Engine - False CBS Oil Service Remaining Distance
SI B12 25 11Engine Electrical Systems
November 2011
Technical Service
SUBJECT
N55 - False CBS Oil Service Remaining Distance Forecast Is Displayed
MODEL
F07, F10 and F25 with the N55 engine produced to 8/31/2011
SITUATION
The CBS engine oil service forecast as displayed in the vehicle or by way of the BMW key reader indicates an incorrect or completely implausible value compared to what should be expected based upon the current mileage and time in service.
CAUSE
DME software error
CORRECTION
IMPORTANT REPAIR INFORMATION!
If an ISTA D version older than 2.27 is used to perform the normal Reset CBS Conditioned Based Service for engine oil, the fault (implausible remaining distance) may continue to occur.
If the CBS engine oil service reset is carried out directly via the instrument panel (without using the tester), the fault (implausible remaining distance) may continue to occur.
If the vehicle is programmed to integration level Fxxx-11-09-500 or a more recent version without performing the "Reset engine oil" service function with ISTA D 2.27, this also will not rectify the fault because the CBS data (including the implausible remaining distance) is not normally changed by vehicle programming.
Once the fault is rectified by performing the "Reset engine oil" Service function using ISTA D 2.27.0 (or a more recent version), the implausible forecast problem will no longer occur, and the forecast for future services will be calculated correctly.
Future CBS oil service reset can then be performed using either the ISTA D test plan or the instrument cluster function.
BMW MAINTENANCE PROGRAM INFORMATION
Situation A (CBS shows an engine oil service is required)
Invoice the Service-standard scope labor time, with performing the engine oil service, on the repair order under the applicable payment type: BMW Maintenance Program, customer pay or internal.
Situation B (CBS does not show an engine oil service is required) Refer to the Warranty Information section.
WARRANTY INFORMATION