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# EMISSION CONTROL SYSTEM (for Unleaded Gasoline Specification Vehicle) > SYSTEM DIAGRAM

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SECONDARY AIR INJECTION SYSTEM ILLUSTRATION

During a cold engine start, this system purifies the catalyst exhaust fumes by applying air pressure to the air hose, exhaust manifold and cylinder head exhaust port.

SECONDARY AIR INJECTION SYSTEM WIRING DIAGRAM

EMISSION CONTROL AND EVAP CONTROL SYSTEM ILLUSTRATION

To reduce HC emissions, the following occurs. First, evaporated fuel in the fuel tank is absorbed by the canister's active carbon. Then, when the vehicle is being driven, the fuel in the canister and air are routed into the intake manifold for combustion.

EMISSION CONTROL AND EVAP CONTROL WIRING DIAGRAM