how to fix my Toyota Highlander XU70 (2020-Present) remote start not working

Toyota Highlander XU70 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

490 words

Problem Statement

Learn how to diagnose and fix the remote start issue in your 2020 Toyota Highlander XU70. 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 systems to avoid shocks or shorts.
•Ensure the vehicle is in a safe location and cannot roll when performing repairs.

Symptoms

•Remote key fob not unlocking the vehicle
•No response when pressing the remote start button
•Dashboard lights do not illuminate when attempting remote start
•Engine fails to start or crank
•Possible check engine light illuminated

Diagnostic Steps

1
Check the battery in the remote key fob for proper voltage and replace if necessary.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, hood closed).
3
Scan the vehicle's computer system with an OBD-II scanner for any error codes.
4
Inspect the remote start system's fuses for any blown fuses.
5
Confirm that the vehicle's parking brake is engaged and that it is not in gear.

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

•OBD-II scanner
•Small flathead screwdriver
•Fuse puller (optional)

Parts Required

•Key fob battery (usually CR2032)
•Replacement fuses (if necessary)

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Diagnostic Steps

1
Check the battery in the remote key fob for proper voltage and replace if necessary.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, hood closed).
3
Scan the vehicle's computer system with an OBD-II scanner for any error codes.
4
Inspect the remote start system's fuses for any blown fuses.
5
Confirm that the vehicle's parking brake is engaged and that it is not in gear.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface with the engine off.
Disconnect the battery to prevent electrical shorts during repair.

2. Battery Replacement for Key Fob

Remove the back cover of the remote key fob using a small flathead screwdriver.
Take out the old battery and replace it with a new battery of the same type (usually CR2032).
Reassemble the remote fob and test the remote start function.

3. Inspect and Replace Fuses

Locate the fuse box, typically found under the dashboard or in the engine compartment.
Refer to the owner's manual for the specific location of the remote start fuse.
Visually inspect the fuse for any damage; replace with a fuse of the same amperage if blown.

4. Check Remote Start Settings

Access the vehicle's settings through the dashboard interface.
Navigate to the remote start settings and ensure that the feature is enabled.
If necessary, reset the system by following the vehicle's manual instructions for resetting remote start settings.

5. Reconnect Battery

Reconnect the battery terminals securely.
Ensure there are no loose connections or corrosion on the terminals.