How do I troubleshoot the remote start feature that isn’t working on my 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

585 words

Problem Statement

Learn how to troubleshoot and fix the remote start feature on your 2020 Toyota Highlander with step-by-step diagnostic and repair instructions.

Affected Component

Remote Start System

Estimated Time

1-2 hours

Symptoms

•The remote start feature does not activate when pressing the key fob button.
•The vehicle does not respond to the remote start command.
•The key fob functions normally for locking/unlocking doors but not for remote starting.

Diagnostic Steps

1
Verify Key Fob Functionality
2
Check Vehicle Settings
3
Examine Security System
4
Inspect Vehicle Conditions

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

•Phillips screwdriver
•Multimeter
•OBD-II scanner

Related Faults

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Troubleshooting Remote Start Feature on 2020 Toyota Highlander

Step 1: Verify Key Fob Functionality

Check Battery in Key Fob:
- Use a small Phillips screwdriver to open the key fob.
- Examine the battery (typically a CR2032) for corrosion or signs of wear.
- Replace the battery if needed.
Test Key Fob:
- Stand close to your vehicle and press the lock button on the fob to confirm it locks/unlocks the doors.
- If it does not work, consider reprogramming or replacing the key fob.

Step 2: Check Vehicle Settings

Vehicle Settings:
- Ensure that the remote start feature is enabled in the vehicle settings.
- Start the vehicle and navigate through the infotainment system settings to locate the "Remote Start" option.
Check for Safety Features:
- Verify if the vehicle is in Park (P). Remote start won’t work if it’s in any other gear.
- Ensure doors, hood, and trunk are closed, as the system will disable remote start if any of these are open.

Step 3: Examine Security System

Check for Security System Interference:
- If the vehicle has an aftermarket security system, it may interfere with the remote start.
- Temporarily disable the aftermarket system or consult its manual for compatibility with remote start.

Step 4: Inspect Vehicle Conditions

Engine Status:
- Check if there are any engine warnings or alerts displayed on the dashboard.
- If the check engine light is on, diagnose and resolve the underlying engine issue.
Inspect Fuel and Battery:
- Ensure the vehicle has enough fuel. Remote start may not activate if fuel is critically low.
- Check the battery voltage with a multimeter; it should be above 12.4 volts.

Tools Required

Phillips screwdriver (for key fob battery replacement)
Multimeter (for checking battery voltage)
OBD-II scanner (for checking error codes)

Repair Instructions

Step 1: Replace Key Fob Battery

Open the key fob using the Phillips screwdriver.
Remove the old battery and insert a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob and test its functionality.

Step 2: Enable Remote Start Feature

Start the vehicle and access the infotainment system.
Navigate to Settings > Vehicle > Remote Start.
Ensure the feature is enabled. If not, toggle it to the "On" position.

Step 3: Resolve Security Interference

If an aftermarket system is present, consult its documentation or contact the installer for compatibility issues.
Temporarily disable it and test the remote start function again.

Step 4: Address Engine or Battery Issues

Use an OBD-II scanner to check for trouble codes.
Address any engine faults indicated and clear the codes.
If the vehicle battery is low, jump-start or replace it if necessary.

Final Testing

After completing all checks and repairs, test the remote start feature by pressing the remote start button on the key fob.
The vehicle should start after a few seconds if all conditions are met.

If the remote start feature still does not work after following these steps, consider taking the vehicle to a Toyota dealership or a qualified automotive technician for further diagnostic evaluation and repair.