To find the ECM:
1. Open the hood of your vehicle.
2. Look on the passenger side of the engine compartment, near the firewall.
3. The ECM is usually a black or gray rectangular box with multiple connectors and wires. It may be covered by a protective shield.
Note: The specific location of the ECM may vary slightly depending on the year and model of the vehicle. It's best to consult your vehicle's owner's manual or a reliable online resource for accurate information.