my Toyota Highlander XU70 (2020-Present) remote keyless entry is not working what should I do

Toyota Highlander XU70 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

488 words

Problem Statement

Learn how to diagnose and fix keyless entry issues in your 2020-Present Toyota Highlander. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Remote key fob not responding when buttons are pressed
•Vehicle does not lock or unlock with the key fob
•Key fob LED light does not illuminate
•Possible intermittent functionality of the key fob
•No response from the vehicle when the key fob is within proximity

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Verify that the vehicle's battery is fully charged and functioning.
4
Scan the vehicle's OBD-II for any relevant error codes related to the keyless entry system.
5
Test the keyless entry system by attempting to operate from different distances and angles.
6
Check for any interference from other electronic devices or nearby vehicles.

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

•Multimeter
•Small screwdriver
•Socket set

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear.
3
Verify that the vehicle's battery is fully charged and functioning.
4
Scan the vehicle's OBD-II for any relevant error codes related to the keyless entry system.
5
Test the keyless entry system by attempting to operate from different distances and angles.
6
Check for any interference from other electronic devices or nearby vehicles.

Solution

1. Battery Replacement

Tools Required: Small screwdriver, new CR2032 battery
Instructions:
1. Use a small screwdriver to carefully open the key fob casing.
2. Remove the old battery and note the orientation (positive/negative).
3. Insert the new CR2032 battery in the same orientation.
4. Reassemble the key fob and ensure it clicks securely.

2. Reprogramming the Key Fob

Tools Required: None
Instructions:
1. Sit in the driver's seat with all doors closed.
2. Insert the key into the ignition and turn it to the "ON" position (do not start the engine).
3. Press and hold the "LOCK" button on the key fob for about 5 seconds.
4. Turn the ignition to "OFF" and then back to "ON" within 10 seconds.
5. Repeat the above step to complete the reprogramming process.

3. Inspect Keyless Entry Control Module

Tools Required: Socket set
Instructions:
1. Disconnect the vehicle’s battery to ensure safety.
2. Locate the keyless entry control module, usually found beneath the dashboard or behind the center console.
3. Check for loose connections or corrosion on the wiring harness.
4. Reconnect any loose wires and replace any corroded connectors.
5. Reconnect the battery and test the key fob functionality.