and allow the system to reboot.