2009 LAMBORGHINI MURCIÉLAGO Service Repair Manual

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Alternator disassembly 3UHOLPLQDU\RSHUDWLRQV •
Disassemble the rear engine hood and the rear compartment (spoiler holder) (081303).
• Disassemble the silencer covers.
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1. Disconnect the alternator wiring harness ( A-Fig.1).
2. Disconnect the vent pipe ( B-Fig.1) from the alternator cover after loosening the relative clamp.
3. Remove the auxiliary belt (010103).
4. Remove the alternator’s heat-proof panel ( C-Fig.2), unscrewing the screw ( D-Fig.2) and the 2 bolts ( E-Fig.2).

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5.
Remove the screw ( F-Fig.3), freeing the pipe ( G-Fig.3).
6. Remove the 2 bolts ( H-Fig.3) that secure the alternator and remove the alternator.

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Alternator assembly
1.
 3RVLWLRQWKHDOWHUQDWRU¿[LWWRWKHUHDUGLIIHUHQWLDOE\PHDQVRIWKHEROW (A-Fig.1 ).
2. Position the pipe ( B-Fig.1DQGVHFXUHLWZLWKWKHVFUHZ C-Fig.1).
3. 6HFXUHWKHKHDWSURRISDQHO D-Fig.2WLJKWHQLQJWKHEROWV E-Fig.2DQGWKHVFUHZ F-Fig.2).
4.  ,QVWDOOWKHEHOWVOLGH (010105).

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5.
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Signal Frame Management
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SRVLWLRQDOWRJHWKHUWKH\VXSSO\WKH/,(FRQWUROXQLWWKHHOHPHQWVQHFHVVDU\IRUUHFRJQL]LQJHQJLQHtiming and obtaining the correct ignition and injection sequence.The same signals are also used by the control unit for operating the phase transformers.
Upon ignition, the control unit acknowledges the injection and ignition timing, which are fundamental for the
subsequent operation of all the strategies. This acknowledgement takes place on the basis of the interpretation
of the sequence of signals coming from the engine speed sensor (one which serves both systems) on the engine À\ZKHHODQGIURPWKHHQJLQHWLPLQJVHQVRURQWKHFDPVKDIW
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10°. This wheel is read by an inductive pick-up that generates a sinusoidal wave.
A non-uniform length 4 toothed phonic wheel is splined on each camshaft (4) and read by Hall effect sensors that provide a panel 0-5V signal.
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AD converters. Based on these signals, the correct ignition (1-7-4-10-2-8-6-12-3-9-5-11) and injection sequence is
carried out. The cam positions and correct control of the phase transformers are also calculated.
The signal provided is of the sinusoidal type, it must be transformed into a digital signal using an A/D converter inside the control unit. 68&7,21 SMOT: Engine Speed and TDC Sensor Signal
SCAM 1-6: Cylinder Bank 1-6 Timing Sensor Signal
SCAM 7-12: Cylinder Bank 7-12 Timing Sensor Signal
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SCAM 1-6: Cylinder Bank 1-6 Timing Sensor Signal
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The ignition control mainly consists of determining the spark advance required according to the engine operating
conditions and its actuation by the piloting of the power transistor incorporated in the power module inside the engine control unit.
The spark advance calculated on the basis of the engine load and speed is then corrected according to different engine operating conditions.
Each coil primary is supplied by the battery voltage through a relay which, in its turn is controlled by the engine
control unit: The connection to round takes place through the power transistor.
The engine control unit, after a cylinder TDC signal, sends a signal, with a certain delay, to the relevant power
module, that starts at that moment (conduction start moment) to send current to the coil primary circuit to bring the
value to about 6 Amperes (saturation current).
Obviously this moment varies in angle in relation to the bursting TDC of each cylinder since the dwell needed to
saturate the current in the coil primary circuit is constant, whereas the time required by the engine to make two revolutions (cycle) reduces as the rotation speed increases. 7KHHQJLQHFRQWUROXQLWVLJQDOUHPDLQVXQWLOWKHPRPHQWRIWKHGHVLUHGVSDUNDGYDQFHRQWKHVSHFL¿FF\OLQGHU
The moment the control unit removes the signal from the power module, the current in the coil primary circuit is cut
off. This, by induction, generates a sudden rise in voltage on the secondary circuit that is discharged to ground, generating a spark on the ignition spark plug.(DFKF\OLQGHUKDVDFRLO¿WWHGGLUHFWO\RQWRWKHVSDUNSOXJZLWKRXWDKLJKYROWDJHFDEOH
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stopped.

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A Cylinder Bank 1-6 Module CommandsB Cylinder Bank 1-6 Connection Diagram
B1/../B6: Cylinder (with Power Transistors) Bank 1-6 CoilsIgnition order: 1-4-2-6-3-5
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onto the cylinder head for each cylinder bank. The coils have a magnetic closed circuit with the windings in a plastic FRQWDLQHULPPHUVHGLQHSR[\UHVLQ(DFKFRLOLVGLUHFWO\FRQQHFWHGWRWKHVSDUNSOXJwithout high voltage cables.
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A. Ignition switch
B. Battery
C. Power supply relay
D. Pencil coil
E. Spark plug
F. Engine control unit
The coil primary circuit is supplied by relay, controlled by the engine control unit after it has acknowledged the SMOT signal coming from the relevant sensor (thus with engine rotating driven by the starter motor).