3 Series E91 330xi (N52) TOUR
On vehicles from 06/2006, cruise control with brake function is integrated into DSC.
These vehicles then only have an LDM control unit if active cruise control is fitted.
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Body CAN
The instrument cluster receives all other messages that could mean a display in the instrument cluster
(e.g. Check-Control messages) through the body CAN (K-CAN).
System functions
The instrument cluster comprises the following system functions:
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Operational readiness
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Operating voltage range
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Brightness control
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Actuation for moving-disc instrument
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Shift point indicator
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Redundant data storage
Operational readiness
Operational readiness depend on the terminal.
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Terminal 30
The instrument cluster is connected to terminal 30 via the junction box.
The terminal status (terminal R or terminal 15) is sent to the instrument cluster via the K-CAN. If terminal 30
is active (terminal R OFF), the instrument cluster is in standby mode.
The instrument cluster can be activated by pressing the reset button - the following are then displayed:
distance recorder, clock, outside temperature, fuel level (can be encoded).
The display goes out after 25 seconds.
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Terminal R
The following are evaluated when terminal R is switched ON: turn-signal/main-beam switch and fuel level
sensor.
The time and outside temperature appear in the LCD display.
The on-board computer functions can be called up via the on-board computer button (display unlimited).
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Terminal 15
When terminal 15 is switched ON, a pre-drive-check is carried out on the permanent indicator and warning
lights. The display elements show the current figures, e.g. fuel level.
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Terminal 50 (starter motor)
While the engine is being started, the on-board supply voltage may drop so far that the internal voltage
supply (6 volts) can no longer be maintained.
In this case, no analogue signals can be evaluated. Moreover, no data will be able to be stored (in
EEPROM).
Operating voltage range
The operating voltage range is from 9 to 16 volts. If the voltage drops below 7.5 volts, undervoltage will be
recognised. If the voltage rises over 16 volts, no analogue inputs can be evaluated.
Brightness control
The instrument cluster is illuminated when the lights are switched ON.
SBT Instrument cluster E81, E87, E90, E91, E92, E93
BMW AG - TIS
22.02.2013 01:49
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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