6 Series E64 650i (N62TU) CONVER
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Transmission management
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Internal monitoring against "self-acceleration"
Evaluation of road speed signal
The road speed signal is required by the DME control unit in order to perform several functions:
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Speed limiting function:
Once the maximum road speed has been reached, the fuel injection and ignition are adjusted. If required,
individual ignition and injection signals are suppressed. A "soft" speed limiting function is thus carried out.
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Control of A/C compressor:
When the air-conditioning system is switched on, the A/C compressor is switched off during full-load
acceleration,
provided that: the car's road speed is less than 13 km/h.
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Idle speed control:
If the car's road speed is 0 km/h, the idle speed is adjusted (depends on A/C compressor ON, selected
drive position for automatic transmission, light ON).
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Poor-road-surface detection:
At low road speeds, the check for smooth engine operation is switched off.
A/C compressor activation
The DME control unit supplies the signal to actuate the A/C compressor.
The A/C compressor is switched off under the following conditions:
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Full engine load
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car's road speed under 13 km/h
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Engine overheating
The IHKA actuates the A/C compressor. The DME sends the signal on the bus system.
Intelligent alternator regulation
Intelligent alternator regulation systematically controls the battery charge state.
The battery is predominantly charged in overrun mode.
Depending on the battery charge state, the battery will not be charged during an acceleration phase.
Active air flap control
Active air flap control regulates the air supply for the engine and assemblies cooling system by only opening the
air flaps as they are needed.
Notes for service staff
The following information is available for service staff:
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General note: [more ...]
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Diagnosis: [more ...]
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Encoding/programming: ---
US national version
Fuel tank leakage diagnosis module
The fuel system leak test is regularly conducted when the engine is switched off. Here, the following processes are
SBT 8-cylinder spark-ignition engine N62TU E60, E61, E63, E64, E65, E66, E70
BMW AG - TIS
06.02.2013 10:29
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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