Engine, A/T Controls - Harsh Downshifts/Jerking/Judder
SI B24 03 09Automatic Transmission
August 2011
Technical Service
This Service Information bulletin supersedes SI B24 03 09 dated December 2010.
NEW] designates changes to this revision.
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:
1. Intermittent harsh 4-3, 3-2 or 2-1 down shift (jolt) when coming to a stop with light brake application.
2. Jolts and/or jerks felt when reaccelerating after coasting.
3. Judder when gently accelerating (most noticeable at an engine speed below 2,000 RPM).
CAUSE
DME and EGS software calibration
[NEW] SOLUTION
Program the vehicle using the latest version of ISTA/P 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.
When the ISTA system message displays:
Battery voltage only "XX.XX" V. Please connect charger.
Please note the displayed battery voltage reading in the repair order comments section.
For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming".
[NEW] Warranty Information