BMW ONBOARD COMPUTER Manual de usuario descargar pdf (Pagina 7)

Driver Information

Instrument Cluster Power Supply

An integrated power supply unit (switching controller) delivers the supply voltage to the

instrument cluster. The lighting of the instrument cluster is therefore not dependent on the

vehicle electrical system and no fluctuations in brightness can occur in the event of distur-

bances in the electrical system.

Undervoltage detection

The instrument cluster incorporates an undervoltage-detection facility. Undervoltage detec-

tion is performed in the instrument cluster with the aid of a comparator (software-based

voltage comparison).

Note:

Overvoltage in the electrical system is also detected. In the event of a system voltage > 16

volts, it is possible for:

• Inputs and outputs to be deactivated

• Indicator and warning lamps to be deactivated or dimmed for the duration of the over

voltage

Coolant temperature gauge

In the event of coolant overtemperature, a warning sound is issued when the red indicator

and warning lamp lights up. The signal is delivered by the DME via the PT-CAN bus.

Fuel gauge

The indicator lamp is activated when the fuel reserve drops below a threshold coded at the

plant (standard = 8 liters).

Indicator Lamps

There are a total of 24 indicator and warning lamps in the instrument cluster of the new Z4.

The following two lamps are new additions to the established lamps:

• Indicator lamp for EPS: The Electric Power Steering system is used in the new Z4 for

the first time.

• Indicator lamp for lamp monitoring: This lamp indicates lamp failure in the headlights,

rear lights and brake lights and is activated by the light switch center.

The instrument cluster receives input signals through the following channels:

• Via the K bus

• Via the PT-CAN bus

• Directly from the sensors

1 2 3 4 5 6 7 8 9 10 11 12 ... 18 19

Sin comentarios

BMW ONBOARD COMPUTER Manual de usuario Pagina 7