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

Toyota Highlander Third Generation (2014-2019)

Error Codes

30-60 minutes

Time

medium

Difficulty

medium

Severity

3 min read

480 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for your 2014-2019 Toyota Highlander. Step-by-step guide with symptoms, diagnostics, and solutions.

Affected Component

Electrical

Estimated Time

30-60 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to avoid short circuits.

Symptoms

•Key fob buttons unresponsive
•Security indicator light blinking continuously
•Vehicle not starting with key fob present
•Physical key not functioning in door locks
•Battery warning light on dashboard (if applicable)

Diagnostic Steps

1
Check the key fob battery level using a multimeter.
2
Inspect the key fob for physical damage or corrosion.
3
Attempt to reprogram the key fob using the vehicle's onboard programming procedure.
4
Verify that the vehicle’s battery is fully charged.
5
Use a spare key fob (if available) to determine if the issue is with the fob or 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

•Flathead screwdriver
•Small Phillips screwdriver
•Multimeter
•Key fob battery (CR2032)

Parts Required

•Key fob battery (CR2032)

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Diagnostic Steps

1
Check the key fob battery level using a multimeter.
2
Inspect the key fob for physical damage or corrosion.
3
Attempt to reprogram the key fob using the vehicle's onboard programming procedure.
4
Verify that the vehicle’s battery is fully charged.
5
Use a spare key fob (if available) to determine if the issue is with the fob or the vehicle.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to prevent electrical issues.
Ensure that you have the replacement battery (if needed).

Tools Required:

Flathead screwdriver
Small Phillips screwdriver
Multimeter
Key fob battery (CR2032)

2. Replace the Key Fob Battery

Open the Key Fob
- Use the flathead screwdriver to carefully pry open the key fob casing.
Remove the Old Battery
- Take out the old battery and note the orientation (positive side facing up).
Insert the New Battery
- Place the new CR2032 battery in the same orientation as the old one.
Reassemble the Key Fob
- Snap the fob casing back together until it clicks securely.

3. Reprogram the Key Fob

Enter Programming Mode
- Sit in the driver's seat and close all doors.
- Insert the key into the ignition and turn it to the "ON" position, then back to "OFF."
- Repeat this step twice more (3 times total) to enter programming mode.
Program the Key Fob
- Press any button on the key fob within 30 seconds to program it. The locks should cycle to confirm successful programming.
Exit Programming Mode
- Turn the key to the "OFF" position and remove it from the ignition.