2009 LAMBORGHINI MURCIÉLAGO sensor
[x] Cancel search: sensorPage 363 of 1173
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® Automobili Lamborghini S.p.A.
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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pressure sensor assembly
1. Tighten the two nuts ( A-Fig.1) that secure the sensor ( B-Fig.1).
2. Connect the connector ( C-Fig.1).
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Fig.2
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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The canister is connected, by means of two solenoid valves, to two pipes that convey the vapors to the engine intake
manifolds. With the engine running, each solenoid valve is piloted in duty-cycle by the engine control unit according
to engine speed and load, thus putting the canister into communication with the intake manifold and allowing the
suction of the vapors inside the canister. At high engine speed, a venting valve (VISTON valve), connecting the
F D Q L V W H U W R W K H D W P R V S K H U H E \ P H D Q V R I D Q D G H T X D W H D L U ¿ O W H U S U H Y H Q W V W K H F D Q L V W H U L P S O R V L R Q W K D W F D Q E H F D X V H G by the engine vacuum.
The fuel vapor sensor generates a OBDII error in case of not controlled fuel vapor emission (not pressurized tank with leakage from the pipes or plug missing).
Fuel anti-evaporation system layout (Fig.2)
A. Fuel vapors pressure sensor
B. Floating valve
C. Fuel tank
D. Right suction fuel vapor inlet E. Left suction fuel vapor inlet
F. Venting valve (VISTON)
* $ L U ¿ O W H U I R U F D Q L V W H U Y H Q W L O D W L R Q H. Canister
I. Solenoid valves
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![LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual 1
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L824 02 51 00
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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General Description The exhaust system consists of the following parts: •
Six in two in one insulated manifold;
• Single catalytic converter (EU) or with post-catalyst (USA);
• Exhaust silencer.
( [ K D X V W V \ V W H P ) L J
A. Exhaust manifold
B. CO pick-up pipe
C. Lambda sensor upstream of the catalytic converter (LINEAR)
D. Catalytic converter
E. Thermocouple outlet
F. Lambda sensor downstream of the catalytic converter
G. Post-catalyst (USA)
H. Exhaust silencer
I. Exhaust terminal
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
W K H U L J K W W R P D N H X S G D W H V D Q G P R G L ¿ F D W L R Q V 7 K H I R O O R Z L Q J D U H S U R K L E L W H G U H S U L Q W L Q J U H S U R G X F W L R Q I R U Z D U G L Q J W R X Q D X W K R U L ] H G S H R S O H D Q G R U W K L U G S D U W L H V D Q G W U D Q V O D W L R Q L Q F O X G L Q J S D U W L D O Z L W K R X W
Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
& D W D O \ W L F & R Q Y H U W H U
The catalytic converter is a device that simultaneously reduces the three main pollution components in the exhaust: Unburnt hydrocarbons (HC), carbonmonoxide (CO) and nitrogen oxides (NOx). Inside the catalytic converter two chemical reactions take place: •Oxidizing of the CO and HC, converted into carbon dioxide (CO2) and water (H2O);
• Reduction of the NOx converted into nitrogen (N2).
These reactions are possible in a very short time due to the presence inside the structure (metal block) of the
catalyst, of a layer of active substances (platinum and rhodium) that considerably speed up the conversion of the harmful substances.
7 K H H I ¿ F L H Q F \ R I W K L V F R Q Y H U V L R Q S U R F H V V K R Z H Y H U G H S H Q G V R Q W K H I D F W W K D W W K H P L [ W X U H V W U H Q J W K W K D W L V X V H G E \ W K H
H Q J L Q H F R Q W L Q X D O O \ À X F W X D W H V D U R X Q G W K H V W R L F K L R P H W U L F Y D O X H W K D W L V R E W D L Q H G Y L D W K H I H H G E D F N F D U U L H G R X W E \ W K H control unit based on the lambda sensor signals.
