how to fix the remote start 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

571 words

Problem Statement

Learn how to diagnose and fix the remote start issue in 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 shocks or shorts
•Ensure the vehicle is in 'Park' and the engine is off before attempting remote start diagnostics

Symptoms

•Remote start button does not respond when pressed
•Vehicle does not start or attempt to start remotely
•Check engine light illuminated on the dashboard
•Security system indicator light blinking or illuminated
•Remote key fob battery appears to be functioning

Diagnostic Steps

1
Check the battery in the remote key fob to ensure it has sufficient power
2
Verify that the vehicle is in a suitable environment for remote start
3
Scan the vehicle with an OBD-II scanner for any trouble codes related to the remote start system
4
Inspect the vehicle’s battery and electrical connections for any corrosion or loose connections
5
Confirm that the remote start feature is enabled in the vehicle’s settings
6
Test the remote start function from a closer proximity to eliminate range issues

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
•Multimeter
•Small flathead screwdriver

Parts Required

•Remote key fob battery (CR2032)

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Diagnostic Steps

1
Check the battery in the remote key fob to ensure it has sufficient power
2
Verify that the vehicle is in a suitable environment for remote start
3
Scan the vehicle with an OBD-II scanner for any trouble codes related to the remote start system
4
Inspect the vehicle’s battery and electrical connections for any corrosion or loose connections
5
Confirm that the remote start feature is enabled in the vehicle’s settings
6
Test the remote start function from a closer proximity to eliminate range issues

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe location and parked on a level surface.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Remote Key Fob Battery

Tools Required: Small flathead screwdriver, new battery (typically CR2032).
Steps:
1. Use the small flathead screwdriver to gently pry open the remote key fob.
2. Remove the old battery and replace it with the new battery, ensuring the positive side is aligned correctly.
3. Snap the fob back together securely.

3. Inspect Vehicle’s Battery and Connections

Tools Required: Multimeter.
Steps:
1. Reconnect the negative battery terminal.
2. Use the multimeter to check the vehicle’s battery voltage; it should read around 12.6 volts when fully charged.
3. Inspect the battery terminals and cables for tightness and corrosion; clean and tighten if necessary.

4. Check Remote Start Settings

Steps:
1. Start the vehicle using the key and access the settings menu on the dashboard display.
2. Navigate to the remote start settings and ensure it is enabled.
3. If necessary, consult the owner’s manual for specific instructions on accessing these settings.

5. Reprogram Remote Key Fob (if necessary)

Tools Required: None specific, but access to the vehicle’s manual may be required.
Steps:
1. Follow the manufacturer’s instructions to reprogram the remote key fob if the previous steps do not resolve the issue.
2. Typically involves a sequence of turning the ignition on and off and pressing buttons on the remote.