how to fix the key fob not working in 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

510 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

30-60 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle battery before working on the key fob or vehicle electrical systems to prevent shocks or shorts.

Symptoms

•Key fob buttons unresponsive
•Vehicle does not recognize key fob for starting
•Indicator light on key fob does not illuminate when pressed
•Doors do not lock or unlock when key fob is used
•Vehicle alarm may trigger unexpectedly

Diagnostic Steps

1
Check the battery in the key fob for proper voltage using a multimeter.
2
Replace the key fob battery if it is low or dead.
3
Inspect the key fob for physical damage or water ingress.
4
Reprogram the key fob if the battery replacement does not resolve the issue.
5
Check for any visible issues with the vehicle's keyless entry system components.

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
•Multimeter

Parts Required

•Replacement battery (CR2032)

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Diagnostic Steps

1
Check the battery in the key fob for proper voltage using a multimeter.
2
Replace the key fob battery if it is low or dead.
3
Inspect the key fob for physical damage or water ingress.
4
Reprogram the key fob if the battery replacement does not resolve the issue.
5
Check for any visible issues with the vehicle's keyless entry system components.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure a clean workspace to prevent loss of small components.
Disconnect the vehicle battery to avoid any electrical shorts while working.

2. Replace Key Fob Battery

Tools Required: Small flathead screwdriver, replacement battery (CR2032).
Sub-steps:
1. Use the flathead screwdriver to gently pry open the key fob casing.
2. Remove the old battery from its compartment.
3. Insert the new battery, ensuring the positive side is facing up.
4. Snap the key fob casing back together securely.

3. Reprogram Key Fob (if necessary)

Tools Required: None.
Sub-steps:
1. Sit in the driver's seat and close all doors.
2. Insert the key into the ignition and turn to the "ON" position without starting the engine, then turn back to "OFF."
3. Repeat the "ON" and "OFF" cycle five times, ending in the "ON" position.
4. The doors will lock and unlock automatically, indicating the vehicle is in programming mode.
5. Press any button on the key fob within 30 seconds. The doors will lock and unlock again to confirm programming.
6. Turn off the ignition to exit programming mode.

4. Test Key Fob Functionality

Sub-steps:
1. Reconnect the vehicle battery.
2. Test all functions of the key fob, including locking, unlocking, and starting the vehicle.