Moreover the conversion processes take place with temperatures over 300 to 350°C: Therefore it is essential that
the catalytic converter reaches this temperature as soon as possible so as to operate correctly.
& D W D O \ W L F F R Q Y H U W H U F K H P L V W U \ ) L J
A. Metal block
B. Metal support
C External steel wrapping
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
W K H U L J K W W R P D N H X S G D W H V D Q G P R G L ¿ F D W L R Q V 7 K H I R O O R Z L Q J D U H S U R K L E L W H G U H S U L Q W L Q J U H S U R G X F W L R Q I R U Z D U G L Q J W R X Q D X W K R U L ] H G S H R S O H D Q G R U W K L U G S D U W L H V D Q G W U D Q V O D W L R Q L Q F O X G L Q J S D U W L D O Z L W K R X W
Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
The causes of destruction of the catalyst inner part are mainly two: •Lead in the fuel, that lowers the conversion level to practically nothing (“lead poisoning”) and irreparably
damages the lambda sensor too;
• & R P S O H W H O \ X Q E X U Q W I X H O L Q W K H H [ K D X V W J D V G X H W R P L V ¿ U L Q J 7 K L V F D X V H V D Q L Q F U H D V H L Q W H P S H U D W X U H V X F K D V
to cause the melting of the metal support. As a consequence the connector must never, in any circumstances, be disconnected from the coils when the engine is running.
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2 [ \ J H Q 6 H Q V R U
It is a sensor 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 this sensor it is possible to measure the deviation from the stoichometric ratio (lambda ratio) of the air – fuel mixture sent to the cylinders.
Each cylinder bank has two oxygen sensors: one is installed on the exhaust gas inlet coupling in the catalytic converter of the exhaust system, the other on the converter outlet.
A. Pre-catalyst oxygen sensor (LINEAR)
B. Post-catalyst oxygen sensor (ON-OFF)
C. Catalyst
2 1 2 ) ) R [ \ J H Q V H Q V R U R S H U D W L R Q G L D J U D P S R V W F D W D O \ W L F F R Q Y H U W H U • 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 LDAS-32 to check the POST-catalytic converter oxygen sensors. External air Exhaust gases
Electrodes
Engine control unit
Sensor voltage
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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/ , 1 ( $ 5 R [ \ J H Q V H Q V R U R S H U D W L R Q G L D J U D P S U H F D W D O \ W L F F R Q Y H U W H U 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 LDAS-32 to check the PRE-catalytic converter oxygen sensors.
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2 [ \ J H Q V H Q V R U V G L V D V V H P E O \
pre-catalytic oxygen sensors (LINEAR)
post-catalytic oxygen sensors (ON-OFF)The oxygen sensors located on the left catalytic converter require a disassembly sequence that differs from those located on the right catalytic converter:
$ 2 [ \ J H Q V H Q V R U V R Q U L J K W F D W D O \ W L F F R Q Y H U W H U 3 U H O L P L Q D U \ R S H U D W L R Q V • Remove the silencer safety grid (025103).
Sensor disassemble
1. Disconnect the two oxygen sensors (A-Fig.1).
% 2 [ \ J H Q V H Q V R U V R Q O H I W F D W D O \ W L F F R Q Y H U W H U 3 U H O L P L Q D U \ R S H U D W L R Q V Q H F H V V D U \ R Q O \ I R U U H P R Y L Q J W K H S R V W F D W D O \ W L F F R Q Y H U W H U R [ \ J H Q V H Q V R U • Lift the vehicle on the car lift (000000).
• Remove the left rear wheel (060103).
• Remove the stone-guard of the left rear wheel (082103).
Sensor disassemble
1. Disconnect the two oxygen sensors (B-Fig.2). The pre-catalytic converter oxygen sensor can be directly
disconnected from the hood; the post-catalytic converter oxygen sensor, rather, requires the removal of the left
rear stone-guard and wheel.