3 Series E46 316i (N45) SAL
The air mass is computed by the DME from the signal for oxygen-sensor control and other input variables.
The spark-ignition engines in the E87 and E90, E91 no longer have an oil dipstick. The electronic oil level check
can be performed via a menu in the instrument cluster (alternative: Central Information Display).
The N46B20oL from the E87 is installed on the E90.
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E83, E85
The N46 with the higher power rating (N46B20oL) will also be installed in the Z4 and E83 from mid-2005.
The vehicle electrical system in the E83, E85 is based on the vehicle electrical system in the E46.
Like the E46, the N46 on the E83, E85 is equipped with a secondary air system.
There are 2 different versions of the exhaust system:
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Left-hand drive: Air-gap-insulated exhaust manifold with 2 oxygen sensors
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Right-hand drive: Split exhaust manifold with 4 oxygen sensors
The engines which have been further developed also include redesigned digital engine electronics (DME).
In the N46, the control for the Valvetronic system has been integrated into the DME control unit. The DME
control unit now has 2 connector chambers.
On the E81, E87, E90, E91, the N46 engine no longer has a secondary air system (catalytic converter located
close to the engine).
For the first time on a 4-cylinder engine, bus communications are made through the electrical system 2000.
(Electrical System 2000: All control units are addressed at the same time with Key Word Protocol 2000.
N45/N46 - engine-specific data: [more ...]
N45TU2 and N46TU2 engines:
From 03/2007, the N45TU2 and the N46TU2 will be introduced.
The N45TU2, N46TU2 will not be used in the E83, E85.
The N45TU2/N46TU2 is an advanced development of the N45/N46. Compared to the N46, the N46TU2 engine
develops more output.
All engines satisfy the EURO 4 emissions standard.
The advanced developments of these engines also have modified digital engine electronics (DME).
Note: Model designation N45TU2 and N46TU2
"TU" stands for "technical update". "2" stands for 2nd technical update of the engine.
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N45TU2
The following power ratings are available for the N45TU2:
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N45B16OL
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from 03/2007: E87, E90
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from 09/2007: E81
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N46TU2
The following power ratings are available for the N46TU2:
•
N46B20uL
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from 03/2007: E81, E87, E90
•
N46B20oL
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from 03/2007: E81, E87, E90, E92, E93
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from 09/2007: E91, E60
N45TU2/N46TU2 - engine-specific data: [more ...]
This SI Technology bulletin (SBT) describes the engine control system for the following model series:
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N45 and N46 engine: E46, E83, E85
SBT Engine control for N45, N46 E46, E60, E81, E83, E85, E87, E90, E91, E92, E93
BMW AG - TIS
22.01.2013 17:30
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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