Nissan Micra Engine & Emission Control Vacuum Diagram - Hose Routing (EF & EC-4)

This document is a factory service manual page titled 'Engine and Emission Control System Vacuum Diagram,' page EF & EC-4. It shows a schematic vacuum hose routing diagram for a carbureted engine, identifying the exhaust manifold, air injection pipe, air injection valve, distributor, E.G.R. control valve, thermal vacuum valve, T.O.C.S. (throttle opener control system) solenoid and control valve, carburetor, A.B. valve, throttle opener servo diaphragm, vacuum switch (for the 'save gas' warning lamp), charcoal canister, and connections to the air cleaner, intake manifold, and fuel tank. A legend at the bottom distinguishes five hose types by hatching pattern: ported vacuum (distributor), ported vacuum (E.G.R.), canister purge, manifold vacuum, and air. A reader can use this page to trace correct vacuum hose routing between emission-control components, determine which hoses carry ported versus manifold vacuum, and understand how the air injection, EGR, evaporative (canister purge), and throttle opener systems interconnect. The page itself carries no year, model, or engine designation, though it was uploaded as documentation for a 1990 Nissan Micra.