1. The inspector asks you to exit your vehicle and wait inside the booth while your vehicle is tested.
2. The inspector performs a tampering inspection on your vehicle. They make sure your vehicle has both a gas cap and a catalytic converter (if it was manufactured with both). They also check for obvious fluid leaks, bald tires and other safety concerns that may prevent your vehicle from being tested.
3. The inspector enters the Vehicle Identification Number (VIN) into the computer so that the emissions standard for your vehicle can be pulled up and the vehicle identified.