What are the common issues with the remote start feature in the 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

631 words

Problem Statement

Learn about common issues with the remote start feature in the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component

Remote Start System

Estimated Time

1-2 hours

Symptoms

•Remote Start Fails to Activate
•Engine Starts but Shuts Off Immediately
•Remote Start Works Intermittently
•Security Light Blinks

Diagnostic Steps

1
Check the Remote Key Fob
2
Verify Vehicle Conditions
3
Check for Diagnostic Trouble Codes (DTCs)
4
Inspect Vehicle Battery and Electrical System
5
Examine the Remote Start Module

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

•New battery (CR2032 or similar)
•Multimeter
•OBD-II scanner
•Small flathead screwdriver
•Wrench set
•Wire brush
•Soldering iron (if necessary)

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Solution

Common Issues with Remote Start Feature in the 2020 Toyota Highlander

The remote start feature in the 2020 Toyota Highlander can experience several issues. Below are common problems, their symptoms, diagnostic steps, tools required, and repair instructions.

Common Symptoms

Remote Start Fails to Activate
- The engine does not start when pressing the remote start button.
- No response from the vehicle's lights or horn.
Engine Starts but Shuts Off Immediately
- The vehicle starts for a few seconds and then turns off.
- Warning lights may illuminate briefly.
Remote Start Works Intermittently
- The remote start function works sometimes but fails at other times.
- Issues may vary based on environmental conditions.
Security Light Blinks
- The security indicator on the dashboard flashes when the remote start is attempted.

Repair Instructions

Replace Key Fob Battery
- Steps:
  1. Open the key fob using a small flathead screwdriver.
  2. Remove the old battery and install a new one.
  3. Reassemble the fob and test the remote start function.
- Tools Required: Small flathead screwdriver, new battery.
Adjust Vehicle Settings
- Steps:
  1. Ensure the vehicle is in “Park” and all doors are closed.
  2. Lock the doors and attempt the remote start again.
- Tools Required: None.
Clear DTCs and Test
- Steps:
  1. Use the OBD-II scanner to clear any DTCs found.
  2. Test the remote start function again to see if the issue persists.
- Tools Required: OBD-II scanner.
Inspect and Repair Battery Connections
- Steps:
  1. Disconnect the negative terminal of the battery.
  2. Clean any corrosion from the terminals.
  3. Reconnect and secure the terminals.
  4. Test the remote start function again.
- Tools Required: Wire brush, wrench set.
Check and Repair Remote Start Module
- Steps:
  1. Access the remote start module (usually located under the dash or behind panels).
  2. Inspect wiring and connectors for damage.
  3. Repair or replace any damaged components as necessary.
- Tools Required: Screwdriver, wiring diagram, soldering iron (if necessary).

Conclusion

Identifying and resolving remote start issues in a 2020 Toyota Highlander involves a systematic approach to diagnostics and repair. By following the steps outlined above, you can troubleshoot and potentially resolve the common problems associated with the remote start feature. If issues persist after conducting these checks, consider consulting a certified Toyota technician for further assistance.