fuel pressure LAMBORGHINI GALLARDO 2009 User Guide

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%  5HDVVHPEO\KLJKSUHVVXUHIXHOSXPS 1. Reassemble the various parts of the high pressure pump ( )LJ).
1. High pressure pump
2. Nipple
3. Nipple
4. Purge Screw
2. Manually screw the purge screw ( $)LJ) on the pump.
Use a new purge screw.
3. Mannualy screw the two nipples ( $)LJ) on the pump.
Use new nipples.
• Assemble the high pressure fuel pump (Step C).
• Assemble the air intake manifold (012905).
• Assemble the Engine Bay (081305).

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C) Assembling high pressure fuel pump
It is necessary to use new spare parts for the assembly procedure. Using worn parts can damage WKHFDUVHYHUHO\
1. Spread a thin layer of oil on the grommet ( $)LJ)
2. Assemble the pump and screw the mounting screws ( %)LJ  E\ WXUQLQJ WZLFH ¿UVW RQH VFUHZ DQG WKHQ WKH
other so as to tighten them symmetrically. Continue until the two screws are completely tightened.
6FUHZLQJWKHVFUHZVWLJKWHQLQJWRUTXH E 
Screwing the screws asymettrically can cause damage to the seat or the stem of the pump.

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The anti-evaporation system prevents the fuel vapors, which consist of the lightest fractions of the hydrocarbons that form in the tank, from discharging into the atmosphere and being suctioned again to be burned.
The system operates especially when the outside temperature is high and the fuel temperature rises, thus increasing the tendency to evaporate. 2SHUDWLQJ3ULQFLSOH
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absorb them when the engine is off.7KHÀRDWLQJYDOYHKDVWKHIROORZLQJIXQFWLRQV•
It prevents the fuel from reaching the canister in the case of hard acceleration/deceleration when the car has a
full tank, or from spilling from the tank, in case the car rolls over;
• It allows the vapors to pass from the tank to the canister;
• It enables to discharge into the atmosphere any excess pressure inside the tank (electrovalve malfunctioning,
clogged pipe).
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, connecting the canister to the
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Fuel anti-evaporation system layout (Fig.1)
A. Fuel pump
B. Left fuel tank
C. Right fuel tank
D. Filter Canister
E. Diagnosis pump

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The purge valves (
A-Fig.2) empty the canister (that holds back the fuel gases that form inside the tank) positioned
on the right side of the engine compartment. 7KHWZRYDOYHVDUH¿WWHGXQGHUQHDWKWKHLQWDNHPDQLIROG ZKLFKKDVWREHUHPRYHGWRJHWWRWKHYDOYHV The purge valves are driven by the injection control units according to a strategy set by their calibration software.
In the circuit is a pump positioned under the canister that controls the system’s seal; this pump is driven according to the operating time.
The control unit receives the information if the circuit is sealed, so the more time spent loading the pressure into the tank, the greater the possibility is that the system turns on the pilot lamp.

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3.2.12.2.8.3.1.4. Evap Purge , value 7(9(6ODYH 7(9(6ODYH7(9(6ODYHP0444 P1491
open circuit
signal voltage evap purge valve
engine speed battery voltage 3 DCY
P0458 P1490 short to ground signal voltage
evap purge valve engine speed battery voltage
P0459P1489 short to battery plus signal current
evap purge valve engine speed battery voltage
Evap Purge System 7(96ODYH P0441 P1494functional check deviation lambda control
or deviation idle control ignition battery voltage engine speed engine speed deviation time after engine start
ECT
or substitute ECT
IAT
IAT @ engine start altitude3 Fahrzyl.
Fuel Pump Control Unit P025D short to battery plus signal current engine speed battery voltage 3 DCY
P025C short to ground signal voltage
P025A open circuit signal voltage
/RZ3UHVVXUH)XHO6\VWHP Sensor P2539 out of range high signal voltage
3 DCY
P2541 RXWRIUDQJHORZ signal voltage
)XHO5DLO3UHVVXUH6HQVRU HDS2, Slave P0190P018Aout of range high sensor voltage
3 DCY
HDS2, Slave P0192 P018CRXWRIUDQJHORZ
sensor voltage
)XHO5HJXODWRU9DOYH
)XHO5HJXODWRU9DOYH P2296P129Dshort to battery plus signal voltage battery voltage
valve engine relay 3 DCY
P2295 P129C short to ground signal voltage
battery voltage valve engine relay
P2294 P129B open circuit
signal voltage
)XHO5DLO3UHVVXUH&RQWURO P2293 rationality check fuel pressure regulator
et point deviationTime since start or fuel cut off
Fuel cut off3 DCY

