ABS LAMBORGHINI GALLARDO 2009 Owner's Guide

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Standard
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%UDNHWHFKQLFDOGDWD • Four ventilated disks, hydraulic, dual circuit with power brake, ABS and ESP system
• Front brakes ( Fig.1):
Disk diameter ( Standard): 365 mm
Disk diameter ( Carbon Ceramic): 380 mm
Disk thickness ( Standard): 34 mm
Disk thickness ( Carbon Ceramic): 38 mm
Calipers ( Standard): 8 pistons
Calipers ( Carbon Ceramic ): 6 pistons
• Rear brakes ( Fig.2):
Disk diameter ( Standard): 335 mm
Disk diameter ( Carbon Ceramic): 356 mm
Disk thickness ( Standard): 32 mm
Disk thickness ( Carbon Ceramic): 32 mm
Calipers ( Standard): 4 pistons
Calipers ( Carbon Ceramic ): 4 pistons
• Mechanical disk parking brake on rear wheels

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$ 'LVDVVHPEOLQJWKHEUDNHERRVWHU 3UHOLPLQDU\RSHUDWLRQV • Disassemble the luggage compartment (080603).
Left hand drive• Disassemble the ABS control unit (061403).
Right hand drive
• Disassemble the air conveyor (volute) (026003).
'LVDVVHPEOLQJWKHEUDNHERRVWHU1. Empty the reservoir ( A-Fig.1)(061107) .
2. Disconnect the pipe ( B-Fig.2).
3. Disconnect the 2 pipes ( C-Fig.1).
4. Disconnect the wiring harness ( D-Fig.1).
5.  5HOHDVHWKH¿[LQJSLQ E) and remove the pin locking the brake booster to the pedal cluster ( F-Fig.3).
6. Unscrew the brake booster’s 2 stay-bolts ( G-Fig.2).
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C) Vacuum sensor D) Disassembling the pan ( 'LVDVVHPEOLQJWKHEUDNHYDFXXPSLSH

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During braking the ABS function allows the modulation of the braking force effectively applied to each wheel, thus preventing one or more wheels from becoming blocked, which would otherwise cause the loss of control of the vehicle.
The control unit carries out the corrections to the braking by reading the relative speed of each wheel, obtained by special sensors (pick-up).
To guarantee a good signal quality, the distance between the pick-up and the phonic wheel must be between 0.9
÷ 1.0 mm. The electro-hydraulic control unit carries out all the corrections on the braking, using 4 ISO valves and 4
DUMP valves. When an ISO valve is closed, the disc brake calliper is isolated from the hydraulic pump.
The DUMP valve, on the other hand, is used to reduce the pressure of the corresponding disc brake calliper that
is present in the hydraulic circuit. If, during normal use of the vehicle, the ABS warning light on the dashboard is
switched on and the buzzer sounds at the same time, it means that the ABS control unit has found a fault in the
system. When the warning light is on the ABS does not work; this means that in the vehicle the braking system works
anyway, but the electronic control on the braking is deactivated. $%6V\VWHPYDFXXPUHFRYHU\SXPS
The electric vacuum recovery pump is positioned in the front bumper area and is controlled by the MASTER engine injection control unit only with the engine running.
Its operation is determined by a pressure sensor that calculates its drop and makes the pump cut in to maintain the vacuum. Its operation can be checked by means of the LaRa-AS engine control unit “01” Basic setting 8 (109000).

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%UDNHVZLWFKDGMXVWPHQW It is located inside the passenger compartment, where it is mounted on to the pedal cluster on a bracket.
The adjustment of this component is critical, ensure that the switch is open when the pedal is at rest position. Simply check whether or not the brake lights are on.
If the switch is incorrectly adjusted or damaged, the control unit acknowledges the situation by generating the relative error message: stuck or inoperative brake switch.
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A. Brake/ABS switch
B. Pedal
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$ 'LVDVVHPEOLQJWKH$%6FRQWUROXQLW 3UHOLPLQDU\RSHUDWLRQV •Disassemble the luggage compartment (080603).
'LVDVVHPEOLQJWKHFRQWUROXQLW 1. Disconnect the main connector ( $)LJ).
2. Disconnect the 6 pipes ( %)LJ) connected to the control unit.
3. Remove the 2 screws ( &)LJ) that secure the control unit to the bracket.
4. Prize the control unit mounting bracket and the aluminum part.
5. Remove the control unit.
If it is necessary to replace the ABS system electro-hydraulic unit, to assist tracing the required part use the number stamped on the hydraulic unit and on the electronic unit plate. 5LJKWKDQGGULYH
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The ABS brake circuit is grouped as follows (
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A1. Brake booster pump front connection pipe
A2. Brake booster pump front connection pipe
A3 Right rear brake calliper front connection pipe
A4 Right front brake calliper front connection pipe
A5. Left rear brake calliper front connection pipe
A6. Left front brake calliper front connection pipe
3 Right rear brake calliper rear connection pipe
3 Left rear brake calliper rear connection pipe /HIWKDQGGULYH
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Raise the vehicle on the car lift (000000).
• Remove the wheels (060103).
• Disassemble the luggage compartment tray (080603).
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1. Unscrew the nuts ( %)LJ) securing the pipes to the ABS control unit.
2. Remove ABS pipes A1and A2()LJ )LJ ) by unscrewing the nuts ( &)LJ) securing them to the brake
booster pump.
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3.
Remove ABS pipes A3and A4by unscrewing the nuts securing them to the corresponding connections with
the right rear brake calliper ( ')LJ) and the right front brake calliper ( ()LJ).
4. Remove ABS pipes A5and A6by unscrewing the nuts securing them to the corresponding connections with
the left rear brake calliper ( ))LJ) and the left front brake calliper ( *)LJ).

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5($53$57 3UHOLPLQDU\RSHUDWLRQV • Raise the vehicle on the car lift (000000).
• Empty the engine coolant tank (012107).
• Remove the wheels (060103).
• 'LVDVVHPEOHWKHIURQWFHQWUHDQGUHDUYHKLFOHÀRRUV (082503).
• Disassemble the propeller shaft (030703).
• Disassemble the front differential ).
'LVDVVHPEOLQJWKH$%6SLSHV 1. In the front section of the vehicle, unscrew the nuts ( $)LJ) securing front ABS pipes A3and A5to rear ABS
pipes 3and 3.
2. For right pipe 3, disconnect the battery positive pole ( %)LJ) and release the engine cooling pipe ( &)LJ).
3. Remove right ABS pipe 3by unscrewing the nut ( ')LJ) securing it to the right rear brake calliper.

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4.
For left pipe 3, release the engine cooling pipes ( ()LJ E\XQVFUHZLQJWKHVL[¿[LQJVFUHZV ))LJ).
5.  ,QWKHUHDUSDUWRIWKHFHQWHUFRQVROHORRVHQWKHVFUHZVHFXULQJWKHFODPS¿[LQJSLSH 3to the chassis.
6. Remove left ABS pipe 3by unscrewing the nut ( *)LJ) securing it to the left rear brake calliper.

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