my Toyota Highlander Third Generation (2014-2019) key fob not working what should I do

Toyota Highlander Third Generation (2014-2019)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

473 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in the 'OFF' position while replacing the key fob battery to prevent accidental starting.

Symptoms

•Key fob buttons do not respond when pressed
•Vehicle does not unlock or lock remotely
•Engine does not start or is unresponsive to key fob
•Indicator light on the key fob does not illuminate
•Battery warning light may illuminate on the dashboard

Diagnostic Steps

1
Check the key fob battery by opening the fob and inspecting or replacing it.
2
Test the key fob functionality using a spare key fob, if available.
3
Scan the vehicle's OBD-II system for any related error codes.
4
Inspect the vehicle's door and ignition lock sensors for faults.
5
Ensure that the vehicle's battery is fully charged and in good condition.

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 (optional)

Parts Required

•CR2032 key fob battery

Related Faults

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Diagnostic Steps

1
Check the key fob battery by opening the fob and inspecting or replacing it.
2
Test the key fob functionality using a spare key fob, if available.
3
Scan the vehicle's OBD-II system for any related error codes.
4
Inspect the vehicle's door and ignition lock sensors for faults.
5
Ensure that the vehicle's battery is fully charged and in good condition.

Solution

1. Preparation

Gather tools: small flathead screwdriver, new key fob battery (CR2032), multimeter (optional).
Ensure the vehicle is in a well-lit area and that you have access to the spare key fob if necessary.

2. Replace Key Fob Battery

Step 1: Open the key fob by inserting a small flathead screwdriver in the seam and gently prying it apart.
Step 2: Remove the old battery, noting the orientation of the positive (+) and negative (-) sides.
Step 3: Insert the new CR2032 battery in the same orientation as the old battery.
Step 4: Push the two halves of the key fob back together until they click securely.

3. Reprogram Key Fob (if necessary)

Step 1: Sit inside the vehicle with all doors closed.
Step 2: Insert the key into the ignition and turn it to the "ON" position, then back to "OFF" five times within 10 seconds.
Step 3: The doors should lock and unlock automatically, indicating the vehicle is in programming mode.
Step 4: Press any button on the key fob to program it. The locks will cycle to confirm successful programming.
Step 5: Turn the ignition to "ON" to exit programming mode.