2009 LAMBORGHINI MURCIÉLAGO Service Repair Manual

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Lifting System
This is an hydraulic device enabling to lift the front part of the vehicle when driving at low speed, to allow access to areas with uneven surfaces. The system is composed of the following components:•Front shock absorbers;
• Electronic control unit (GFA);
• Ascent or descent control button;
• Connecting hoses and electric wires;

Lifting system layout (Fig.1)
A. Front shock absorbers
B. Electronic control unit (GFA)
C. Ascent or descent control button
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F. Hydraulic pump
The system can be activated up to the maximum speed of 70 Km/h (30 Km/h for Japan); when it reaches this speed threshold the system will automatically go to the DOWN position. Moreover the system can recognize the following lifting system errors: • System pressure indicated simultaneously by two pressure switches as under 20 bars and over 70 bars (one or
both pressure switches damaged or disconnected).
• Vehicle ascending or descending time greater than 120 seconds (hydraulic or solenoid valve problem).
• Wrong vehicle speed indication.
The warning light on the dashboard will blink quickly to signal errors (it blinks slowing during raising/lowering).If problems occur the L.DAS software is used, which checks system errors and proceeds by resetting them.
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If an error occurs, the ECU places the system in the DOWN position and the warning light will simultaneously blink quickly on the dashboard.
Lifting system control diagram (Fig.2)
A.GFA control unit
B. Vehicle speed signal
C. Lifting system button
D. Lifting system solenoid valves
E. Lifting system pressure switches
F. Lifting system warning light
G. +12 V power supply

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• Hydraulic pump (it is the same used for power steering systems with capacity suited to the new system);
• Warning light on instrument panel;
• Vehicle speed signal.
Lifting system hydraulic connections (Fig.3)
1. Ascent solenoid valve
2. Descent solenoid valve
3. Pressure switch
4. Solenoid valve assembly
5. Flow separator
6. Shock absorber lower chamber
3 From power steering pump
A. To power steering system
B.   7RÀRZVHSDUDWRU
R. To power steering oil reservoir
O. To front shock absorbers
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The GFA controls this system.

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Low position hold The circuits has the following characteristics: •Solenoid valve ( )LJ): open;
• Solenoid valve ( )LJ): open.
In normal conditions, the vehicle front part height is determined by the standard adjustment.
7KHÀXLGSDVVHVWKURXJKWKHVROHQRLGYDOYH )LJ) and is sent to the reservoir.
The pressure inside the system reaches 20 bars and the minimum pressure switch ( )LJ) opens.
Following occasional pressure increases (e.g. rough road surface), the minimum pressure valve ( )LJ) opens.
The excess pressure is relieved by means of the solenoid valve ( )LJ).
Furthermore, the ECU cyclically closes the solenoid valves for short times during vehicle operation (raising condition, see next paragraph) to keep the hydraulic circuit pressure in the range of 20 bars.
Low position hold (Fig.4)
1. Ascent solenoid valve
2. Descent solenoid valve
3. Minimum pressure switch
4. Maximum pressure switch
5. Check valve
6. Minimum pressure valve
3 Power steering pump
R. Reservoir
O. Front shock absorbers

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Ascent The circuits has the following characteristics:•Solenoid valve ( )LJ): closed;
• Solenoid valve ( )LJ): closed.
The driver can press the “UP” button for longer than two seconds to lift the front axle.
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UP position is reached.
The ascent solenoid valve ( )LJFORVHVWRDOORZWKHSDVVDJHRISUHVVXUL]HGÀXLGIURPWKHSRZHUVWHHULQJSXPS
to the pressure accumulator and to the two front shock absorbers. The descent solenoid valve ( )LJ) closes to
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The process is stopped when maximum height, i.e. approximately 40-50 mm more with respect to home position,
is reached. This position is reached when the pressure in the system reaches 70 bars and the maximum pressure switch ( )LJ) opens.
Ascent (Fig.5)
1. Ascent solenoid valve
2. Descent solenoid valve
3. Minimum pressure switch
4. Maximum pressure switch
5. Check valve
6. Minimum pressure valve
3 Power steering pump
R. Reservoir
O. Front shock absorbers

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High position hold The circuits has the following characteristics: •Solenoid valve ( )LJ): open;
• Solenoid valve ( )LJ): closed
The pressure in the system is kept at 70 bars. The maximum pressure switch ( )LJ) is open.
7KHÀXLGSDVVHVWKURXJKWKHVROHQRLGYDOYH )LJ) and is conveyed to the reservoir. The descent solenoid valve
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High position hold (Fig.6)
1. Ascent solenoid valve
2. Descent solenoid valve
3. Minimum pressure switch
4. Maximum pressure switch
5. Check valve
6. Minimum pressure valve
3 Power steering pump
R. Reservoir
O. Front shock absorbers


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Descent The circuits has the following characteristics: •Solenoid valve ( )LJ): open;
• Solenoid valve ( )LJ): open.
The vehicle can return to normal position either by driver’s manual command (by pressing the DOWN button) or automatically when the vehicle exceeds a speed of 70 km/h (30 km/h for Japanese version.)
7KHÀXLGSDVVHVWKURXJKWKHVROHQRLGYDOYH )LJ) and is conveyed to the reservoir. The descent solenoid valve
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1. Ascent solenoid valve
2. Descent solenoid valve
3. Minimum pressure switch
4. Maximum pressure switch
5. Check valve
6. Minimum pressure valve
3 Power steering pump
R. Reservoir
O. Front shock absorbers

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The ascent and descent phases last for approximately 20 seconds.
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