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

Toyota Highlander Third Generation (2014-2019)

Error Codes

30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

470 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob components carefully to avoid damage.

Symptoms

•Key fob buttons not responding
•Vehicle does not unlock or lock with key fob
•Engine does not start when fob is inside the vehicle
•Warning light on dashboard related to key fob or ignition
•Reduced range of key fob operation

Diagnostic Steps

1
Check the battery in the key fob for voltage using a multimeter.
2
Replace the battery in the key fob to see if it resolves the issue.
3
Inspect the key fob for physical damage or water exposure.
4
Test the key fob proximity sensor functionality with a spare key fob, if available.
5
Scan the vehicle's OBD-II 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

•Small flathead screwdriver
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery in the key fob for voltage using a multimeter.
2
Replace the battery in the key fob to see if it resolves the issue.
3
Inspect the key fob for physical damage or water exposure.
4
Test the key fob proximity sensor functionality with a spare key fob, if available.
5
Scan the vehicle's OBD-II for any error codes related to the keyless entry system.

Solution

1. Preparation

Tools Required: Small flathead screwdriver, new CR2032 battery (or as specified in the owner's manual).
Ensure the vehicle is parked in a safe location and the engine is off.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry apart the two halves of the key fob.
Carefully separate the halves without damaging the casing or internal components.

3. Replace the Battery

Remove the old battery from the key fob, noting the orientation of the battery.
Insert the new battery, ensuring it is placed in the same orientation as the old one (positive side facing up).
Press down gently to ensure a secure connection.

4. Reassemble the Key Fob

Align the two halves of the key fob and press them together until they snap back into place securely.
Check for any gaps indicating that the fob is not fully closed.

5. Test the Key Fob

Stand near the vehicle and attempt to lock and unlock the doors using the key fob.
If the vehicle starts, the issue is resolved. If not, further diagnostics may be required.