61 20 908 Performing battery "power reset" for programming/coding control units
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