Activating the 48 V electrical system

Precondition

Ignition is switched off.

NOTE: RISK OF DAMAGE
Damage to the 48-V battery
If a 48-V battery that is disconnected from the electrical system is activated, the battery electronics will be damaged .

Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.

Raise the battery ground cable (1).
Remove special tool 2 452 007 .

Courtesy of BMW OF NORTH AMERICA, INC.
Release the negative battery cable (2) of the 48-V battery from the attachment.
Position the negative battery cable (2) of the 48-V battery on the negative battery terminal.

Tighten the nut (1).

TIGHTENING TORQUE SPECIFICATIONS

Negative battery cable to 48-V battery
Nut M8	tightening torque	19 Nm

Courtesy of BMW OF NORTH AMERICA, INC.

Connect the connector (1) of the CAN bus and lock it.
Clip in the clip (2).

Courtesy of BMW OF NORTH AMERICA, INC.
Activate the 48 V electrical system by closing the hood.

The activation takes place automatically.

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work

Refer to INSTALLING THE STEERING COLUMN SWITCH CLUSTER (SZL) .
Refer to INSTALLING STEERING COLUMN SHROUD LOWER SECTION .
Refer to FITTING STEERING COLUMN SHROUD UPPER SECTION .
Refer to INSTALLING THE STEERING WHEEL (SPORTS STEERING WHEEL) .
Refer to INSTALLING THE AIRBAG UNIT (SPORTS STEERING WHEEL) .
Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
Refer to CHECKING THE AIRBAG FOR FUNCTION .