That means that the fuel injection rate fault is learned in an adaptive characteristic map that is saved permanently in the DDE control module. The MMA is not a rapid control operation, rather an adaptive learning procedure.
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If there is a deviation, the air mass is adapted to the actual fuel injection rate by adjusting the exhaust gas recirculation valve in such a way that the correct lambda value is set. BMW Diagnostics with ISTA - How to test the lights (solar) sensor with ISTA D.The information contained on this video are for educational and informational p. This value is compared with the injection quantity specified by the DDE control module. The lambda value measured by the oxygen sensor and the air mass measured by the HFM are used to determine a mean fuel injection rate across all cylinders. This procedure does not affect the individual injectors. The quantity mean value adaptation is a learning procedure in which the fuel-air ratio (lambda value) is correctly adjusted by adapting the air mass or exhaust gas recirculation rate. The oxygen sensor is a wide-band sensor that provides exact lambda values over a wide measuring range.
This sensor is fitted after the turbine of the exhaust turbocharger. The saved compensation factors are reset to 0 in the process.Īn oxygen sensor is required for the quantity mean value adaptation function. The service function Mass air flow meter adaptation must be run if the mass air flow meter is replaced. These adaptation values enable the control module to adjust the measured levels before they are processed by the various functions. As the adaptation is carried out in two operating points, there are two adaptation values. If the DDE control module finds that the measured level differs by more than ± 8 % from the theoretical figure, that difference is saved on the control module as an adaptation value. The DDE control module compares the figure obtained with the level measured by the air mass flow meter. The air mass flow meter adaptation uses certain operational data to calculate the theoretical air mass flow passing through the engine.
In order to prevent the effects of this problem, the (Air mass flow meter adaptation) function has been introduced.Īir mass flow meter adaptation is performed by the DDE control module at two operating points: When idling and under load in an operating range defined as follows: Those effects cause divergence between the saved characteristic and the specified status resulting in symptoms such as lack of power or black smoke.
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ISTA/P is legacy now for E series cars.) Start new session in ISTA D/ ISTA+, perform the identification of vehicle and a test: open menu. After version 4, it was called ISTA+ and also has the ability to program F and G cars without ISTA/P.
One of the supported OBD adapters is required to use BimmerCode.In normal operation, the air mass flow meter is subject to effects such as soiling and aging. Steps to re-adapt BMW engine with BMW ISTA-D or ISTA+ software: ( Rheingold is the old name of ISTA/D. You can find a detailed list of the supported cars and options on
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Do you want to disable the Auto Start/Stop function or the Active Sound Design? You will be able to code this and much more by yourself with the BimmerCode app. BimmerCode allows you to code the control units in your BMW or Mini to unlock hidden features and customize your car to your liking.Īctivate the digital speed display in the instrument cluster or allow your passengers to watch videos while driving in the iDrive system.