Tank Ventilation
The Evaporative Emission (EVAP) system (ELCD) takes charge of gasoline vapor from the fuel tank via a purge control valve which regulates the vapor entering the engine intake manifold. When the ECM senses that the engine is capable of burning this extra fuel, it weakens the mixture via the injectors and enriches it via the EVAP system.
The TRIONIC system satisfies the emission control requirements of OBD I (On Board Diagnostics) and has sufficient memory capacity for extensive workshop diagnosis.