A/T Controls - Code CDB4 Stored In DME

SI B24 21 07
Automatic Transmission

January 2009
Technical Service

This Service Information bulletin supersedes SI B24 21 07 dated October 2007.

[NEW] designates changes to this revision

SUBJECT
Diagnosis - DME Fault CDB4: No Message (transmission data 3, 3B1)

MODEL
E90, E91, E92, E93 with the GM6 - 6L45R transmission produced up to 3/30/2007

SITUATION
The fault code CDB4: no message (transmission data 3, 3B1) is stored in the DME. This fault cannot be cleared and does not cause any transmission problem, only the fault entry in the DME.

CAUSE
This EGS CAN message was no longer valid in EGS software from 4/2007 (Progman V25.0); however, the DME had learned and monitored this message previously. If the transmission is now reprogrammed with later software, the DME sets this fault because it still expects this CAN message to be sent.

CORRECTION
Clear the DME learned variants, using the test module found under the Service Function path:

Service Functions / Drive / Motor Electronics / Adjustment programs / Clear adaptive values

This brings up test module B1214_NG6AWZS - continue and follow the screen prompts.

[NEW] Select menu option (1) - Reset adaptation values and variants (coding).

The DME fault entry may now be cleared.

WARRANTY INFORMATION
Information only





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