Computer/Controls - Idle May Fluctuate or Cut Off
SI B12 09 12Engine Electrical Systems
April 2013
Technical Service
This Service Information bulletin supersedes SI B12 09 12 dated November 2012.
[NEW] designates changes to this revision
SUBJECT
N55: Intermittent Loss of Power
MODEL
[NEW] N55 vehicles, only with Continental high-pressure pump and MEVD172 DME
[NEW] E70, E71 produced to 4/2012
[NEW] E82, E88 produced to 3/2012
[NEW] E90 produced to 5/2012
[NEW] E92, E93 produced to 3/2012
[NEW] F07, F10, F12, and F13 produced to 3/2012
[NEW] F25 produced to 4/2012
SITUATION
Intermittently, the engine idle speed may fluctuate up and down or cut off under any of the following circumstances, without any relevant faults stored in the DME memory:
^ While driving off throttle (coasting) and braking at speeds below approx. 10 mph
^ While idling, low-speed maneuvering such as parking, or if the steering is turned to the full-lock position
CAUSE
Unfavorable DME software
CORRECTION
Program the vehicle using the latest version of ISTA/P.
[NEW] Initial DME calibration improvements for this situation were introduced in 7/2012 and 11/2012.
[NEW] Further DME software improvements to completely rectify this complaint are now introduced with the March and April 2013 ISTA/P releases as noted below.
[NEW] For BN2000 vehicles program using ISTA/P 2.49.3 (release 4/26/2013) to the target integration
E70, E71:
[NEW] E070-13-03-504 or a more recent version
E82, E88, E90, E92, E93:
[NEW] E89x-13-03-504 or a more recent version
[NEW] For BN2020 vehicles program using ISTA/P 2.49.2 (release 3/29/2013) to the target integration
F07:
[NEW] F010-13-03-503 or a more recent version
[NEW] F10, F12, F13:
[NEW] F010-13-03-503 or a more recent version
F25:
[NEW] F025-13-03-503 or a more recent version
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.
Note:
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.
WARRANTY INFORMATION
Covered under the terms of the BMW New Car/SAV Limited Warranty or the BMW Certified Pre-Owned Program.
Specific eligible repairs may also be covered by the terms of the Federal, State or BMW Emissions Warranty.
To determine if any applicable Federal, State or BMW Emissions Warranty coverage applies prior to performing repairs, please see SI B01 02 11 for "Emissions Warranty Coverage" and refer to the "Glossary of Emission Coverage" attachment for more information.
The BMW Certified Pre-Owned Limited Warranty applies to BMW CPO vehicles that are still within the BMW Certified Pre-Owned Limited Warranty, but beyond Emissions Warranty coverage that applies.
Refer to KSD2 for the corresponding flat rate unit (FRU) allowance. Enter the Chassis Number, which consists of the last 7 digits of the Vehicle Identification Number (VIN). Click on the "Search" button" and then enter the applicable flat rate labor operation in the FR code field.
[NEW] If a control module was working properly and/or had no related faults stored prior to vehicle programming and it fails to program correctly or requires initialization, this additional work must be claimed with separate labor operations under the defect code listed above; refer to KSD2.