how can I fix the remote start feature not working on my Toyota Highlander?

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

530 words

Problem Statement

Learn how to diagnose and fix the remote start feature not working on your Toyota Highlander. 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 prevent shorts.
•Handle batteries and electronic components with care.

Symptoms

•Remote start button unresponsive
•Vehicle does not start when remote start is attempted
•Check engine light illuminated
•Key fob battery indicator low or dead
•Other electronic features may also be malfunctioning
•Security system warning light active

Diagnostic Steps

1
Check the key fob battery for charge and replace it if necessary.
2
Verify that the vehicle is in 'park' and all doors are closed securely.
3
Scan the vehicle's OBD-II system for any error codes that may indicate issues with the engine or security system.
4
Inspect the vehicle's remote start settings in the owner's manual and ensure they are enabled.
5
Test the remote start feature using a different key fob if available.
6
Check for any blown fuses related to the remote start system.

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 or coin
•Fuse puller

Parts Required

•Key fob battery
•Replacement fuses (if necessary)

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Diagnostic Steps

1
Check the key fob battery for charge and replace it if necessary.
2
Verify that the vehicle is in 'park' and all doors are closed securely.
3
Scan the vehicle's OBD-II system for any error codes that may indicate issues with the engine or security system.
4
Inspect the vehicle's remote start settings in the owner's manual and ensure they are enabled.
5
Test the remote start feature using a different key fob if available.
6
Check for any blown fuses related to the remote start system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked in a safe area and has sufficient fuel.
Disconnect the vehicle battery to avoid electrical shorts while working.

2. Replace Key Fob Battery

Tools Required: Small flathead screwdriver or a coin.
Open the key fob casing using the screwdriver or coin to avoid damage.
Replace the old battery with a new one, ensuring proper polarity.
Reassemble the key fob and test the remote start function.

3. Check Remote Start Settings

Tools Required: Owner's manual.
Access the vehicle settings through the dashboard display.
Navigate to the remote start settings and ensure they are set to "enabled."
Adjust settings as needed and save changes.

4. Inspect and Replace Fuses

Tools Required: Fuse puller, replacement fuses (check owner's manual for specifications).
Locate the fuse box, usually under the dashboard or in the engine compartment.
Identify the fuse related to the remote start feature using the diagram on the fuse box cover.
Remove the fuse with the puller and inspect it for damage.
Replace with a new fuse of the same amperage if damaged.

5. Test the Remote Start Feature

Reconnect the vehicle battery.
Attempt to use the remote start feature again with the key fob.
Ensure that the vehicle starts successfully and operates normally.