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signal voltage 3 DCY.
P2017 P2022 out of range high signal voltage
P2004 P2005 stuck open check Difference desired-actual position Engine speed
ECT battery voltage adaption3 Fahrzyl.
P2006 P2007 stuck closed check Difference desired-actual position Engine speed
ECT battery voltage adaption
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6ROHQRLG9DOYH P2008 open circuit
signal voltageUXQQHUÀDSVengine speed battery voltage 3 DCY
P2009 short to ground signal voltage
P2010 short to battery plus signal current UXQQHUÀDSV engine speed battery voltage
Injector valves Communication CPU P062B communication check
3 DCY
,QMHFWLRQ9DOYHVHigh Pressure Fuel System cylinder #1 and #3 cylinder #4 and #5 cylinder #2 cylinder #6 and #8 cylinder #9and #10 cylinder #7 P2146 P2149P2152 P2155
P216A P216D
short to battery plus high pressure system current injection valve
ORZVLGHVLJQDOFXUUHQWengine speed battery voltage 3 DCY
cylinder #1 and #3 cylinder #4 and #5 cylinder #2 cylinder #6 and #8 cylinder #9and #10 cylinder #7 P2146 P2149 P2152 P2155
P216A P216Dshort to ground high pressure system current injection valve
engine speed battery voltage

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Engine speed QPRWCoolant temperature
WPRWOLQ Intake air temperature
WDQVOLQ Injection timeWLBO
[1/min] [°C] [°C] [ms]
min: 500
max: 7200 min: 80
max: 115min: Outside temperature
max: 115 min: 0.5
max: 6.5
)XHOSXPSDGMXVWHGDVQHHGHGGLVSOD\LQ0DVWHURQO\
- Function
04(default setting)
- Start the short trip with the “Activation” button
- Wait until ³$'3RN´LVGLVSOD\HGLQ¿HOG
Real fuel pressure SENLVWBZ Fuel pressure regulator I
SENVLDBZ EKP adaptation value
SENVDGJBZ Fuel pump status 1021
[mbar] Text
min: 4800
max: 6700 Test OFF
ADP in progress
ADP ok
ERROR
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Engine cranking tempera-
ture WPVW Cold cranking enrichment
sector 0
NVWD Cold cranking enrichment sector 1
NVWD Cold cranking enrichment sector 2NVWD
[°C] [%] [%] [%]
min: -48
max: 143 min: 0
max: 16min: 0
max: 16 min: 0
max: 16
)XHOSXPSVGLVSOD\LQ0DVWHURQO\
Fuel Rail pressure
SULVWBZEKP pulsing rate
OHSZQENVBZ Run-down time
WDEVWBZ
[bar] [%] [s]
min: 20
max: 120 min: 0
max: 8160

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Engine temperature when diagnosed
PZWKPBZReal air mass integral
GLPOH]WKP Rated air mass integral
VLPOH]WKP Result1053
[°C] [kg] [kg] Text
Test ON
Test OFF 6\VWRN
Syst. not okBreakage
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Using the IXQFWLRQ³´ , the delivery control valve is disabled and the Rail pressure is lowered to a low pressure level (for repairs on the fuel
system)
Flow control valve closing angle
GZPVYVBZ Rated Rail pressure
SUVROOBZ Real Rail pressure
SULVW Flow control valve status %BPVYRII
[°KW] [bar] [bar] min: 0
max: 220 min: 25
max: 110
,GOHYDOXH 25 min: 25
max: 120
deactivated
%BPVYRII
active %BPVYDFW
)XHOGHOLYHU\V\VWHP
High pressure system adaptation
SUGUBZ Rail pressure regulator
KGUHUUIBZ Rail pressure system status
GNYEGHBV
[bar] [mm³]
/RDGKDQGOLQJYDOYH /%. VKRUWWULSDGDSWDWLRQF\OLQGHUEDQN0DVWHU
- Engine at idle conditions
- Function 04 (default setting)
- Start the short trip with the “Activation” button
- Wait until ³$'3RN´LVGLVSOD\HGLQ¿HOG
Real position load han- dling valve, Master
OENLVWUBZ Theoretical position load
handling valve
OENVROBZ Potentiometer voltage offset value,
Master
XOENRIIVBZ Adaptation status, Master 514
[%] [%] [V] Text
min: 0
max: 100 min: 0
max: 100min: 0.3
max: 1.5 -ERRORlocked
ADP. ok
ADP. in progress

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The “12 Direct Fuel Injection DIS” group (Fig.41) indicates the parameters regarding the injection system and the
high and low pressure system.
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