1. Disconnect the negative battery terminal.
2. Locate the ECU. It is usually located under the hood, near the battery.
3. Remove the ECU from the vehicle.
4. Open the ECU case.
5. Use a soft, dry cloth to wipe away any dust or dirt from the inside of the ECU.
6. Use a cotton swab dipped in isopropyl alcohol to clean the electrical contacts on the ECU.
7. Let the ECU dry completely before reinstalling it.
8. Reconnect the negative battery terminal.
Cleaning the ECU can help to improve the performance of your vehicle and resolve any issues that may be caused by a dirty ECU.