how to fix the remote start not working on my Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

526 words

Problem Statement

Learn how to diagnose and fix the remote start issue in your 2014-2019 Toyota Highlander. Step-by-step guide with symptoms, diagnostics, and solutions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shock or short circuits.

Symptoms

•Remote start button on the key fob unresponsive
•No indication lights (e.g., no flashing lights or chirp sound)
•Engine does not start when attempting remote start
•Security light flashing on the dashboard
•Possible check engine light illuminated

Diagnostic Steps

1
Ensure the vehicle is in park and doors are closed before attempting remote start.
2
Check the battery charge of the key fob; replace if low.
3
Inspect the vehicle's battery for sufficient charge and connections.
4
Verify that the remote start system is properly programmed and paired with the vehicle.
5
Scan the vehicle's onboard diagnostics for any trouble codes related to the remote start or engine immobilizer system.
6
Check the fuses associated with the remote start system and replace any blown fuses.

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 flathead screwdriver
•Fuse puller

Parts Required

•Key fob battery (CR2032)
•Replacement fuses (if needed)

Related Faults

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Diagnostic Steps

1
Ensure the vehicle is in park and doors are closed before attempting remote start.
2
Check the battery charge of the key fob; replace if low.
3
Inspect the vehicle's battery for sufficient charge and connections.
4
Verify that the remote start system is properly programmed and paired with the vehicle.
5
Scan the vehicle's onboard diagnostics for any trouble codes related to the remote start or engine immobilizer system.
6
Check the fuses associated with the remote start system and replace any blown fuses.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety during repairs.

2. Key Fob Battery Replacement

Remove the key fob cover using a small flathead screwdriver.
Replace the old battery (typically a CR2032) with a new one, ensuring the positive side is facing up.
Reassemble the key fob cover securely.

3. Inspect Vehicle Battery and Connections

Open the hood and inspect the vehicle battery for corrosion or loose connections.
If corrosion is present, clean the terminals with a wire brush and reconnect securely.
Test the battery voltage with a multimeter; replace the battery if voltage is below 12.4 volts.

4. Check and Replace Fuses

Locate the fuse box (usually found under the dashboard or in the engine compartment).
Identify the fuse related to the remote start system (refer to the owner’s manual for the correct fuse location).
Remove the fuse using a fuse puller and inspect it. Replace with the same amperage fuse if blown.

5. Reprogram Remote Start System (if necessary)

Enter the vehicle with all keys and remotes.
Turn the ignition to the “On” position without starting the engine.
Follow the specific programming procedure for the remote start system as outlined in the owner's manual.
Test the remote start function after reprogramming.