how to fix my Toyota Highlander Third Generation (2014-2019) remote key fob not working

Toyota Highlander Third Generation (2014-2019)

Error Codes

30-60 minutes

Time

medium

Difficulty

medium

Severity

3 min read

464 words

Problem Statement

Learn how to fix the non-working key fob for your 2014-2019 Toyota Highlander. Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Electrical

Estimated Time

30-60 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is off while working on the key fob to avoid accidental engine start.

Symptoms

•Key fob buttons do not respond when pressed
•Vehicle does not unlock or lock remotely
•Red LED light on the key fob does not illuminate
•Possible intermittent response when close to the vehicle
•Battery replacement does not resolve the issue

Diagnostic Steps

1
Check the battery in the key fob to ensure it is installed correctly and is not dead.
2
Inspect the key fob for physical damage, including cracks or water exposure.
3
Attempt to reprogram the key fob using the vehicle’s manual instructions.
4
Scan the vehicle's onboard computer for any error codes related to the remote entry system.
5
Test the key fob range by standing at different distances from the vehicle.

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

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery in the key fob to ensure it is installed correctly and is not dead.
2
Inspect the key fob for physical damage, including cracks or water exposure.
3
Attempt to reprogram the key fob using the vehicle’s manual instructions.
4
Scan the vehicle's onboard computer for any error codes related to the remote entry system.
5
Test the key fob range by standing at different distances from the vehicle.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is in a safe location, parked with the engine off.
Wear safety gloves to protect your hands.

2. Replace the Key Fob Battery

Tools Required: Small flathead screwdriver, replacement battery (CR2032)
Use the small flathead screwdriver to gently pry open the key fob casing.
Remove the old battery and dispose of it properly.
Insert the new CR2032 battery, ensuring the positive (+) side is facing up.
Snap the key fob casing back together securely.

3. Reprogram the Key Fob

Tools Required: None
Sit inside the vehicle and close all doors.
Insert the key into the ignition and turn it from "OFF" to "RUN" (do not start the engine) five times within 10 seconds. The door locks should cycle to indicate the vehicle is in programming mode.
Press any button on the key fob within 30 seconds to program it. The locks should cycle again indicating the programming was successful.
Turn the ignition to "OFF" to exit programming mode.