Crankcase emission control system
The crankcase emission control system guides
the mixed gases within the crankcase ( such as
uncombusted fuel vapors, water vapor, and
exhaust) through a connected pipe into an
appropriate place in the air-intake pipe to
return them to the cylinders and be combusted
again. Thus, exhaust gas can be reduced while
also increasing the engine's fuel economy.
On-board diagnostic system
The engine malfunction warning light is part of
the vehicle's on-board diagnostic system.
The engine electronic control unit equipped
with the on-board diagnostic system stores
various fault information (especially when it
comes to exhaust-emissions fault information).
The fault information will be cleared if the
battery cables are disconnected, making a
rapid diagnosis difficult. Thus, please do not
disconnect the battery cables when investigating
why the engine malfunction warning light has
illuminated.
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