how to fix the remote key fob not working for my Toyota Highlander XU70 (2020-Present)

Toyota Highlander XU70 (2020-Present)

Error Codes

30-60 minutes

Time

medium

Difficulty

medium

Severity

3 min read

515 words

Problem Statement

Learn how to diagnose and fix a non-working remote key fob for your 2020-present Toyota Highlander XU70. Step-by-step guide with tools and tips.

Affected Component

Electrical

Estimated Time

30-60 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the vehicle battery before performing any electrical work to prevent short circuits.

Symptoms

•Key fob not responding to button presses
•Dashboard light indicating key fob battery low or dead
•Inability to unlock or lock doors remotely
•Vehicle not recognizing the key fob when inside
•Check engine light or other warning lights may activate intermittently

Diagnostic Steps

1
Test the key fob battery using a multimeter to check voltage levels.
2
Replace the key fob battery and try operating the fob again.
3
Check for physical damage on the key fob casing or buttons.
4
Verify that the vehicle's keyless entry system is functioning by testing with a spare key fob if available.
5
Use an OBD-II scanner to check for any related error codes in the vehicle's computer.
6
Inspect the vehicle's keyless entry antenna located near the front windshield.

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
•OBD-II scanner

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Test the key fob battery using a multimeter to check voltage levels.
2
Replace the key fob battery and try operating the fob again.
3
Check for physical damage on the key fob casing or buttons.
4
Verify that the vehicle's keyless entry system is functioning by testing with a spare key fob if available.
5
Use an OBD-II scanner to check for any related error codes in the vehicle's computer.
6
Inspect the vehicle's keyless entry antenna located near the front windshield.

Solution

1. Preparation

Gather tools and parts.
Ensure the vehicle is in a safe environment with the battery disconnected to prevent electrical issues.

2. Replace the Key Fob Battery

Open the Key Fob:
- Use a small flathead screwdriver to carefully pry open the key fob casing without damaging it.
Remove Old Battery:
- Take note of the battery orientation and remove the old battery.
Install New Battery:
- Insert a new CR2032 battery (or the specific battery required for your key fob) in the correct orientation.
Reassemble Key Fob:
- Snap the key fob casing back together until it clicks securely.

3. Reprogram the Key Fob (if necessary)

Enter Programming Mode:
- Sit in the driver's seat 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. Leave it in the "OFF" position on the fifth turn.
Press the Lock Button:
- Press the "Lock" button on the key fob within 30 seconds. The doors should lock and unlock to indicate the programming mode is successful.
Test the Key Fob:
- Exit programming mode by turning the ignition to "ON" again, and test the key fob functions.