Pictorial Diagram is a simplified diagram which shows the various components of a system (motorcycle, car, ship, electronic devices, airplane, etc) without regard to their physical location, how the wiring is marked, or how the wiring is routed. It does, however, show you the sequence in which the components are connected.
Example of a Pictorial Diagram
The above picture shows the Honda CB100 pictorial diagram. It shows the motorcycle electrical system which consists of Generator, Selenium Rectifier, Battery, Fuse, Combination Switch, Ignition Coil, Breaker Points, Condenser and Lighting Switch.