Description And Operation

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Body Computer DELPHI (1), is located on the passenger side vehicle platform (under the dashboard).

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BCM CONNECTOR

BCM FUSES
F31	7.5 A	KL15a (INT/A)
F36	15 A	KL30 (+30)
F37	7.5 A	KL 15 (+15) for brake switch (normally open)
F38	25 A	Central locking
F43	20 A	Electric windscreen/rear window washer pump
F47	20 A	Driver side electric window
F48	20 A	Passenger side electric window
F49	7.5 A	KL15 (+15)
F50	7.5 A	KL15 (+15)
F51	10 A	KL15 (+15)
F53	10 A	KL30 (+30)

The BCM Body Computer manages the following functions:

Immobilizer (code 2 function)
Fuel level
Comfort Enable function
D + signal management
Battery voltage acquisition
Engine oil temperature signal management
Minimum engine oil pressure.
Fuel consumption
EOBD/MIL indicator
Odometer
Cruise Control management
Rear lights
Front lights.
Ignition key status
Dimmed interior lighting
Direction indicators
Brake switch status
Brake lights
Reversing light activation
Interior lights
Central locking function
Defrost
Brake pad wear
Parking brake switch
Brake fluid level
Headlight washer
Windscreen wiper
Time and date management and indication
Horn
Climate control system - Compressor management
Vehicle speed
AC activation request
External temperature sensor management
Fuel Cut Off - Fire Prevention System
DNA selector management
Logistic mode

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Comfort Enable Function: The BCM Comfort Enable function allows the vehicle windows to be operated through the passenger compartment buttons. This function is obviously always active at KEY-ON.

The BCM manages the Comfort Enable function even after key-OFF (key at STOP). At key-OFF, the BCM allows the windows to be operated for max. 3 minutes. If one of the two doors is opened during the 3 minutes following the key-OFF, the function is disabled. If one of the two doors is open at key-OFF, the function is not enabled.

DNA Selector Management: The BCM Body Computer manages the functions connected to modes that can be selected via the DNA selector. This is also used on Giulietta and MiTo. The DNA selector is electrically connected to the Body Computer which notifies the nodes involved of the configuration selected. According to the configurations selected by the user through the DNA selector, each control unit involved is self-configured to use the maps and its operating strategies.

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The Alfa 4C maintains the same vehicle dynamic configuration modes as the Alfa Giulietta and Alfa MiTo, i.e.: Dynamic, Normal and All Weather. In addition, with respect to the latter vehicles, it also features a new configuration mode: Race. The following table shows the configurations adopted by each control unit involved according to the selected mode.

ALFA ROMEO 4C
Selector mode	ABS/ESC	ENGINE	TRANSMISSION
Normal	VDC; ASR → Standard operation Q2 (TTC) Standard operation	Max. standard torque	Manual → Standard Automatic → Standard
Dynamic	VDC; ASR → Less intrusive Q2 (TTC) → optimized for use on the track Prefill	Max. standard torque Torque response is faster with the same position of the accelerator pedal	Manual → The gear shifting time is minimized (specific map) Automatic → The gear shifting time is minimized (specific map)
All weather	VDC; ASR → More intrusive the system can recognize the considerable loss of grip on slippery surfaces in order to reduce ASR intervention	Standard Torque response is more gradual with the same position of the accelerator pedal	Manual → Standard Automatic → Standard torque delivery is smoother thanks to a more gradual engine torque distribution
Race	VDC; ASR → deactivated Q2 (TTC) → optimized for the track Prefill VDC, ASR reactivate when the driver presses the brake pedal and the VDC and ASR activation thresholds are reached (the thresholds are the same as for Dynamic mode)	Max. standard torque Torque response is faster with the same position of the accelerator pedal (torque distribution is sharper than on Dynamic)	Manual → The gear shifting time is minimized Automatic → not available

The DNA selector has a stable position that can be identified with the Normal position. When the selector is moved forwards (to Dynamic) or backwards (to All Weather) when it is released, it returns to the stable position.

