ISTA-P "Correcton downshift behaviour"

[pat.stave]

Hi!

E61 530dA (M57TUD30 - ZF6HP21).

Can anyone tell me what the following function in ISTA-P does? I cannot find any reference to this in any documentation nor online.

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[SamE30e]

BMW will add conversions to ISTA/P sometimes for drive ability concerns. Chances are there is a downshifting issue in certain climates or scenarios that are rectified on a case to case basis with programming.

E90 N52 cars had a similar issue. If you're not experiencing a downshifting issue, don't bother.

[pat.stave]

Update: this is the related BMW SI. This is exactly the problem I am facing. However my car is not subject (2004 530D).

SI B 24 03 09
Automatic Transmission April 2009
Technical Service

SUBJECT
550i and 650i with N62TU and 6HP26 - Various Drivability Complaints


MODEL
E60, 550iA produced from 09/05 up to 02/07

E63, E64; 650i produced from 09/05 up to 09/07


SITUATION
The customer may complain about one or a combination of the following situations, listed below:

Intermittent harsh 4-3, 3-2 or 2-1 downshift (jolt) when coming to a stop with light brake application.

Jolts and/or jerks felt when reaccelerating after coasting.

Judder when gently accelerating (most noticeable at an engine speed below 2,000 RPM).

CAUSE
DME and EGS software calibration

SOLUTION
Program the vehicle with ISTA/P 2.33.0 or later, using the path "Conversion" and "Downshift behavior". After this modification, the k-word "HADS" will be added to the Vehicle Order.

Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.

For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming".

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty or the Certified Pre-Owned Program.

Defect Code:
24 00 33 98 00