BMW 7 Series: System Overview
The system circuit diagram for the outside temperature is displayed below.
The diagram is structured in such a way that only the control units and control elements directly involved in the instrument cluster are shown.
The instrument cluster receives a large number of different bus signals that provide information (speed, CC messages, etc.) for the various displays and indicators. These bus signals are requests to the instrument cluster and are therefore not listed in this product information.
The only directly connected component that can be seen in the system circuit diagram is the outdoor temperature sensor.
This input signal is read directly in the instrument cluster and made available from here to all other bus users.
The outdoor temperature sensor wiring "passes through" the junction box and is processed directly by the instrument cluster.
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Fig. 6: System Circuit Diagram For Outside Temperature
OUTSIDE TEMPERATURE SYSTEM REFERENCE CHART
- Central Gateway Module (ZGM)
- Car Access System (CAS)
- Instrument Cluster
- Outside Temperature Sensor
- Junction Box
- Front Distribution Box
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Principles Of Operation
Instrument Cluster
The instrument cluster receives information on the wiring harness in the form
of analog and digital electrical
signals. These signals are processed and displayed in the instrument
Central Information Display
Main Menu
The display in the main menu consists of the following menu items:
CD/Multimedia
Radio
Telephone
Navigation
Contacts
Vehicle Info
Settings.
Fig. 16: Display Telephone
In addition t
Vehicle Info Menu
BMW ASSIST Menu
The "Vehicle Info" menu contains all the information regarding the condition,
service intervals, the on-board
computer and the journey computer of the vehicle.
In addition, this menu
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Conducting Leak Test On Fuel Tank And Tank Venting System
IMPORTANT: On vehicles with tank leak diagnosis modules (DMTL), do not
work with
external pressurization as the tank ventilation system will leak under this
condition.
On account of emerging fuel vapors, carry out all work in well ventilated rooms.
Or use a suitable extractor system.
Observe cou
Installing Headlight Repair Kit
Necessary preliminary work:
Remove HEADLIGHT.
NOTE: Damaged retaining tabs (1, 2, 3) can be replaced with the repair
kit.
Replacement of headlight is not required!
If necessary, use screws from BMW Parts Department 7 225 228 repair kit.
Fig. 21: Identifying Headlight Holder, Screws, And Retain
