Introduction
Introduction
What
Why
Since the introductions of the D-Jetronic fuel injection
system in ModelYear (MY) 1968, the Motronic
ME7 torque-based system in MY 1999, and the
current Motronic MED17.5 dual gasoline/diesel
system, Volkswagen engine management systems
continue to evolve to meet the demands of changing
emissions and fuel economy standards.
Volkswagen is continually upgrading engine control
systems to meet the increasing demands for
increased performance and greater fuel economy, all
the while decreasing tailpipe emissions.
California emission standards have been traditionally
more stringent than the EPA requirements, but their
evolution and structure is similar to that of the federal
legislation. The California Air Resources Board (CARB)
first adopted Low Emission Vehicle (LEV) standards in
1990. These first LEV standards were in effect from
1994 through 2003.
This Self Study Program (SSP) discusses changes
and additions implemented since the April of 2000
publication of SSP 841003, Engine Management
Systems. Components that are unchanged from
previous engine management systems are listed with
the new system, but are not described in detail. If a
component is not described in this document, you
will be referred to a previous SSP that contains the
information.
LEV II regulations, adopted in November 1998, are
in effect from 2004 through 2010. LEV II affects
passenger cars, light-duty trucks (such as the
Touareg 2), and medium-duty vehicles.
A number of other states have adopted emission
standards equivalent to the California LEV II
legislation, including NewYork, Massachusetts,
Maine, and Vermont. Adoption of California standards
has been considered also by Connecticut, Rhode
Island, Pennsylvania, New Jersey, Oregon, and
Washington.
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