how to troubleshoot my key fob not working with Toyota Highlander XU70 (2020-Present)

Toyota Highlander XU70 (2020-Present)

Error Codes

30-60 minutes

Time

medium

Difficulty

medium

Severity

3 min read

489 words

Problem Statement

Learn how to troubleshoot and fix a non-working key fob for the 2020-Present Toyota Highlander XU70. Step-by-step guide with diagnostic and repair instructions.

Affected Component

Electrical

Estimated Time

30-60 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in 'Park' before performing any key fob programming or replacement.

Symptoms

•Key fob not responding when buttons are pressed
•Vehicle does not unlock or lock with the key fob
•Warning message on the dashboard indicating a key fob issue
•Key fob LED light not illuminating when buttons are pressed
•Difficulty starting the vehicle with the key fob inside

Diagnostic Steps

1
Check the key fob battery level by opening the fob and inspecting the battery.
2
Test the key fob functionality using a spare key fob, if available.
3
Inspect the vehicle's door locks and ignition system for any issues.
4
Scan the vehicle using an OBD-II scanner for any related error codes.
5
Reset the key fob by performing a battery disconnection or reprogramming procedure.
6
Verify the key fob signal with a multimeter or key fob tester, if available.

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 screwdriver
•Replacement battery (CR2032)
•OBD-II scanner

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the key fob battery level by opening the fob and inspecting the battery.
2
Test the key fob functionality using a spare key fob, if available.
3
Inspect the vehicle's door locks and ignition system for any issues.
4
Scan the vehicle using an OBD-II scanner for any related error codes.
5
Reset the key fob by performing a battery disconnection or reprogramming procedure.
6
Verify the key fob signal with a multimeter or key fob tester, if available.

Solution

1. Preparation

Tools Required: Small screwdriver, replacement battery (CR2032), OBD-II scanner (if necessary).
Ensure the vehicle is in a safe location and turn off the ignition.

2. Replace Key Fob Battery

Open the key fob using a small screwdriver or a flat tool, carefully prying apart the two halves.
Remove the old battery, noting the orientation (+/-).
Insert a new CR2032 battery in the same orientation.
Snap the key fob halves back together securely.

3. Reprogram Key Fob (if necessary)

Sit in the driver's seat with all doors closed.
Insert the key into the ignition and turn it to the "ON" position, then back to "OFF" five times within ten seconds.
Leave the key in the "ON" position on the fifth turn to enter programming mode.
Press any button on the key fob to register it with the vehicle.
Turn the ignition back to the "OFF" position to exit programming mode.

4. Test Key Fob Functionality

Stand outside the vehicle and press the lock/unlock buttons on the key fob.
Verify if the vehicle responds appropriately by locking or unlocking.