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

Toyota Highlander Third Generation (2014-2019)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

544 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is turned off and parked safely while working on the key fob.

Symptoms

•Key fob buttons unresponsive
•Reduced range for keyless entry
•Warning light on dashboard indicating a key fob issue
•Inability to start the engine using the key fob
•Physical damage or cracks in the key fob casing

Diagnostic Steps

1
Check the battery status of the key fob by replacing it with a new battery.
2
Inspect the key fob for physical damage or wear.
3
Verify if the vehicle recognizes the key fob by attempting to start the engine while holding the fob close to the start button.
4
Scan the vehicle’s onboard computer for any error codes related to the key fob or security system.
5
Test the key fob with another known working fob to determine if the issue is with the fob 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
•Replacement battery (CR2032)
•Multimeter

Parts Required

•Replacement battery (CR2032)

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Diagnostic Steps

1
Check the battery status of the key fob by replacing it with a new battery.
2
Inspect the key fob for physical damage or wear.
3
Verify if the vehicle recognizes the key fob by attempting to start the engine while holding the fob close to the start button.
4
Scan the vehicle’s onboard computer for any error codes related to the key fob or security system.
5
Test the key fob with another known working fob to determine if the issue is with the fob or the vehicle's receiver.

Solution

1. Preparation

Gather necessary tools: small flathead screwdriver, replacement battery (CR2032), and possibly a multimeter.
Ensure the vehicle is parked in a safe area with the engine off.

2. Replace Key Fob Battery

Open the Key Fob:
- Using a small flathead screwdriver, gently pry open the key fob casing at the seam.
- Take care not to damage the plastic casing.
Remove Old Battery:
- Note the orientation of the old battery (positive side facing up or down).
- Remove the old battery and dispose of it properly.
Install New Battery:
- Insert the new battery (CR2032) in the same orientation as the old one.
- Ensure it fits snugly in the battery compartment.
Reassemble the Key Fob:
- Carefully snap the two halves of the key fob back together until they click.
- Confirm that there are no gaps between the two halves.

3. Reprogram Key Fob (if necessary)

Enter Programming Mode:
- Enter the vehicle and close all doors.
- Insert the key into the ignition and turn it to the "ON" position (do not start the engine) and then back to "OFF" five times within 10 seconds.
Program the Key Fob:
- Press and hold the "LOCK" button on the key fob for 5 seconds.
- Turn the ignition back to "ON" and then to "OFF" to exit programming mode.
Test Key Fob Functionality:
- Attempt to lock and unlock the doors using the key fob.
- Check if the engine starts with the key fob.