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

522 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 the electrical systems to avoid shock or short circuits.

Symptoms

•Remote start button does not respond when pressed
•Engine does not start or crank at all
•Check engine light illuminated
•Security system indicator blinking excessively
•Remote key fob battery low warning

Diagnostic Steps

1
Check the remote key fob battery for adequate power.
2
Verify that the vehicle is in a condition that allows remote start (e.g., gear in 'Park,' doors closed).
3
Scan for error codes using an OBD-II scanner to detect any underlying issues.
4
Inspect the vehicle’s fuse box for any blown fuses related to the remote start system.
5
Test the remote start feature from a different distance to rule out range issues.
6
Check if the vehicle's security system is activated or malfunctioning.

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
•Screwdriver set
•Battery tester

Parts Required

•Key fob battery (usually CR2032)
•Replacement fuses (if applicable)

Related Faults

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Diagnostic Steps

1
Check the remote key fob battery for adequate power.
2
Verify that the vehicle is in a condition that allows remote start (e.g., gear in 'Park,' doors closed).
3
Scan for error codes using an OBD-II scanner to detect any underlying issues.
4
Inspect the vehicle’s fuse box for any blown fuses related to the remote start system.
5
Test the remote start feature from a different distance to rule out range issues.
6
Check if the vehicle's security system is activated or malfunctioning.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety during repairs.
Tools required:
- OBD-II scanner
- Multimeter
- Screwdriver set
- Battery tester

2. Check and Replace Key Fob Battery

Open the key fob using a small screwdriver.
Remove the old battery and check its voltage with a multimeter.
If the battery is low or dead, replace it with a new battery of the same type (usually CR2032).
Reassemble the key fob and test the remote start feature.

3. Inspect Fuses

Locate the vehicle’s fuse box (typically under the dashboard or in the engine compartment).
Use the fuse diagram to identify fuses related to the remote start system.
Remove and inspect each relevant fuse, replacing any that are blown with a fuse of the same amperage.

4. Reset the Vehicle’s Security System

Reconnect the vehicle battery.
Use the key fob to lock and unlock the doors to reset the security system.
Attempt to use the remote start feature again.

5. Reprogram Remote Start System (if necessary)

If the previous steps do not resolve the issue, reprogram the remote start system according to the manufacturer’s instructions (refer to the owner's manual).
This may involve using the ignition key and following a specific sequence to pair the remote again.