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

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

518 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in 'Park' and the engine is off while performing repairs.

Symptoms

•Key fob buttons unresponsive
•Vehicle does not respond to key fob proximity
•Warning light illuminated on the dashboard
•Difficulty starting the vehicle
•Remote start feature not working

Diagnostic Steps

1
Check the battery in the key fob for any signs of corrosion or depletion.
2
Replace the key fob battery with a new one to see if functionality is restored.
3
Attempt to reprogram the key fob by following the owner's manual instructions.
4
Inspect the key fob for physical damage or water exposure.
5
Use a spare key fob to determine if the issue is with the fob itself or the vehicle's receiver.

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
•New key fob battery (CR2032 or as specified in manual)

Parts Required

•Key fob battery (CR2032 or as specified)

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Diagnostic Steps

1
Check the battery in the key fob for any signs of corrosion or depletion.
2
Replace the key fob battery with a new one to see if functionality is restored.
3
Attempt to reprogram the key fob by following the owner's manual instructions.
4
Inspect the key fob for physical damage or water exposure.
5
Use a spare key fob to determine if the issue is with the fob itself or the vehicle's receiver.

Solution

1. Preparation

Gather necessary tools: small flathead screwdriver, new key fob battery (CR2032 or as specified in manual).
Ensure the vehicle is in a safe location and that you have access to the owner's manual.

2. Replace Key Fob Battery

Open the Key Fob:
- Use the small flathead screwdriver to gently pry open the key fob casing along the seam.
- Be cautious to avoid damaging the plastic clips.
Remove Old Battery:
- Take note of the battery orientation (positive and negative sides).
- Carefully remove the old battery from its compartment.
Install New Battery:
- Insert the new battery in the same orientation as the old battery.
- Ensure it is seated properly in the compartment.
Reassemble Key Fob:
- Align the two halves of the key fob and press them together until you hear a click.
- Ensure there are no gaps along the seam indicating it is not fully closed.

3. Reprogram Key Fob (if necessary)

Enter Programming Mode:
- Insert the key into the ignition and turn it to the "On" position without starting the engine.
- Turn the key back to "Off" and remove it.
Program the Key Fob:
- Press and hold the "Lock" button on the key fob.
- While holding the "Lock" button, insert the key back into the ignition and turn it to "On" again.
- Release the "Lock" button after a few seconds; the key fob should be programmed.