The Audi 80-90 B3 (1986-1991) is an automotive diagnostic tool that provides a comprehensive overview of a vehicle's electrical systems. With this device, you can:

• Monitor various vehicle systems, including brake lights, headlights, turn signals, and fluid levels.
• Identify and troubleshoot electrical faults using the warning and danger display features.
• Test and diagnose various sensors and switches, such as coolant temperature, oil pressure, and brake fluid level.
• Verify the functionality of interior lights and exterior lights.
• Check the voltage supply and output signals of electrical components.