3 Series E92 323i (N52K) COUPE
The fuses and various plug-in relays are located in the junction box distribution box. The boards in the
distribution box are connected to various relays, depending on the equipment specification. There is an opening
in the lower section of the junction box. The junction box electronics unit is connected with the distribution box
through this opening.
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Note: For current details about the pin assignment and fuse assignment of the junction box electronics and the power
distributor, please refer to the BMW diagnosis system
Depending on the model series, various versions of the power distributor may be fitted. Depending on the
vehicle equipment, various relays are mounted on the boards in the power distributor.
System functions
Numerous functions are provided in the junction box electronics (JBE). For example, the junction box electronics unit
processes multiple signals, which it makes available to other bus subscribers on the electrical system. It also
performs control tasks.
Depending on the model series and equipment, the following functions can be controlled or signals detected by the
junction box electronics:
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Gateway
The junction box electronics unit enables a number of bus systems to communicate with one another. The
junction box electronics unit provides the gateway function for the following bus systems:
•
Body CAN
•
Powertrain CAN
•
Diagnosis wire or D-CAN (diagnosis-on CAN)
The chassis CAN (F-CAN) is connected to the junction box, but is merely looped through.
After waking, the gateway is ready to send messages to the corresponding bus systems within 20 ms.
-
Power windows
The footwell module (FRM) and the junction box electronics (JBE) control and monitor the power windows.
The junction box electronics detects the following signals and makes them available to other bus subscribers:
•
Power window switch, front passenger door
•
Power window switch, rear door on the front-passenger side
•
Power window switch, rear door on the driver's side
•
Hall sensor, rear door on the driver's side
•
Hall sensor, rear door on the front-passenger side
The junction box electronics unit controls the following actuators:
•
Power window drive, rear door on the front-passenger side
•
Power window drive, rear door on the driver's side
-
Wiper/washer system
The junction box electronics unit detects the following signals and makes them available to other bus
subscribers:
SBT Junction box E70, E71, E81, E82, E87, E90, E91, E92, E93
BMW AG - TIS
23.01.2013 19:04
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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