Power Distribution Box

The PEB can be diagnosed and programmed. It is important that after the PEB is replaced, all four control units are programmed to bring them up to date.

The 20 A fuse serves to protect the high voltage cable to the APM and the 40 A fuse serves to protect the high voltage cable to the EKK. Each of the high voltage fuses protects the high voltage positive wire.

If the high voltage fuses are defective, the entire PDB must be replaced.

Fig 1: Identifying Power Distribution Box

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 2: Power Distribution Box Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.