steering LAMBORGHINI GALLARDO 2009 Repair Manual

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Assembling the power steering pump 1. Position the power steering pump ( G-Fig.3) in its housing.
2.  7LJKWHQWKH¿[LQJVFUHZV H-Fig.3) securing the pump to the engine.
Screw attachment: tightening torque ( E).
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If worn, replace the gasket on the delivery pipe.
3. Position the delivery pipe ( I-Fig.3) on the power steering pump and tighten the corresponding screw ( J-Fig.3).
Screw attachment: WLJKWHQLQJWRUTXH G 
4. Install a new clamp ( K-Fig.3) on the power steering circuit return pipe ( L-Fig.3) and tighten the clamp to fasten
the pipe to the pump.
5. Tighten the screw ( M-Fig.4) fastening the power steering circuit delivery pipe clamp to the chassis.
$IWHUDVVHPEOLQJ¿OOFRPSOHWHO\ZLWKRLO  VWDUWWKHHQJLQHDQGPRYHWKHVWHHULQJZKHHO times to the right and left to drain the system.
• Assemble the rear left wheel  .
•  $VVHPEOHWKHUHDUYHKLFOHÀRRU  .

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Replacing the power steering oil •
Lift the vehicle on the car lift (000000).
• 5HPRYHWKHOHIWUHDUFDUÀRRU (082503).
• Set up a suitable system for collecting the engine oil ( Fig.1).
1.  5HPRYH WKH GHOLYHU\ SLSH ¿[LQJ FODPS DQG GLVFRQQHFW WKH SLSH A-Fig.1  OHW DOO RI WKH RLO ÀRZ RXW DQG WKHQ
reconnect the pipe after having cleaned it.
2. Loosen the coupling ( B-Fig.2 RIWKHSRZHUVWHHULQJSXPSWDQNOHWDOORIWKHRLOÀRZRXWDQGWKHQUHWLJKWHQWKH
coupling after having cleaned it.
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Filling or topping up the power steering oil •
Remove the cap ( A-Fig.1) of the power steering oil tank ( B-Fig.1).
• Top up the oil level.
• Start the vehicle so that the liquid inside the power steering system circulates.
• Move the steering wheel as far as it will go both right and left.
• Check the power steering tank level, and top up if necessary.
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Camber
This is the wheel’s camber with respect to a plane perpendicular to the ground (
Fig.1). The camber may be positive
(the vehicle’s wheels are “open” toward the top) or negative (the wheels appear open toward the bottom). The
camber affects roadholding and driving comfort. The adjustment values were designed to obtain the best compromise between roadholding and comfort. Strut caster
This is the angle that forms the steering axis of the wheel projected on the longitudinal vertical plane with respect to
the transversal vertical plane passing through the wheel axle ( Fig.2). When this angle is positive the steering axis
meets the ground in front of the vertical axis; momentum is therefore created that tends to realign the wheels.
Toe-in
This is the angle formed between the equatorial planes of the wheels of an axle and the vertical-longitudinal plane
passing through the middle of the vehicle ( Fig.3). The angle is positive when the directions of the two wheels
converge at a point in front of the vehicle. It is negative when the point of convergence is behind the vehicle. In order
to improve vehicle stability, the toe-in of the wheels is kept positive.

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7. Detach the fastening ( G-Fig.15) securing the rear part of the pipe with the power steering circuit return pipe.
8. Loosen the screw securing the brake vacuum pump pipe mounting bracket ( H-Fig.15) to the chassis.
9 . Remove the rear part of the brake vacuum pump pipe ( I-Fig.15).

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The ESP function (Electronic Stability Program) controls the car’s dynamic behavior during fast cornering; when the
car’s speed and steering are not compatible with traction. In this situation the ESP uses the brake system and engine
torque to maintain the car’s trajectory. 7KH¿JXUHVKRZVWKHEHKDYLRURIDFDUFRUQHULQJDWDFRQVWDQWVSHHG
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1.
The driver steers, the lateral forces increase.
2. The vehicle begins to become unstable.
3. Countersteering, the driver loses control of the vehicle.
4. The vehicle becomes uncontrollable.
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1.The driver steers, the lateral forces increase.
2. The vehicle begins to become unstable. The ESP intervenes, braking the front right wheel.
3. The vehicle remains under control.
4. The vehicle begins to become unstable. The ESP intervenes, braking the front left wheel until the vehicle has been stabilized.
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7KH(63XVHVLQIRUPDWLRQSURYLGHGGLUHFWO\IURPVHQVRUV •Yaw rate and lateral acceleration; sensor located in the passenger compartment on the bench
• Steering angle; sensor located on the steering column
• Brake pressure; sensor
• Wheel speed sensors; the same as for the ABS
'DWDSURFHVVHGGLUHFWO\E\WKHFRQWUROXQLWUHFHLYHGIURPVHQVRUVLJQDOV• linear speed of the vehicle
•  ÀRDWDQJOH GLUHFWLRQRIPRWLRQZLWKUHVSHFWWRWKHORQJLWXGLQDOD[LVRIWKHYHKLFOH
• lateral forces acting on the wheels
• sideslip angle
• lateral speed of the vehicle
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brakes one or two wheels to create a yaw moment that places the car in the direction requested by the driver.
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UHÀHFWVWKHG\QDPLFEHKDYLRU ++&+LOO+ROGHU&RQWURO The ³+LOO+ROGHU&RQWURO´ ++& system helps and makes it easier for the driver to drive off going uphill.
It goes into operation when the ESP detects a change of gradient when the vehicle is running.
7KH(63WKHUHIRUHVHWVLWVHOIXSWRLQWHUYHQHGXULQJWKHXSKLOOSLFNXSLI¿UVWJHDULVHQJDJHGDQGWKHEUDNHSHGDOLV being pressed down.
In this case, the pressure of the brake calipers is kept for about 1.5 seconds after the brake pedal is released so the
driver can easily drive off pressing the accelerator pedal without the vehicle quickly backing up.
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The same is true when reverse gear is engaged. The system is activated in uphill starts (but in reverse gear), but is deactivated in downhill starts.

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3UHOLPLQDU\RSHUDWLRQV •
Disconnect the battery(091500) .
•Disassemble the driver side airbag module (088003).
• Disassemble the steering wheel (087503).
• Disassemble the steering wheel cover (087503).
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1. Unscrew the 4 screws ( $)LJ) that secure thelever control.
2. Disconnect the connector ( %)LJ).
3. Remove the
lever control(&)LJ ).

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Assembling the lHYHUFRQWUROHJHDU
1. Connect the connector ( $)LJ).
2. Screw the 4 screws ( %)LJ) that secure the
lever control(&)LJ ).
• Assemble the steering wheel cover (087505).
• Assemble the steering wheel (087505).
• Assemble the driver side airbag module (088005).
•Connect the battery(091500) .

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&KHFNLQJWKHEUDNHSHGDO )25(*($59(56,2121/< 1. Position a rod so that one end passes through near the steering wheel ( Fig.1) and the other end is positioned
on the bottom left corner of the brake pedal ( Fig.2).
2. Hold the pedal in the neutral position and mark the height at which the steering wheel is aligned on the rod.
3. Act on the brake pedal until the STOP lights switch on, and then mark the height at which the steering wheel is
aligned on the rod.
4. Measure the distance between the two marks. The pedal stroke MUST measure between 3 mm and 10 mm. If
these values do not correspond, adjust the SWITCH   .

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