EMISSION CONTROL SYSTEMS (2JZ–GE) SYSTEM PURPOSE The emission control systems are installed to reduce the amount of CO, HC and NOx exhausted from the engine ((3), (4) and (5)), to prevent the atmospheric release of blow–by gas–containing HC (1) and evaporated fuel containing HC being released from the fuel tank (2). The function of each system is shown in the following table. System | Abbreviation | Function (1) Positive Crankcase Ventilation | PCV | Reduces HC (2) Evaporative Emission Control | EVAP | Reduces evaporated HC (3) Exhaust Gas Recirculation | EGR | Reduces NOx (4) Three–Way Catalytic Converter | TWC | Reduces CO, HC and NOx (5) Sequential Multiport Fuel Injection* | SFI | Injects a precisely timed, optimum amount of fuel for reduced exhaust emissions Remark: * For inspection and repair of the SFI system, refer to the SFI section this manual. PREPARATION RECOMMENDED TOOLS 09082–00050 TOYOTA Electrical Tester Set • EQUIPMENT Tachometer Torque wrench Vacuum gauge