Engine Controls - Battery Discharged by MPM

SI B 61 12 05
General Electrical Systems

November 2005
Technical Service

This Service Information bulletin supersedes S.M. B61 203 05 dated April 1, 2005.

SUBJECT
Dead Battery Caused By MPM

MODEL
E60/E61 (5 Series), E63/E64 (6 Series) produced up to September 2005

CAUSE
An accessory plugged into the cigar lighter / power supply causes a back- feed of voltage into the vehicle electrical system when the ignition is switched off. This causes the MPM (Micro Power Module) to stay awake, and the vehicle battery to discharge.

Energy diagnosis identifies the MPM as the "sleep mode preventer".

CORRECTION
In case of customer complaint, verify that the customer uses the power supply for an accessory with an internal battery (cell phone with charger, MP3 player, radio equipment etc.) and that he leaves the accessory plugged in when the car is switched off. To avoid a recurrence of the problem, reprogram the vehicle using CIP19.1, or later. Refer to SI B09 05 01 (Coding, Individualization and Programming) Procedure B.

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