ABS/TCS - Automatic Stability Control Operation Too Sensitive

SI B34 01 13
Brakes

January 2013
Technical Service

SUBJECT
ASC (Automatic Stability Control) Operation Too Sensitive

MODEL
F30 xDrive

SITUATION
ASC implausibility during normal driving can cause a flashing DSC warning lamp in the instrument cluster. This can occasionally deactivate the active cruise control function.

CAUSE
Software in the DSC module

CORRECTION
Run diagnostics using ISTA/D 2.34.0 or later and work through the corresponding test modules. The test modules can be found under the following path: Functional structure | 02 Chassis | Slip control system | [!] Current fault patterns | Cruise control switches off - implausible ASC control

Providing no faults are found (must be resolved first), update the software using ISTA/P 2.48.0 or a more recent version.

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. This documentation is not necessary when part of an approved Technical Service repair procedure; the battery charger is required to be attached before performing the Vehicle Test.








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