2010 ASTON MARTIN V8 VANTAGE fuel cap

Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-7
Normal Fuel Fill - Air displaced from the fuel tank during
filling can only exit via the fuel level vent valve and roll over
valves and be forced through the carbon canister. Any fuel
vapour in the displaced air is absorbed in the carbon filter
material. No fuel vapour can escape to the atmosphere.
Clean air then exits the carbon canister, via and additional
filter, to atmosphere.
Excessive Fuel Fill - In the event of overfilling of the fuel
tank, the fuel level vent valve will close at normal maximum
fuel level. Finally the roll over vent valve will close,
completely sealing the tank. Any excess pressure in the fuel
tank will ‘blow off’ via the Ov er-pressure vent valve (part of
the roll over vent valves) in the Fuel Level vent valve
assembly.
Safety Precautions
Operations on fuel system resu lt in fuel liquid and vapour
being present in the working environment. This presents a
very serious risk and the following precautions must be
strictly observed:
Specifications
Warning
Operations on refuelling and the fuel system must only
be performed by personnel who have completed training on fuel handling.
Warning
Smoking must not be allowed near the working area. “NO SMOKING” signs must be posted around the
working area.
Warning
Any operation which could involve sparks or naked lights (e.g. battery testing, welding, metal grinding,
etc.) must not be allowed near the working area.
Warning
A CO2 fire extinguisher must be available close at hand.

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Warning
Dry sand must be available close at hand to soak up any accidental fuel spillage.
Warning
If necessary, empty the fuel into an explosion proof container using suitable fireproof fuel handling
equipment.
Warning
The working area must be well ventilated.
Warning
Disconnect the battery before commencing work on the fuel system.
Warning
Depressurise the fuel system before disconnecting any fuel lines.
Pump Pressure
Nominal pump pressure 40 psi (2.7 bar) above inlet
manifold pressure.
Torque Figures
DescriptionNmlb. / ft.
Tank retaining plate bolts 20-25 15-18.5

Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-11
Fuel Tank and Canister Assembly-Renew
Removal
1. Disconnect vehicle battery.
2. Remove rear subframe (see Workshop Manual procedure 02.01.CA Subframe Assembly - Rear -
Remove for Access and Refit).
3. Remove fuel filler cap.
4. Remove bolt filler pipe bracket to spring damper
assembly.
5. Remove nut filler neck pipe and hose to body.
6. Release filler neck pipe and hose, collect sealing washer.
7. Remove filler neck pipe and hose assembly from the tank (using filler neck disc onnection tool - 310 - 134)
(see Fig. 2). 8. loosen jubilee clip and disconnect hose from
evaporative emission contro l assembly (see Fig. 3).
9. Disconnect fuel tank harness from main harness (see Fig.
4).
10. Remove nut and release earth lead from stud (see Fig. 5).
Repair Operation Time (ROT)
Warning
Read and follow all fuel hand ling instructions (at the
beginning of the Fuel System section) and the fuel
bowser manufacturers fuel handling documentation
before commencing work on the fuel system. Clean up
spillages immediatel y and dispose of fuel contaminated
materials safely.
Warning
Fuel vapour is explosive. During the following
procedure, fuel tank and fuel lines will be open. Ensure
good ventilation and take all necessary precautions to eliminate fire risk.
Warning
Fire Risk. Before commencing work on the vehicle fuel system, disconnect the earth ( - ve) lead from the
vehicle battery.
Fig. 2
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Fig. 3
Fig. 4
Fig. 5
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Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-13
22. Remove cable tie carbon canister to bracket (see Fig. 11).
23. Remove carbon canister from fuel tank (clips 4) (see Fig. 12)
24. Remove tank from support plate.
Installation
1. Position tank to support plate.
2. Install new cable tie behind carbon canister bracket.
3. Align and secure carbon canister to clips (x4).
4. Tighten cable tie around carbon canister.
5. Connect multiplug (x1) fuel tank harness.
6. Install nut (x1) fuel tank harness earth.
7. Secure fuel tank harness (clips x5).
8. Connect fuel vapour hose quick fit connection to tank.
9. With assistance position tank and secure with bolts (x14)
10. Install vacuum hose clip to tank bolts / studs (x4)
11. install vacuum hose clips to studs and secure vacuum
hose.
12. Install nuts (x5) oil cooler to body.
13. Install heatshield. 14. Connect vapour purge and fuel pipe to tank.
15. Position earth lead and secure with nut.
16. Connect fuel tank harness to main harness.
17. Connect evaporative emis
sion control assembly hose
and secure with jubilee clip.
18. install filler neck pipe and hose assembly to fuel tank.
19. Position filler neck pipe, hose assembly and sealing washer to body.
20. Install nut filler neck pipe and hose assembly to body.
21. Install bolt filler pipe brac ket to spring damper assembly.
22. install fuel filler cap
23. Install rear subframe (see Workshop Manual procedure
02.01.CA Subframe Assembly - Rear - Remove for
Access and Refit).
24. Connect vehicle battery.
Fuel Tank and Canister Assembly-
Remove for Access/Refit
Removal
1. Disconnect vehicle battery.
2. Remove rear subframe (see Workshop Manual procedure 02.01.CA Subframe Assembly - Rear -
Remove for Access and Refit).
Fig. 11
Fig. 12
Warning
The fuel tank is heavy. Fuel tank removal / replacement
is a two person operation.
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Warning
Fire Risk. Do Not connect the vehicle battery and
switch on the ignition until all work on the fuel system
is completed and the area is cleared of fuel
contamination.
Remove contaminated material, open fuel containers
and waste fuel. Fully ventilate vehicle and work area to remove all fuel fumes.
Warning
Fire Risk. Do Not start the en gine until the fuel system
integrity is confirmed.
Repair Operation Time (ROT)
Warning
Read and follow all fuel hand ling instructions (at the
beginning of the Fuel System section) and the fuel
bowser manufacturers fuel handling documentation
before commencing work on the fuel system. Clean up
spillages immediately and dispose of fuel contaminated materials safely.
Warning
Fuel vapour is explosiv e. During the following
procedure, fuel tank and fuel lines will be open. Ensure
good ventilation and take all necessary precautions to eliminate fire risk.
Warning
Fire Risk. Before commencing work on the vehicle fuel system, disconnect the earth ( - ve) lead from the
vehicle battery.

