why is my key fob not working for my Toyota Highlander XU70 (2020-Present)

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in park and turned off while working on the key fob.

Symptoms

•Key fob buttons unresponsive
•Vehicle does not respond to key fob signals
•Warning light on the dashboard indicating a key fob issue
•Inability to start the vehicle using the key fob
•Reduced range of key fob operation

Diagnostic Steps

1
Check the battery level of the key fob using a multimeter.
2
Inspect the key fob for physical damage or signs of wear.
3
Replace the battery in the key fob and test its functionality.
4
Scan the vehicle’s onboard diagnostics for any error codes related to the keyless entry system.
5
Test the operation of the car's door locks using the physical key blade as a backup.
6
Verify if the vehicle's keyless entry system is enabled in the vehicle settings.

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

Parts Required

•Key fob battery (typically CR2032 or similar, verify with vehicle manual)

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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 signs of wear.
3
Replace the battery in the key fob and test its functionality.
4
Scan the vehicle’s onboard diagnostics for any error codes related to the keyless entry system.
5
Test the operation of the car's door locks using the physical key blade as a backup.
6
Verify if the vehicle's keyless entry system is enabled in the vehicle settings.

Solution

1. Preparation

Gather necessary tools and materials: new key fob battery, small screwdriver, multimeter.
Ensure the vehicle is parked in a safe and well-lit area.

2. Replace the Key Fob Battery

Open the Key Fob:
- Use a small screwdriver to gently pry open the key fob casing.
- Be cautious not to damage the plastic clips.
Remove the Old Battery:
- Take note of the battery orientation (+/-).
- Carefully remove the old battery using a flat tool.
Insert the New Battery:
- Place the new battery in the same orientation as the old one.
- Ensure it fits snugly in the battery compartment.
Reassemble the Key Fob:
- Align the two halves of the key fob and press them together until they click into place.
- Check for any gaps to ensure it is sealed properly.

3. Test Key Fob Functionality

Test Lock/Unlock Functions:
- Stand near the vehicle and press the lock and unlock buttons to test functionality.
Test Start Function:
- If applicable, try to start the vehicle using the key fob.