why does my Toyota Highlander XU70 (2020-Present) key fob not work

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

490 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for the 2020-present Toyota Highlander XU70. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob components carefully to avoid damage.

Symptoms

•Key fob buttons unresponsive
•Unable to unlock or lock the doors remotely
•Security light on the dashboard may illuminate
•Engine may not start or crank
•No sound or indication when pressing the fob buttons

Diagnostic Steps

1
Verify battery condition of the key fob using a multimeter.
2
Replace the battery in the key fob and test functionality.
3
Check for physical damage or wear on the key fob.
4
Inspect the vehicle’s key fob receiver for any issues.
5
Use an OBD-II scanner to check for any related error codes.

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
•Phillips screwdriver
•Multimeter

Parts Required

•CR2032 battery

Related Faults

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Solution

1. Preparation

Gather necessary tools and parts.
Tools Required:
- Small flathead screwdriver
- Phillips screwdriver
- Multimeter
Parts Required:
- CR2032 battery (or appropriate battery for your key fob)

2. Replace Key Fob Battery

Open the Key Fob:
- Use a small flathead screwdriver to gently pry open the key fob casing at the notch.
- Be careful not to damage the casing.
Remove Old Battery:
- Take note of the battery orientation before removing it.
- Use the screwdriver to carefully lift out the old battery.
Insert New Battery:
- Place the new battery (CR2032) into the compartment, ensuring it is oriented the same way as the old battery.
Reassemble Key Fob:
- Press the two halves of the key fob back together until they click securely.

3. Test Key Fob Functionality

Stand near the vehicle and press the lock/unlock buttons to check for response.
If the vehicle responds, the issue was likely the battery.

4. Reprogram Key Fob (If Necessary)

Enter Programming Mode:
- Insert the key into the ignition and turn it to the "On" position without starting the engine.
- Ensure all doors are closed.
Press the Lock Button:
- On the key fob, press the lock button once to program it to the vehicle.
- Turn the ignition off and remove the key.
Test Functionality Again:
- Try to lock/unlock the doors using the key fob.