Alarm System - DWA Causes Battery Discharge

SI B 65 18 06
October 2006

Sound Systems, Cruise, Alarms, Monitors
Technical Service

This Service Information bulletin supersedes S.M. B65 218 04 dated August 2004.

SUBJECT
DWA Causes Excessive Closed Circuit Current Draw

MODEL
E63, E64 (6 Series)

SITUATION
Vehicle occasionally fails to start due to a discharged battery. The complaint is sporadic.

CAUSE
After entering sleep mode correctly, the vehicle bus K CAN is intermittently woken again by the anti-theft alarm system (DWA).

PROCEDURE
In the event of a complaint, perform diagnostics with DIS/GT -1.

Use the "Energy Diagnosis" test plan to determine the type of off-load current problem. Continue troubleshooting if the DWA CAN SINE is determined to be the most likely cause.

Reprogram the vehicle using CIP 13.1, or later version. Refer to SI B09 05 01 (Coding, Individualization and Coding), Procedure B.





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