how to fix the key fob not working on my Toyota Highlander XU70 (2020-Present)?

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

525 words

Problem Statement

Learn how to fix a non-working key fob for your Toyota Highlander XU70 (2020-Present). Step-by-step guide for diagnosing and replacing the key fob battery.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be cautious when using tools to avoid damaging the key fob or injuring yourself.

Symptoms

•Key fob buttons do not respond
•Vehicle does not unlock or lock with key fob
•Key not detected warning on the dashboard
•Key fob's LED light does not illuminate when buttons are pressed
•Difficulty starting the vehicle with the fob present

Diagnostic Steps

1
Check the battery in the key fob for charge and proper installation.
2
Attempt to unlock the vehicle using the physical key blade (if applicable).
3
Verify if other key fobs (if available) work with the vehicle.
4
Inspect the key fob for physical damage or water exposure.
5
Scan the vehicle's OBD-II system for any related error codes.
6
Check for interference from other electronic devices or sources.

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
•CR2032 key fob battery
•Multimeter

Parts Required

•CR2032 key fob battery

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Diagnostic Steps

1
Check the battery in the key fob for charge and proper installation.
2
Attempt to unlock the vehicle using the physical key blade (if applicable).
3
Verify if other key fobs (if available) work with the vehicle.
4
Inspect the key fob for physical damage or water exposure.
5
Scan the vehicle's OBD-II system for any related error codes.
6
Check for interference from other electronic devices or sources.

Solution

1. Preparation

Gather tools: Small flathead screwdriver, CR2032 key fob battery, multimeter (optional).
Ensure the vehicle is in a safe, well-lit area.

2. Replace Key Fob Battery

Open the Key Fob:
- Use the small flathead screwdriver to carefully pry open the key fob. Insert the screwdriver in the seam and twist gently to separate the two halves.
Remove Old Battery:
- Take note of the battery orientation (positive and negative sides). Remove the old battery from its compartment.
Install New Battery:
- Insert the new CR2032 battery in the same orientation as the old battery. Ensure it is seated properly in the compartment.
Reassemble the Key Fob:
- Align the two halves of the key fob and press them together until they click into place.

3. Reprogram the Key Fob (if necessary)

Enter Programming Mode:
- Sit in the driver's seat with all doors closed. Insert the key into the ignition and turn it to the "ON" position (do not start the engine) and then back to "OFF" five times within 10 seconds.
Confirm Programming Mode:
- Once in programming mode, the locks should cycle to indicate readiness for programming.
Program Key Fob:
- Press any button on the key fob within 30 seconds. The locks should cycle again to confirm successful programming.
Exit Programming Mode:
- Turn the ignition key to "ON" and then back to "OFF" to exit programming mode.