my Toyota Highlander Third Generation (2014-2019) remote start feature is not working, what should I...

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

548 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, diagnostic steps, 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 avoid shocks.
•Ensure the vehicle is in a secure location while testing remote start functions.

Symptoms

•Remote start button does not respond when pressed
•No engine start or sound from the vehicle
•Dashboard lights do not illuminate when attempting remote start
•Key fob battery may be low or dead
•Check engine light illuminated (if applicable)
•Vehicle doesn't respond to other key fob functions (e.g., locking/unlocking)

Diagnostic Steps

1
Check the key fob battery for adequate charge and replace if necessary.
2
Verify the vehicle is in 'Park' and all doors are closed.
3
Ensure that the hood is fully closed and the hood switch is functioning.
4
Check for any error codes using an OBD-II scanner.
5
Inspect the remote start system fuse in the fuse box for continuity.
6
Test the key fob signal strength and range by attempting to start the vehicle from a closer distance.

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 Phillips screwdriver
•Fuse puller or needle-nose pliers

Parts Required

•Key fob battery (CR2032 or similar)
•Replacement fuse (if necessary)
•Hood switch (if defective)

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Symptoms

•Remote start button does not respond when pressed

•No engine start or sound from the vehicle

•Dashboard lights do not illuminate when attempting remote start

•Key fob battery may be low or dead

•Check engine light illuminated (if applicable)

•Vehicle doesn't respond to other key fob functions (e.g., locking/unlocking)

Diagnostic Steps

1
Check the key fob battery for adequate charge and replace if necessary.
2
Verify the vehicle is in 'Park' and all doors are closed.
3
Ensure that the hood is fully closed and the hood switch is functioning.
4
Check for any error codes using an OBD-II scanner.
5
Inspect the remote start system fuse in the fuse box for continuity.
6
Test the key fob signal strength and range by attempting to start the vehicle from a closer distance.

Solution

1. Preparation

Gather tools and necessary parts.
Ensure the vehicle is in a safe, well-ventilated area.
Disconnect the negative battery terminal to avoid electrical shocks.

2. Replace Key Fob Battery

Tools Required: Small Phillips screwdriver, new key fob battery (CR2032 or similar).
Open the key fob using a small screwdriver.
Remove the old battery and insert the new battery, ensuring correct polarity.
Reassemble the key fob and test the remote start function.

3. Inspect and Replace Fuse

Tools Required: Fuse puller or needle-nose pliers.
Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the fuse related to the remote start system (refer to the fuse diagram).
Pull the fuse and check for any signs of damage. Replace if necessary with the same amperage.

4. Verify Hood Switch

Tools Required: Multimeter.
Locate the hood switch, typically near the hood latch.
Disconnect the harness from the switch.
Use a multimeter to check for continuity when the switch is pressed. If defective, replace the switch.

5. Reconnect Battery and Test

Reconnect the negative battery terminal.
Test the remote start feature by attempting to start the vehicle from the key fob.