1 Series E81 130i (N52K) 3-door
A phototransistor is installed in the instrument cluster to calculate the necessary brightness (display, indicator
and warning lights, scales, needles).
The brightness value calculated in the instrument cluster is output on the K-CAN (e.g. for the Central
Information Display).
Dimming can be set individually via a menu in the instrument cluster.
When the vehicle lighting is switched on, these individual settings and the phototransistor are used to control the
dimming.
When the vehicle lighting is switched off, the dimming is only controlled by the phototransistor (display
brightness according to ambient light).
Actuation for moving-disc instrument
The moving-disc instrument for the set speed is driven by a stepper motor.
The signal for the set speed is transmitted on the bus by the control unit for longitudinal dynamic management
(LDM). This signal is converted to control pulses for the stepper motor.
The set speed is transmitted with a "resolution" of 1 km/h and displayed.
Shift point indicator
The shift point indicator is only available in conjunction with manual transmission.
A great deal of fuel can be saved by changing gear in good time. The shift point indicator assists the drive in
this. The current driving situation is identified on the basis of roadspeed and vehicle acceleration. If the gear
currently engaged is not the most economical, a gear change recommendation appears in the display. The shift
point indicator can be activated and deactivated on the on-board computer. The shift point indicator is
deactivated when the vehicle is delivered.
Redundant data storage
The following instrument cluster data are redundantly stored in the Car Access System (CAS):
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Distance recorder
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Trip meter
•
CBS data
This is conditional upon the same vehicle identification number being stored in both control units.
If different vehicle identification numbers are stored, the manipulation dot will appear in the LCD display.
Important: Do not replace the instrument cluster and the CAS control unit at the same time.
The instrument cluster and the CAS must not be replaced at the same time. CBS data would then be lost.
Notes for service staff
The following information is available for service staff:
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General note: [more ...]
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Diagnosis: [more ...]
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Encoding/programming: ---
Subject to change.
SBT Instrument cluster E81, E87, E90, E91, E92, E93
BMW AG - TIS
22.01.2013 13:33
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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