61 20 908 Performing battery "power reset" for programming/coding control units
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2007 BMW 530xi. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Observe SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .
The following steps must be carried out for a "power reset":
- Switch off and disconnect battery charger
- Switch off ignition
- Cars with ignition key: Turn ignition key to 0 position
- Cars with identification sensor: Remove identification sensor from slot
- Cars with comfort access system: Make sure terminal is in 0 position
- Disconnect BATTERY NEGATIVE LEAD
- Reconnect battery negative terminal (to ensure bus activity)
- Waiting time (5-10 seconds)
- Disconnect BATTERY NEGATIVE LEAD
- Waiting time (1 minute)
- Connect battery negative terminal and tighten. Tightening torque: 5 Nm
- Connect and switch on battery charger
- Switch ignition on