How can I fix a problem with the trunk release button in my Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

636 words

Problem Statement

Learn how to diagnose and repair the trunk release button on a Toyota Highlander, including symptoms, diagnostic steps, and required tools.

Affected Component

trunk release system

Estimated Time

1-2 hours

Symptoms

•Trunk does not open when pressing the button
•No sound or feedback
•Manual trunk release works

Diagnostic Steps

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

•Multimeter
•OBD-II scanner
•Fuse puller or needle-nose pliers
•Screwdrivers (Phillips and flat-head)
•Wire strippers/crimpers
•Replacement fuse
•Replacement battery for the key fob

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Back to Generation

Fixing the Trunk Release Button on a Toyota Highlander (Fourth Generation, 2020-present)

Tools Required

Multimeter
OBD-II scanner
Fuse puller or needle-nose pliers
Screwdrivers (Phillips and flat-head)
Wire strippers/crimpers (if wiring repair is needed)
Replacement fuse (if necessary)
Replacement battery for the key fob (if applicable)

Repair Instructions

Step 1: Replace Key Fob Battery

Open the Key Fob: Use a flat-head screwdriver to gently pry open the key fob casing.
Replace the Battery: Remove the old battery and insert a new CR2032 or appropriate battery, ensuring correct polarity.
Reassemble the Key Fob: Snap the casing back together securely.

Step 2: Replace the Trunk Release Fuse

Identify the Fuse: Refer to the owner’s manual for the correct fuse location.
Remove the Fuse: Use the fuse puller to remove the blown fuse.
Insert New Fuse: Insert a new fuse of the same amperage into the socket.
Test the Button: Check if the trunk release button functions properly now.

Step 3: Repair Wiring (if needed)

Access Wiring: If the wiring needs repair, access the trunk release button's wiring harness.
Inspect and Repair:
- Cut and strip the damaged wire using wire strippers.
- Twist the corresponding wires together and use a crimp connector to secure them, or solder them together and cover with electrical tape.
Reassemble: Ensure all connections are secure, and reassemble any panels removed.

Step 4: Reprogram Key Fob (if applicable)

Follow Reprogramming Instructions: Your owner’s manual will provide instructions on how to reprogram the key fob if it is not functioning after a battery replacement.
Test the System: After reprogramming, test the trunk release button to ensure functionality.

Step 5: Check Body Control Module (BCM) (if all else fails)

Scan for Codes: If the trunk release still does not work, connect the OBD-II scanner to check for BCM codes.
Diagnose and Repair: If codes indicate a BCM failure, further diagnostics may be required by a professional technician.

Conclusion

After following these steps, the trunk release button on your Toyota Highlander should be functional. If none of the above solutions work, it may be necessary to consult a professional technician or visit a Toyota dealership for further diagnostics.