how to fix the rear trunk not opening on Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to diagnose and fix the rear trunk not opening issue on Tesla Model S (2012-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the 12V battery before working on electrical components to prevent shocks or shorts.
•Ensure the vehicle is in park and on a level surface before beginning repairs.

Symptoms

•Trunk release button does not respond
•Key fob does not open the trunk
•Manual trunk release lever does not function
•Trunk does not open when using the touchscreen
•Warning message displayed on the dashboard

Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Inspect the trunk release button for any visible damage or blockage.
3
Verify the connection of the trunk release harness by checking for loose or damaged wires.
4
Use an OBD-II scanner to check for any error codes related to the trunk mechanism.
5
Test the manual trunk release lever under the rear seat for functionality.

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

•Trim removal tool
•Screwdriver set
•Electrical tape
•Multimeter

Parts Required

•Trunk latch assembly (if defective)
•Trunk release button (if defective)
•Wiring harness (if damaged)

Related Faults

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Diagnostic Steps

1
Check the key fob battery and replace if necessary.
2
Inspect the trunk release button for any visible damage or blockage.
3
Verify the connection of the trunk release harness by checking for loose or damaged wires.
4
Use an OBD-II scanner to check for any error codes related to the trunk mechanism.
5
Test the manual trunk release lever under the rear seat for functionality.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is powered down and parked safely.
Disconnect the 12V battery for safety.

2. Access the Trunk Mechanism

Sub-steps:
1. Open the rear seat and locate the access panel for the trunk release mechanism.
2. Remove the access panel using a trim removal tool or screwdriver.
3. Inspect the trunk release mechanism for any obstructions or damage.

3. Inspect and Repair Wiring

Sub-steps:
1. Check the wiring harness connections to the trunk latch and release button.
2. Repair or replace any damaged wires using electrical tape or heat-shrink tubing.
3. Ensure all connections are secure and free from corrosion.

4. Replace Faulty Components

Sub-steps:
1. If the trunk latch or release button is found defective, remove the old component.
2. Install the new trunk latch or release button, ensuring it is properly aligned.
3. Secure any screws or fasteners to hold the new component in place.

5. Reassemble and Test

Sub-steps:
1. Reattach the access panel and secure it with the appropriate fasteners.
2. Reconnect the 12V battery and power on the vehicle.
3. Test the trunk opening using the key fob, touchscreen, and manual release lever.

Tools Required:

Trim removal tool
Screwdriver set
Electrical tape
Multimeter (optional)

Parts Required:

Trunk latch assembly (if defective)
Trunk release button (if defective)
Wiring harness (if damaged)

Estimated Repair Time: 1-2 hours

Safety Warnings:

Disconnect the 12V battery before working on electrical components to prevent shocks or shorts.
Ensure the vehicle is in park and on a level surface before beginning repairs.