1 Series E87 118d (M47T2) 5-door
from 03/2007: Filter replacement: see Service Booklet
> E70: IHKA
Filter replacement: see Service Booklet
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Stratification control and rear stratification control
> E70 IHKA High and E90, E91, E92, E93 IHKA
The selected potentiometer setting is transposed into the flap position of the specific flap motor (front and rear
stratifying flap motor and rear ventilation flap motor).
> E70 IHKA High with automatic rear air conditioning
Due to the separate settings for the left and right sides in the rear, there are 2 rear stratification controls and
2 ventilation flap motors in the rear.
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LIN bus
A data line supplies all component on the LIN bus with the necessary control information. This data line also
carries the status reports of the components back to the IHR/IHKR/IHKA control unit. The control unit controls
the following components via the LIN bus:
•
Electric auxiliary heater
•
Flap motors
The following control units contribute to the operation of the IHR/IHKR/IHKA:
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SZM: Centre console switch cluster
The SZM is connected to the IHR/IHKR/IHKA control unit via a 14-pin connector.
The IHR/IHKR/IHKA control unit serves as the interface between the SZM and the K-CAN.
The IHR/IHKR/IHKA control unit assumes the following tasks for the SZM:
•
Reading off settings made by pressing buttons
•
Actuating LEDs for function lighting
•
Dimming LEDs for function and search lighting
•
Forwarding relevant CAN messages
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JBE: Junction box electronics
The JBE is the data interface (= gateway) between the K-CAN and the PT-CAN. (K-CAN = body CAN; PT-CAN
= powertrain CAN.)
The JBE receives input signals from some of the sensors and control units (e.g. AUC sensor, DME/DDE control
unit, IHR/IHKR/IHKA control unit).
The junction box consists of the JBE and the power distributor. Amongst other things, the power distributor
supplies power to the heated rear window. The JBE controls the heated rear window.
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M-ASK or CCC or CHAMP: Multi-audio system controller or Car Communication Computer or multimedia
platform
The controller signals for selecting the menu are processed in the M-ASK or CCC or CHAMP (multimedia
platform: CHAMP; Central Head Unit and Multimedia Platform).
To actuate the CID (Central Information Display), the red-green-blue signals from the graphics processor are
converted into digital signals.
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CAS: Car access system
The CAS comprises the remote control functions, amongst other things.
The CAS assigns a personal ID code to every remote control. The CAS transfers the personal ID code to the
IHKA control unit via the K-CAN.
Key-based settings (Key Memory) are stored in the IHKA control unit.
SBT Integrated heating control and air-conditioning system E70, E81, E82, E87, E90,
BMW AG - TIS
18.01.2013 18:47
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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