3 Series E91 330xi (N52) TOUR
The IHKA control unit is connected to the FZD control unit via the K-CAN.
[for further information, please refer to SI Technology (SBT) 64 01 01 090]
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KOMBI: Instrument cluster
The instrument cluster control unit in the instrument cluster sends messages to the FZD control unit, e.g.
regarding the dimming of the instrument lighting. The FZD control unit dims e.g. the LED in the sliding/tilting
sunroof switch.
The instrument cluster control unit also receives messages from the FZD control unit:e.g. the FZD control unit
will send a message to the instrument cluster control unit when the anti-trap circuit on the sliding/tilting sunroof is
triggered. The instrument cluster control unit then converts this message to a Check-Control message in the
vehicle's system.
The instrument cluster control unit is connected to the FZD control unit via the K-CAN.
[for further information, please refer to SI Technology (SBT) 62 01 04 074]
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RLS / RLSS: rain-light sensor / rain-light solar sensor
The rain-light sensor or rain-light solar sensor is like the condensation sensor in the base of the electrochromic
interior mirror.
The RLS or RLSS detects water on the windscreen and the ambient brightness. The solar sensor in the RLSS
also records the presence of light or heat sources (e.g. direct sunlight), which could affect the climate in the
vehicle interior.
The signals from the RLS or RLSS are used to control the wiper function and for automatic driving lights control.
With the RLSS, the signals from the solar sensor are also used to control the functions of the air conditioning.
The RLS or RLSS is a self-diagnosing control unit.
The RLS or RLSS is connected by a LIN bus to the roof control panel (LIN: Local Interconnect Network,
i.e. local data bus).
[for further information, please refer to SI Technology (SBT) 63 03 02 007]
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SZL: Steering Column Switch
The SZL control unit sends signals to the FZD control unit, e.g. from the wiper switch.
The SZL control unit is on the F-CAN (Chassis CAN).
Data is transmitted to the K-CAN via a number of data buses and control units.
Signal path: SZL -> F-CAN -> Junction box (merely looped through) -> F-CAN -> DSC (Dynamic Stability
Control) -> PT-CAN -> JBE control unit in junction box -> K-CAN -> FZD -> Rain-light sensor or rain-light solar
sensor.
In the High variant of the roof control panel, the following components are controlled by the FZD control unit:
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Interior lighting, front
The interior lighting includes the interior lights and the reading lights, left and right.
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Front interior light
The light source for the front interior light is a 6 W xenon lamp.
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Reading light for driver's side and passenger side
There is one reading lamp each on the right and on the left. The light source for the reading lamp is a 6 W
xenon lamp.
•
LEDs for top-light
The top-light comprises 2 orange LEDs.
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Lighting for the make-up mirrors
The lighting for the make-up mirror comes on automatically whenever the sliding visor for the make-up mirror is
opened (regardless of whether or not the interior lighting is switched on).
SBT Roof control panel E70, E81, E87, E90, E91, E92, E93
BMW AG - TIS
22.02.2013 01:47
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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