3 Series E90 316i (N45) SAL
Electrical system and electronics
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Vehicle circuit architecture
In part, the E90 has the same vehicle circuit as the E60 and E87. This means that in many respects the 3-Series
has all the technology of the 5-Series.
The E90 has the same bus systems as the E60: K-CAN, MOST, PT-CAN and F CAN.
The difference between it and its predecessor, the E46, is significant: The E46 did not yet have a 2000 vehicle
circuit (2000 vehicle circuit is the BMW description for the vehicle circuit on the E65 and higher).
[more in SI Technical (SBT) 61 02 03 015]
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Power supply
The E90 has a similar system for the power supply as the E87 and the E60 (components such as the intelligent
battery sensor and software).
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Power management when parked, so that the starting capability of the vehicle is maintained.
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Power management when the engine is running, so that the charge balance is always correct.
The software for the power management is in the DME or in the DDE (DME: Digital Engine Electronics;
DDE: Digital Diesel Electronics).
[more in SI Technical (SBT) 61 03 04 092]
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New control units
The following control units are new, by comparison with the E87:
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Footwell module (FRM)
[more in SI Technical (SBT) 61 04 04 094]
•
Junction box with distribution box with the junction box electronics (JBE) control unit
[more in SI Technical (SBT) 61 05 04 095]
•
Roof function centre (FZD)
[more in SI Technical (SBT) 61 02 04 091]
•
Longitudinal dynamics management (LDM), see below
•
Active steering (AL)
SBT Complete vehicle E90
BMW AG - TIS
18.01.2013 19:32
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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