61 20 908 Performing battery "power reset" (for programming/coding control unit(s))
WARNING: This page is about a different car, the 2005 BMW 545i and 2004 BMW 545i. 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 terminal.
- Reconnect battery negative terminal (to ensure bus activity).
- Waiting time (5-10 seconds).
- Disconnect battery negative terminal.
- Waiting time (1 minute).
- Connect battery negative terminal and tighten, tightening torque, refer to 61 21 1AZ in GENERAL ELECTRICAL SYSTEM - TIGHTENING TORQUE - E60 .
- Connect and switch on battery charger.
- Switch ignition on.