TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
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EC/Emission Control Systems — System Purpose, page 2

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System Purpose — MK2 Supra Emission Control Systems, page 2
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Page text (OCR transcript)
SYSTEM PURPOSE

System | Abbreviation | Purpose
Positive crankcase ventilation | PCV | Reduces blow-by gas (HC)
Fuel evaporative emission control | EVAP | Reduces evaporative HC
Dash pot | DP | Reduces HC and CO
Exhaust gas recirculation | EGR | Reduces NOx
Three-way catalyst | TWC | Reduces HC, CO and NOx
Electronic fuel injection* | EFI | Regulates all engine conditions for reduction of exhaust emissions

Remarks *For inspection and repair of the EFI system, refer to EFI section.