wheel LAMBORGHINI GALLARDO 2009 Workshop Manual

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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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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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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. Tighten the nuts ( ))LJ) securing the ABS pipes to the ABS control unit.
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• Assemble the luggage compartment tray (080605).
• Assemble the wheels (060105). /HIWKDQGGULYH
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4. Position right ABS pipe 3by tightening the nut ( ')LJ) securing it to the right rear brake calliper.
5. For right pipe 3, connect the battery positive pole ( ()LJ) and secure the engine cooling pipe ( ))LJ).
6. Nella parte anteriore della vettura avvitare i dadi ( *)LJ FKH¿VVDQRLWXEL$%6DQWHULRUL A3eA5 ai tubi ABS
posteriori 3e3 .
• Fill the engine coolant circuit (012107).
• Assemble the front differential  .
• Assemble the propeller shaft (030705).
• $VVHPEOHWKHIURQWFHQWUHDQGUHDUYHKLFOHÀRRUV (082505).
• Assemble the wheels (060105).

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The technical data regarding the pads can be found in chapter 060000.
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Remove the brake caliper (060703)and the parking brake caliper (060203).
'LVDVVHPEOLQJWKHUHDUEUDNHGLVN1. Unscrew the centering screw ( A-Fig.1).
2. Remove the brake disk.
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Release the brake caliper (060703).
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Put the car on a car lift (000000).
• Remove the wheel (060103).
• Disconnect the connector for the pads (060703).
'LVDVVHPEOLQJ67$1'$5'EUDNHSDGVIURPFDOLSHUV 1. Remove the 2 pins ( A-Fig.3) from the caliper.
2. Use a pliers to remove the pads from their seat.
'LVDVVHPEOLQJ&$5%21&(5$0,&EUDNHSDGVIURPFDOLSHUV 1. Unscrew and remove the pin ( %)LJ) from the caliper.
2. Remove the retaining springs ( C-Fig.4) from the calliper.
3. Remove the bracket ( d-Fig.4) from the caliper.
4. Use a pliers to remove the pads from their seat.
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• Remove the rear wheel (060103).
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1.  $FWRQWKHVSHFL¿FVFUHZ A-Fig.5) to zero set the automatic backlash device.
2. Use a pair of pliers to release the parking brake cable ( %)LJ).
3.
Remove the 2 pins ( C-Fig.7) from the caliper.
4. Remove the spring ( ')LJ) from its housing.

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