System Purpose - Toyota Land Cruiser 1988 Repair Manual

EC-2 EMISSION CONTROL SYSTEMS-
System Purpose
SYSTEM PURPOSE
System Abbreviation
Purpose
Positive crankcase ventilation PCV Reduced blow-by gas (HC)
Fuel evaporative emission control EVAP Reduced evaporative H C
Dash pot DP Reduces H C and CO
..
Exhaust gas recirculation EGR Reduces NOx
Air injection AI Reduces HC and CO
Three-way catalyst TWC Reduces HC, CO and NOx
Electronic fuel injection· EFI Regulates all engine conditions for reduction
of exhaust emissions.
• For inspection and repair of the EFI system, refer to the EFI section of this manual.