Maintenance Service Devices (MSD) are used for which purpose?

• A. Tools used for diagnosing vehicle issues
• B. Parts used to fix mechanical wear
• C. Devices for measuring engine timing
• D. Pumps used for fuel delivery

Answer: (A)

Maintenance Service Devices are diagnostic tools that technicians use to identify problems in a vehicle. They connect to the vehicle’s computer system, retrieve diagnostic trouble codes, view real-time sensor data, and guide repair steps. This makes them intended for diagnosing issues rather than supplying parts, measuring engine timing as a primary function, or delivering fuel.