Digital Input Signals

The normal ignition switch terminals (KL R, KL 15 & KL 50) are input to the cluster. Various functions are dependent on ignition switch position.

STEERING COLUMN SWITCH  - As with previous systems the turn signal stalk is used to call up BC functions.

BRAKE PAD WEAR SENSORS  - The pad sensor inputs are used to illuminate the brake pad warning indicator as in the past.

Fig 1: Identifying Digital Input Signals Flow Chart (Brake Pad Wear Sensors)

Courtesy of BMW OF NORTH AMERICA, INC.

INSTRUMENT PANEL BUTTON  - The reset button is used to reset the trip - odometer as in the past. It will also display the mileage, if pressed with the key switched OFF. This button is also used for the Base BC/instrument cluster test functions.

INPUTS FOR WARNING LAMPS  - Various switches are used to signal the cluster for warning and indicator lamp illumination including:

WARNINGS FOR CONVERTIBLES 

• The seat belt warning lamp is illuminated when the seat belt is not fastened and FLASHES when the front seat back is not locked into position.
• The Roll over Protection System warning lamp is illuminated when there is a fault in the RPS system.