AEM 30-3510 Infinity Plug & Play Harnesses - BMW 2001-2006 E46 M3 - Manual (Page 9)

2001–2006 BMW E46 M3 9
© 2014 AEM Performance Electronics
When accelerator pedal is pressed, idle valve sends m ore airflow into
engine. Airflow increases w hen LS5_Duty is set to low values.
The ModeSelect_DBW table is
preconfigured to switch between
the two different
DBW_ThrottleCurve tables,
depending on the status of the
CAN_SPORTBUTTON signal. The
CAN_SPORTBUTTON toggles
between 0 and 1 (2 and 3 are not
used) when depressing the
SPORT button. States 0 and 1 are
mapped to the
DBW_ThrottleCurve1 and
DBW_ThrottleCurve2 tables
respectively. Both 2D tables use
accelerator pedal position for the
y-axis and RPM for the x-axis.
The values that are entered in the
table are throttle position targets.
Between 0-10% accelerator pedal position, the idle valve supplies all airflow to the engine while the
individual throttles remain fully closed. This behavior can be observed in the LS6_Duty table (which
increases airflow through the idle valve when the accelerator pedal is pressed) and the
DBW_ThrottleCurve tables. If tuners desire to adjust the DBW_ThrottleCurve tables, the lower two rows
must remain set to 0. Great care must be taken when adjusting the ThrottleCurve tables, poor choices
here can result in undesirable engine response or drive-by-wire tracking errors.
If it is desired to mimic the OEM BMW throttle control strategy, set the target to 75% throttle below 5500
RPM when the Accel Pedal is 100% open and 90% throttle above 5500 RPM. NOTE: Do not enter
values above 95% in the throttle curve tables; this will force the throttles against the
mechanical ‘full open’ stop which is not desirable and could cause failsafe actions to occur.
Tuning Tool Tip: Because the AEM base session files use TPS as the VE table y-axis, the throttle target
tables can be used as a tuning aid. Simply set the DBW_APP1 100% row to Throttle target values that
correspond to values which need attention in the VE tables. This enables each cell to be accessed
easily by the tuner on a dynamometer for example.
The factory BMW traction control and rev limiter is controlled using the DBW, whereas many other
applications use a fuel cut or, in some rare cases, an ignition cut or ignition retard. With the AEM
Infinity, these can be controlled by any or all of the aforementioned methods.
Note that there is also a
DBW Tuning section in the
Plug-in | Wizards | Setup
Wizard… However, most of
these channels will already
be set up properly in the
AEM base session file and
should not be changed.