how to fix a key fob that won’t unlock my Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

15-30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

451 words

Problem Statement

Learn how to fix a key fob that won't unlock your Toyota Highlander (2014-2019). Step-by-step guide including symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be careful when using tools to avoid injury or damage to the key fob.

Symptoms

•Key fob buttons do not respond when pressed
•Vehicle does not unlock or lock remotely
•Warning light on the dashboard indicating a key fob issue
•Key fob battery is low or dead
•Physical key can unlock the door but electronic functions are unresponsive

Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear.
2
Check the battery voltage using a multimeter to determine if it is low.
3
Replace the battery in the key fob and test the function.
4
Verify if the vehicle's receiver is functioning by testing another key fob (if available).
5
Scan the vehicle’s system for any error codes related to the keyless entry system.

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

•Flat-head screwdriver
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear.
2
Check the battery voltage using a multimeter to determine if it is low.
3
Replace the battery in the key fob and test the function.
4
Verify if the vehicle's receiver is functioning by testing another key fob (if available).
5
Scan the vehicle’s system for any error codes related to the keyless entry system.

Solution

1. Preparing to Replace the Key Fob Battery

Gather necessary tools: flat-head screwdriver, replacement battery (CR2032), and a clean workspace.
Ensure the vehicle is in a safe, stationary position.

2. Open the Key Fob

Locate the seam of the key fob.
Use the flat-head screwdriver to gently pry open the key fob along the seam.
Be cautious to avoid damaging the plastic casing.

3. Replace the Battery

Remove the old battery from the key fob.
Note the orientation of the battery (positive side facing up).
Insert the new battery (CR2032) in the same orientation as the old one.

4. Reassemble the Key Fob

Align the two halves of the key fob.
Press them together firmly until they click into place.
Ensure there are no gaps between the two halves.

5. Test the Key Fob

Stand near the vehicle and press the unlock button on the key fob.
Confirm that the vehicle unlocks as expected.