Spray 4-quart slow cooker with cooking spray. In 12-inch nonstick skillet, heat oil over medium-high heat. Cook turkey in oil 6 to 8 minutes, stirring often, until browned. In slow cooker, mix turkey, broth, salsa, onion, cumin, pepper, corn and chiles.
Cover; cook on Low heat setting 7 hours.
Stir 1 can of the beans into soup. Mash remaining can of beans; stir into soup. Cover; cook 1 hour longer or until thickened. Serve with sour cream.