How Do I Reset My Lexus After Replacing The Battery?

Lexus CT200h After Dark Tour
Lexus CT200h After Dark Tour from


Replacing the battery in your Lexus can sometimes lead to certain electrical systems malfunctioning or resetting. In order to ensure that everything is functioning properly after battery replacement, it is important to reset your Lexus. This article will guide you through the steps on how to reset your Lexus after replacing the battery.

Step 1: Prepare

Before you start the reset process, make sure that your Lexus is parked in a safe and flat area. Also, ensure that the ignition is turned off and that all the doors and windows are closed.

Step 2: Open the Hood

To access the battery, you will need to open the hood of your Lexus. Locate the hood release lever inside the car, usually located near the driver’s side footwell. Pull the lever to release the hood.

Step 3: Locate the Battery

Once the hood is open, locate the battery. In most Lexus models, the battery is located in the engine compartment on the driver’s side. It may be covered by a plastic panel, so you may need to remove it to access the battery.

Step 4: Disconnect the Negative Terminal

Using a wrench or a socket set, loosen the nut on the negative terminal clamp. Once loose, lift the clamp off the negative terminal and set it aside. Be careful not to let the negative terminal touch any metal parts of the car.

Step 5: Wait

After disconnecting the negative terminal, wait for approximately 15 minutes. This will allow any residual electricity in the system to dissipate. It is important to wait for this period to ensure a complete reset of the electrical systems.

Step 6: Reconnect the Negative Terminal

After the waiting period, reconnect the negative terminal by sliding the clamp back onto the negative terminal post. Tighten the nut securely to ensure a good connection.

Step 7: Turn on the Ignition

Turn on the ignition without starting the engine. Check if any warning lights or messages appear on the dashboard. If there are any, refer to your owner’s manual for instructions on how to resolve them.

Step 8: Perform a System Check

With the ignition still on, check if all the electrical systems are functioning properly. Test the lights, air conditioning, radio, power windows, and any other electrical components in your Lexus. If everything is working as expected, you have successfully reset your Lexus.

Step 9: Reset Radio and Navigation System

If your Lexus has a radio or navigation system that requires a security code, you may need to input the code to regain functionality. Refer to your owner’s manual or contact your Lexus dealer for assistance with resetting these systems.

Step 10: Test Drive

Take your Lexus for a short test drive to ensure that everything is working properly. Pay attention to any abnormal behavior or warning signs that may appear. If you notice any issues, consult a professional for further assistance.


Resetting your Lexus after replacing the battery is an essential step to ensure the proper functioning of the electrical systems. Following the steps outlined in this article will help you reset your Lexus with ease. Remember to refer to your owner’s manual or contact your Lexus dealer if you encounter any difficulties or have any specific questions related to your vehicle model.