How to Start a Lexus After a Battery Change

How to Fix a Lexus GS300 That Won't Start After a Battery Change
If you've recently replaced the battery on your Lexus GS300 and the engine cranks but refuses to start, don't panic. This issue is likely due to the vehicle's security system being triggered. Fortunately, there's an easy fix that only takes about 7 minutes. Follow these simple steps to get your Lexus GS300 up and running again.

Why Won't Your Lexus GS300 Start?
After changing the battery, the security system in your Lexus GS300 might activate as a protective measure. This can prevent the engine from starting even though it turns over. The solution is straightforward and doesn't require any special tools.

How to Reset the Security System
Insert the Ignition Key: Place your key into the ignition and turn it two clicks to the "ON" position. You should see the ignition cycle through the following: Lock → ACC → ON → Start. Stop at the ON position, which is two clicks from the start.

Set a Timer for 7 Minutes: Once the key is in the ON position, start a countdown for 7 minutes. You can use your phone's timer for this step. During this time, the car's security system resets itself.

Turn the Ignition Off and On Again: After the 7-minute timer goes off, do not remove the key. Simply turn the key to the OFF position and then back to ON. Your Lexus GS300 should now start normally.

Why This Method Works
The Lexus GS300 has a security feature that activates when the battery is disconnected or replaced. This system prevents unauthorized starts by disabling the engine. By leaving the ignition on for 7 minutes, the security system resets itself, allowing the car to start.

Conclusion
If your Lexus GS300 won't start after a battery change, it's likely due to the security system being triggered. By following these simple steps—turning the ignition to the ON position, waiting 7 minutes, and then restarting—you can resolve the issue without needing a mechanic. This quick fix can save you time and money, getting you back on the road in no time.
Try this method and see if it works for you. If the problem persists, there may be other underlying issues, and professional assistance may be required.

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Try this method and see if it works for you. If the problem persists, there may be other underlying issues, and professional assistance may be required.