my Toyota Highlander XU70 (2020-Present) remote start not working what should I check

Toyota Highlander XU70 (2020-Present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

516 words

Problem Statement

Learn how to diagnose and fix remote start issues in the 2020-Present Toyota Highlander XU70. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on any electrical components to avoid short circuits.

Symptoms

•Remote start button does not respond when pressed
•No engine start or ignition sound
•Dashboard lights do not illuminate
•Security indicator light may flash or remain illuminated
•Potential issues with key fob functionality (e.g., range issues)

Diagnostic Steps

1
Check the battery status of the key fob to ensure it has sufficient charge.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, hood closed, vehicle not running).
3
Inspect for any warning lights on the dashboard that may indicate an issue (e.g., check engine light).
4
Test the key fob's range by attempting to start the vehicle from different distances.
5
Scan the vehicle’s OBD-II system for error codes that may indicate issues with the remote start system.
6
Check the vehicle’s settings to ensure remote start is enabled through the infotainment 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

•Flathead screwdriver
•OBD-II scanner

Parts Required

•Key fob battery (CR2032 or CR2025)

Related Faults

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Diagnostic Steps

1
Check the battery status of the key fob to ensure it has sufficient charge.
2
Verify that the vehicle is in a suitable condition for remote start (e.g., doors closed, hood closed, vehicle not running).
3
Inspect for any warning lights on the dashboard that may indicate an issue (e.g., check engine light).
4
Test the key fob's range by attempting to start the vehicle from different distances.
5
Scan the vehicle’s OBD-II system for error codes that may indicate issues with the remote start system.
6
Check the vehicle’s settings to ensure remote start is enabled through the infotainment system.

Solution

1. Key Fob Battery Replacement

Sub-steps:
1. Locate the small slot or indentation on the key fob.
2. Use a flathead screwdriver to carefully pry open the fob.
3. Remove the old battery (usually a CR2032 or CR2025).
4. Insert a new battery with the correct polarity (positive side facing up).
5. Snap the key fob back together securely.

2. Inspect Remote Start Conditions

Sub-steps:
1. Ensure all doors, hood, and trunk are completely closed.
2. Check that the vehicle is in park (automatic transmission) or neutral (manual transmission).
3. Confirm that the brake pedal is not depressed during the remote start attempt.

3. Reprogram Key Fob (if necessary)

Sub-steps:
1. Sit in the vehicle and close all doors.
2. Insert the key into the ignition and turn it to the "ON" position without starting the engine.
3. Press the lock button on the key fob for 1 second and then release it.
4. Turn the ignition off and then back to the "ON" position.
5. Repeat the above step to ensure successful reprogramming.

4. Resetting Remote Start System

Sub-steps:
1. Disconnect the vehicle's battery for 10-15 minutes.
2. Reconnect the battery ensuring proper polarity.
3. Attempt to use the remote start feature again.