Engine Controls - MIL ON/Code 28AC Set

SI B 12 35 06
Engine Electrical Systems

October 2006
Technical Service

This Service Information bulletin supersedes S.M. B12 203 05 dated January 2005.

SUBJECT
MS45 - DME Fault Code 28AC

MODEL
E85 Z4 up to 10/2004 production

SITUATION
The "Service Engine Soon" light is illuminated and FC 28AC (Torque monitoring) is stored in the DME. Occasionally, the customer may complain of engine idle speed fluctuation on cold start. Appropriate DIS/GT1 test plan recommends replacement of DME.

CAUSE
DME software plausibility fault.

Incorrect DIS/GT1 diagnostic software.

PROCEDURE
In case of FC 28AC, DO NOT replace DME.

On a customer complaint basis only, reprogram the vehicle with Progman V13.0 or higher.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.

Defect Code Refer to KSD

Labor Operation: Refer to KSD
Labor Allowance: Refer to KSD





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