Normal - Dynamic passage : move the selector from the Normal position to the Dynamic position and hold it for a few moments. The Dynamic configuration will be set when the LED lights up next to letter "D" on the selector and on the instrument panel letter "D" of DNA lights up in red.

Normal - All Weather passage : move the selector from the Normal position to the All Weather position and hold it for a few moments. The All Weather configuration will be set when the LED lights up next to letter "A" on the selector and on the instrument panel letter "A" of DNA lights up in blue.

Dynamic - Race passage : move the selector from the Normal position to the Dynamic position and hold it for a few moments. The Race configuration will be set when the graph of the longitudinal and transversal G accelerations is shown in the instrument panel.

ALFA DNA DESCRIPTION

The Alfa dna system is an innovative device that acts on the vehicle dynamic control systems. Alfa dna acts on the engine, brakes, suspension, steering and transmission allowing 3 different behavior modes for the car to emphasize the most suitable driving style for the conditions or the desires of the customer. These modes are Dynamic (super sports), Normal (urban) and All Weather (maximum safety even in difficult grip conditions).

Dynamic : sports driving mode.
Normal : driving mode for normal conditions.
All Weather : driving mode for poor grip conditions (rain, snow).

The system acts on the vehicle dynamic control components:

engine management control unit: the accelerator pedal is more or less reactive depending on the Alfa dna mode selected. In "Dynamic" mode, a higher engine torque level (overboost) is available;
ABS-ESP system control unit: the system has three specific settings for each of the three Alfa dna system positions: e.g. in "Dynamic" mode the intervention of the ESP function is delayed to allow a more active driving style; in "All Weather" mode braking on surfaces with low grip is improved.
electric power steering control unit: the dna system communicates with the Dual Pinion and adapts the steering response and sensitivity to the selected mode.
transmission: in "Dynamic" mode, the dna system changes gear at a higher engine rpm level;

The system also communicates with the display systems:

instrument panel: the display shows specific trip computer information consistent with the mode selected (e.g. turbocharger pressure in "Dynamic" mode).

The three positions can be selected with a dedicated lever. The lever is monostable type, in other words it always remains in a middle position (normal). The vehicle configuration engaged is displayed by the LED lit up in the panel and by the instrument panel indication. To engage the Dynamic mode, move the lever upwards; the lever will return to the middle position once it is released. To disengage the Dynamic mode, and return to Normal, repeat the same movement with the lever. It is not possible to switch directly from Dynamic mode to All Weather mode and vice versa, it is always necessary to pass through Normal mode and then select the other configuration. If Dynamic mode was engaged before a key-off, then the configuration will automatically return to Normal mode at the next key-on. If, on the other hand, All Weather or Normal mode was engaged before switching off, the configuration will be maintained when the engine is next started. Dynamic mode is automatically disengaged when the vehicle speed exceeds 110 Km/h and then engaged again when the speed drops below this level. If there is a system or dynamic vehicle control selector failure, no configuration can be engaged and the message "mode not available" will be shown in the control panel display.

DNA FUNCTIONAL DESCRIPTION

The dna system selector H139 sends an analogue signal to pin 56 of connector F of Body Computer M001 depending on the selected mode.
Signals to switch on the "d" and "n" LED, located on the selector H139, are sent from pins 31, 46 of connector B of Body Computer M001.
The Body Computer M001 - connector A - receives a direct power supply from the battery through the line protected by maxi fuse F01 of the engine compartment control unit B001.
The Body Computer M001 receives an ignition-controlled power supply (INT) at pin 11 of connector E: this signal is used, amongst other things, to "wake up the network".
The Body Computer M001 is connected, via the CAN, to the other nodes, in particular the steering control unit M086, the ABS-VDC control unit M051 and the engine management control unit M010.
It is also connected to the instrument panel E050 to which it sends the signals to display the mode engaged and system failure.
The dna system selector H139 is lit when the key is on.