how to fix my Toyota Highlander XU70 (2020-Present) that won’t remote start?

Toyota Highlander XU70 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

520 words

Problem Statement

Learn how to diagnose and fix remote start issues in Toyota Highlander XU70 (2020-Present). 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 electronic systems.
•Ensure the vehicle is in park and on a flat surface before attempting remote start features.

Symptoms

•Remote start feature is unresponsive
•Key fob battery may be low or dead
•Check engine light may illuminate intermittently
•Vehicle does not start when attempting from a distance
•Security system indicator may flash or stay illuminated

Diagnostic Steps

1
Check the key fob battery level and replace if necessary.
2
Inspect the vehicle's security system to ensure it is not preventing remote start.
3
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
4
Verify that the vehicle is in a suitable environment for remote starting (e.g., doors closed, hood closed).
5
Check the remote start settings in the vehicle's infotainment system.
6
Test the remote start function with a known working key fob.

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
•Flathead screwdriver

Parts Required

•Key fob battery (CR2032 or as specified)

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Diagnostic Steps

1
Check the key fob battery level and replace if necessary.
2
Inspect the vehicle's security system to ensure it is not preventing remote start.
3
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs).
4
Verify that the vehicle is in a suitable environment for remote starting (e.g., doors closed, hood closed).
5
Check the remote start settings in the vehicle's infotainment system.
6
Test the remote start function with a known working key fob.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe and well-ventilated area.
Disconnect the battery to reset any electronic systems.

2. Inspect and Replace Key Fob Battery

Tools Required: Flathead screwdriver, new key fob battery (CR2032 or as specified).
Open the key fob using the flathead screwdriver.
Replace the old battery with the new one, ensuring correct polarity.
Snap the fob back together securely.

3. Check Vehicle's Security System

Inspect the vehicle's security system for any warning indicators.
Ensure that all doors, the trunk, and the hood are closed securely.
If an issue is found, reset the security system by following the manufacturer’s instructions.

4. Use OBD-II Scanner

Tools Required: OBD-II scanner.
Connect the scanner to the OBD-II port under the dashboard.
Retrieve any DTCs related to the starting system or security features.
Address any identified issues as indicated by the codes.

5. Verify Remote Start Settings

Access the vehicle's infotainment system.
Navigate to the settings for remote start and ensure the feature is enabled.
Follow the prompts to adjust any necessary settings.

6. Test Remote Start Functionality

Reconnect the battery.
Attempt to engage the remote start function using the key fob.
Confirm if the vehicle starts successfully from a distance.