my Toyota Highlander XU70 (2020-Present) remote key fob isn't working, how can I fix it?

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes to 1 hour

Time

easy

Difficulty

medium

Severity

3 min read

494 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for Toyota Highlander XU70 (2020-Present). Step-by-step guide with tools and tips included.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob components carefully to avoid damaging internal circuitry.

Symptoms

•Remote key fob does not respond when buttons are pressed
•Vehicle does not unlock or lock from a distance
•Warning light on the dashboard indicating key fob issue
•Inability to start the engine using the key fob
•Battery drainage in the key fob is suspected if other electronics are operational

Diagnostic Steps

1
Confirm that the key fob battery is not dead by testing it with another key fob if available.
2
Check for visible damage to the key fob casing or buttons.
3
Test the key fob range by attempting to unlock the doors from various distances.
4
Use an OBD-II scanner to check if there are any related error codes in the vehicle's computer.
5
Inspect the vehicle's receiver module for issues or loose connections.
6
Verify that other key fobs (if applicable) are functioning properly to rule out vehicle issues.

Solution

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 flat-head screwdriver
•CR2032 battery
•Multimeter

Parts Required

•CR2032 battery

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Symptoms

•Remote key fob does not respond when buttons are pressed

•Vehicle does not unlock or lock from a distance

•Warning light on the dashboard indicating key fob issue

•Inability to start the engine using the key fob

•Battery drainage in the key fob is suspected if other electronics are operational

Diagnostic Steps

1
Confirm that the key fob battery is not dead by testing it with another key fob if available.
2
Check for visible damage to the key fob casing or buttons.
3
Test the key fob range by attempting to unlock the doors from various distances.
4
Use an OBD-II scanner to check if there are any related error codes in the vehicle's computer.
5
Inspect the vehicle's receiver module for issues or loose connections.
6
Verify that other key fobs (if applicable) are functioning properly to rule out vehicle issues.

Solution

1. Preparation

Gather necessary tools, including a small flat-head screwdriver, a CR2032 battery (if replacement is needed), and a multimeter for testing.
Ensure you are working in a clean, well-lit area.

2. Open the Key Fob

Use the small flat-head screwdriver to gently pry open the key fob casing at the seam.
Take care not to damage the plastic clips holding the fob together.

3. Replace the Battery

Remove the old battery from the compartment, noting the orientation (positive side facing up).
Insert the new CR2032 battery in the same orientation.
Ensure the battery is seated properly in the compartment.

4. Reassemble the Key Fob

Align the two halves of the key fob casing and press them together until they click securely into place.
Double-check that there are no gaps in the casing.

5. Test the Key Fob

Stand within a reasonable distance of the vehicle and press the lock/unlock buttons to confirm functionality.
If the fob still does not work, refer to the vehicle’s manual for key fob reprogramming instructions.