LAMBORGHINI GALLARDO 2009 Workshop Manual

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The oxygen sensors are the sensors generating an electric signal according to the ratio between the oxygen inside
the exhaust gas and the oxygen inside the outside air. By means of these sensors it is possible to measure the deviation from the stoichiometric ratio (lambda ratio) of the air – fuel mixture sent to the cylinders.A. Pre-catalyst oxygen sensor (LINEAR)
B. Post-catalyst oxygen sensor (ON-OFF)
C. Catalyst
212))R[\JHQVHQVRURSHUDWLRQGLDJUDP SRVWFDWDO\WLFFRQYHUWHU • The main element is a ceramic body coated on both sides (Nernst cell).
• The coatings act as electrodes.
• One layer of electrodes is in contact with external air, the other with the exhaust gases.
• The difference between the oxygen contained in the outside air and that in the exhaust gases generates the
sensor’s voltage.
Use LaRa-AS  on both the MASTER and SLAVE engine injection control units to check the POST-
catalytic converter oxygen sensors. External air Exhaust gases
Electrodes
Engine control unit
Sensor voltage

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/,1($5R[\JHQVHQVRURSHUDWLRQGLDJUDP SUHFDWDO\WLFFRQYHUWHU Oxygen sensor adjustment with broadband oxygen sensor: •The pumping effect of the pump cell is a purely physical process.
• No mechanical component.
• The positive voltage of the pump cell attracts negative oxygen ions through the oxygen-permeable ceramic.
Use LaRa-AS   on both the MASTER and SLAVE engine injection control units to check the PRE-
catalytic converter oxygen sensors.

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3UHOLPLQDU\RSHUDWLRQV • Raise the vehicle on the car lift (000000).
• Disassemble the engine aesthetic panels ( Engine Bay)(081303) .
• 'LVDVVHPEOHWKHDLU¿OWHUXQLW (013303).
• Disassemble the rear tyres (060103).
• Disassemble the rear wheel arches (082103).
• 'LVDVVHPEOHWKHYDFXXPWDQN (061103).
'LVDVVHPEOLQJWKHIURQWULJKWDQGOHIWR[\JHQVHQVRUV 1. Loosen the three screws ( B-Fig.1 WRUHOHDVHWKHSRZHUVWHHULQJRLOWDQN A-Fig.1).
2. Loosen eight screws ( D-Fig.1) to remove the central cross member ( C-Fig.1).
3 5HPRYHWKHVXSSRUWVIURPWKHLUFRXSOLQJVDQGGLVFRQQHFWWKHFRQQHFWRUV E-Fig.2) of the 2 front oxygen sensors
RQHSHUVLGH 
4 8QVFUHZDQGUHPRYHWKHR[\JHQVHQVRUV F-Fig.2).

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• 5HPRYHWKHDLU¿OWHUXQLW (013303).
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1.  5HPRYH WKH VXSSRUWV IURP WKHLU FRXSOLQJV DQG GLVFRQQHFW WKH FRQQHFWRUV A-Fig.1) of the 2 oxygen sensors
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properly.
$  $VVHPEOLQJWKHIURQWULJKWDQGOHIWR[\JHQVHQVRUV 1. Tighten the 2 front oxygen sensors (one each side) ( A-Fig.1).
2 . Connect the connectors ( B-Fig.1 RIWKHR[\JHQVHQVRUVDQGORFNWKHPLQWRWKHLU¿[LQJVXSSRUWV
3 . Position the central cross member ( C-Fig.2) and fasten with eight screws ( D-Fig.2).
4  )DVWHQWKHSRZHUVWHHULQJRLOWDQN E-Fig.2 XVLQJWKHWKUHHVFUHZV F-Fig.2).
•  $VVHPEOHWKHYDFXXPWDQN (061105).
• Assemble the rear wheel arches (082105).
• Assemble the rear tyres (060105).
•  $VVHPEOHWKHDLU¿OWHUXQLW (013305).
•  $VVHPEOHWKHHQJLQHDHVWKHWLFSDQHOV Engine Bay)(081305) .

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• $VVHPEOHWKHHQJLQHDHVWKHWLFSDQHOV Engine Bay)(081303) .

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