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

Toyota Highlander XU70 (2020-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

512 words

Problem Statement

Learn how to diagnose and fix the remote start issue in your 2020-Present Toyota Highlander XU70. Step-by-step guide with tools and procedures.

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 shorts and shocks
•Ensure the vehicle is secure and cannot roll during repairs

Symptoms

•Remote start button does not respond when pressed
•Vehicle does not start or crank when using the remote start feature
•Check engine light illuminated on the dashboard
•Security system indicator flashing or lit
•Engine starts but shuts off after a few seconds when using remote start
•Key fob battery low warning displayed on the dashboard

Diagnostic Steps

1
Check the key fob battery and replace if low or dead
2
Ensure the vehicle is in park and all doors are closed properly
3
Scan for error codes using an OBD-II scanner to identify any issues
4
Inspect the remote start module and connections for any visible damage or loose wires
5
Verify the vehicle’s battery voltage; ensure it is above 12.5 volts
6
Check the security system status to ensure it is not preventing remote start operation

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
•Small flathead screwdriver
•Torque wrench
•Socket set

Parts Required

•CR2032 battery

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Remote start button does not respond when pressed

•Vehicle does not start or crank when using the remote start feature

•Check engine light illuminated on the dashboard

•Security system indicator flashing or lit

•Engine starts but shuts off after a few seconds when using remote start

•Key fob battery low warning displayed on the dashboard

Diagnostic Steps

1
Check the key fob battery and replace if low or dead
2
Ensure the vehicle is in park and all doors are closed properly
3
Scan for error codes using an OBD-II scanner to identify any issues
4
Inspect the remote start module and connections for any visible damage or loose wires
5
Verify the vehicle’s battery voltage; ensure it is above 12.5 volts
6
Check the security system status to ensure it is not preventing remote start operation

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the negative battery terminal to ensure safety while working.

2. Check and Replace Key Fob Battery

Tools Required: Small flathead screwdriver
Open the key fob using the flathead screwdriver.
Remove the old battery and replace it with a new CR2032 battery, ensuring correct polarity.
Reassemble the key fob and test the remote start function.

3. Inspect and Secure Connections

Tools Required: Torque wrench, socket set
Locate the remote start module, usually found near the engine compartment or under the dashboard.
Visually inspect all wiring and connections for damage or disconnections.
Tighten any loose connectors and replace any damaged wiring.
Reconnect the negative battery terminal.

4. Reset the Security System

Tools Required: OBD-II scanner
Using the OBD-II scanner, clear any stored error codes related to the security system.
Follow the scanner’s prompts to reset the vehicle’s security system settings.

5. Test Remote Start Functionality

Attempt to use the remote start feature with the key fob.
Ensure the vehicle is in park and all doors are closed before testing.