Overview of functions

The electrical/electronics system comprises the following functions:

Car Access System

The Car Access System (CAS) controls access to the vehicle.

The CAS control unit is the master control unit for the central locking system, power windows and sliding/tilt sunroof (remote control and convenience features).

Fig 1: Identifying Car Access System

Courtesy of BMW OF NORTH AMERICA, INC.

Central locking system

The front door central locking system is controlled by the driver's door modules (TMFA) or front passenger door modules (TMBF).

The central locking system for the rear doors, fuel filler flap and the boot-lid unlocking are controlled by the body basic module (KBM).

In the E61 the rear window is also monitored by the central locking system.

The automatic luggage compartment lid actuation (tailgate lift) has an automatic soft-close mechanism.

In the E63/E64 the storage compartment in the center console is also monitored by the central locking system.

Fig 2: Identifying Central Locking System

Courtesy of BMW OF NORTH AMERICA, INC.

Power windows

The power windows in the front doors are controlled by the driver's door module (TMFA) and the front-passenger door module (TMBF). The window lifters for the rear doors are actuated by the body basic module (KBM).

In the E63 there are no power windows for the rear doors.

In the E64 the rear power windows do not have an anti-trap circuit.

Fig 3: Identifying Door Modules

Courtesy of BMW OF NORTH AMERICA, INC.

Sliding/tilting sunroof

The sliding/tilt sunroof is controlled by the control unit for the sliding/tilt sunroof (SHD control unit). The SHD control unit is attached directly to the motor for the sliding/tilt sunroof.

The E61 can be fitted with a panorama glass sunroof.

The E63 can be fitted with a glass tilt sunroof.

Fig 4: Identifying Sliding/Tilting Sunroof

Courtesy of BMW OF NORTH AMERICA, INC.

The wash/wipe system is controlled by the body basic module KBM. The rain-light sensor is standard equipment.

The E61 has a wash/wipe system for the rear window.

Fig 5: Identifying Wash/Wipe System

Courtesy of BMW OF NORTH AMERICA, INC.

Door mirrors

The door mirrors are controlled by the driver's door module (TMFA) and the front-passenger door module (TMBF). The door modules communicate via Byteflight.

Fig 6: Identifying Door Mirror

Courtesy of BMW OF NORTH AMERICA, INC.