5 Series E60 530d (M57TU) SAL
The brightness signal is calculated in the instrument cluster on the basis of the following values:
-
Signal from the phototransistor (ambient luminosity)
-
Dimmer signal (on the control panel for the lights)
The brightness signal calculated in this way is made available to the other control units via the K-CAN.
Undervoltage detection and overvoltage detection for the instrument cluster
If the on-board voltage drops below approximately 7.5 volts, no further read or write accesses to the data
memory are permitted. The instrument cluster initiates data backup in advance of a pending reset triggered by
undervoltage. Overvoltage in the onboard power supply is also detected.
If the on-board voltage is greater than 16 volts:
-
Certain inputs and outputs are disabled in order to protect the hardware.
-
Indicator and warning lights are dimmed for the duration of the overvoltage or are deactivated in order to
prevent overload.
Heating and contrast for the liquid-crystal display
A heater built into the display ensures good legibility even at low ambient temperatures. The heater is switched
on if the temperature of the liquid-crystal display is below 10
°
Celsius. The switch-on signal is transmitted (by
the CAS control unit to the instrument cluster via the K-CAN) when the driver's door is opened.
The contrast of the liquid-crystal display is automatically set as a function of the temperature of the liquid-crystal
display and the operating time. A counter registers the standby times and operating times logged by the
instrument cluster, so that due allowance can be made for ageing. Contrast voltage is automatically adjusted
depending on increasing time in operation (ageing).
On-board computer functions
There are two ways in which on-board computer functions can be displayed:
-
in the instrument cluster
-
in the Central Information Display (extended on-board computer functions)
The on-board computer functions for the instrument cluster are as follows:
-
Outside temperature
-
Time
-
Date
-
Average consumption (resettable)
-
Range
-
Average speed (resettable)
The on-board computer function required can be displayed: When terminal R is ON by pressing the on-board
computer button on the turn-signal/main-beam switch in a specific sequence. The last line is followed by an
empty line, before the first line reappears on the screen (rolling list). When terminal R switches ON, the on-board
computer function most recently selected by means of the on-board computer button reappears. If the on-board
computer button is pressed and held down for longer than 2 seconds, the values of the resettable on-board
computer functions are recalculated.
Check-control messages
The Check-Control system informs the driver if important functions, information or warnings are no longer
available. Check-Control messages are displayed in the form of a symbol on the LCD display (red, yellow,
orange).
SBT Instrument cluster E60, E61, E63, E64, E70
BMW AG - TIS
22.02.2013 10:47
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 6 -