Fuel Tank and Lines (10.01)
Fuel (10.00)10-1-14 Workshop Manual May 2007
3. Remove fuel filler cap.
4. Remove bolt filler pipe bracket to spring damper
assembly.
5. Remove nut filler neck pipe and hose to body.
6. Release filler neck pipe and hose, collect sealing washer.
7. Remove filler neck pipe and hose assembly from the
tank (using filler neck disc onnection tool - 310 - 134)
(see Fig. 2).
8. loosen jubilee clip an d disconnect hose from
evaporative emission control assembly (see Fig. 3). 9. Disconnect fuel tank harness from main harness (see
Fig. 4).
10. Remove nut and release earth lead from stud (see Fig. 5).
11. Disconnect vapour purge and fuel pipe from the tank
12. Remove bolts (x4) exhaust heatshield to floor.
13. Remove nuts (x5) oil cooler pipes to body.
14. Release exhaust vacuum pipe from clips.
15. Remove vacuum hose clips from studs.
16. Remove vacuum hose clip bolts/stud (x4) tank to body.
Fig. 2
Fig. 3
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Fig. 4
Fig. 5
Warning
The fuel tank is heavy. Fuel tank removal / replacement is a two person operation.
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Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-15
17. With assistance support tank, remove bolts (x14) tank to body and remove fuel tank (see Fig. 6).
Installation
1. With assistance position tank and secure with bolts (x14)
2. Install vacuum hose clip to tank bolts / studs (x4)
3. install vacuum hose clips to studs and secure vacuum hose.
4. Install nuts (x5) oil cooler to body.
5. Install heatshield.
6. Connect vapour purge and fuel pipe to tank.
7. Position earth lead and secure with nut.
8. Connect fuel tank harness to main harness.
9. Connect evaporative emission control assembly hose and secure with jubilee clip.
10. install filler neck pipe and hose assembly to fuel tank.
11. Position filler neck pipe, hose assembly and sealing washer to body.
12. Install nut filler neck pipe and hose assembly to body.
13. Install bolt filler pipe bracket to spring damper assembly.
14. install fuel filler cap
15. Install rear subframe (see Workshop Manual procedure 02.01.CA Subframe Assembly - Rear - Remove for
Access and Refit). 16. Connect vehicle battery.
Fuel Tank Sender Assembly-Renew
Removal
1. Disconnect battery earth lead.
2. Release and remove luggage compartment rear floor
carpet.
3. Remove luggage compartment front floor carpet retainers (x6) and remove carpet.
4. Remove fuel tank cover, clean off the sealant around the aperture.
5. Remove nuts (x7) and release plate clamp and fuel tank service cover.
Fig. 6
Warning
The fuel tank is heavy. Fuel tank removal / replacement
is a two person operation.
Warning
Fire Risk. Do Not connect the vehicle battery and
switch on the ignition until all work on the fuel system
is completed and the area is cleared of fuel
contamination. Remove contaminated material, open fuel containers
and waste fuel. Fully ventilate vehicle and work area to remove all fuel fumes.
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Warning
Fire Risk. Do Not start the en gine until the fuel system
integrity is confirmed.
Repair Operation Time (ROT)
Warning
Read and follow all fuel hand ling instructions (at the
beginning of the Fuel System section) and the fuel
bowser manufacturers fuel handling documentation
before commencing work on the fuel system. Clean up
spillages immediately and dispose of fuel contaminated materials safely.
Warning
Fuel vapour is explosiv e. During the following
procedure, fuel tank and fuel lines will be open. Ensure
good ventilation and take all necessary precautions to eliminate fire risk.
Warning
Fire Risk. Before commencing work on the vehicle fuel system, disconnect the earth ( - ve) lead from the vehicle battery.
Warning
Ensure there is adequate ventilation inside the vehicle
(i.e. place the vehicle in a well ventilated area, with the windows open).
Caution
The following procedure is completed inside the vehicle
cabin area. Extra care must be taken to ensure no fuel or
fuel vapours come into contac t with the vehicle interior.

Fluids/Capacities
Appendix & Glossary
May 2007 Workshop Manual 20-1-3
Fluids/Capacities
Terms
Frequently used alternative names or spellings for vehicle
components mentioned in this Workshop Manual.
Capacities
Europe UK USA
Engine sump (incl. filter) 9 .5 litres 16.7 pints 10.0 Qts
Engine sump (excl. filter) 8 .5 litres 15.0 pints 9.0 Qts
Engine cooling system 12 litres 21 pints 14.4 Qts
Screen washer reservoir 2.0 litres 3.5 pints 2.2 Qts
Gearbox & Cooler 4.7 litres 7.9 pints 5.6 Qts
Final drive 2.0 litres 3.5 pints 2.2 Qts
Fuel tank 80.0 litres 17.6 galls 88.0 Qts
Recommended Fluids
Engine oil (Initial fill) Castrol Edge Sport 10w60
Do not mix Engine oil with any mineral oils.
Engine coolant 50% water, 50% OAT Coolant (Arteco Havoline XLC only)
Do not mix OAT coolant with any glycol based anti-freeze.
Gearbox oil Shell Transaxle Oil 75w90
Final drive oil Mobil 1 80w140
Brake fluid Castrol Super Response DOT4
Power steering fluid Esso Power steering Fluid
A/C Refrigerant R134A (HFC134A)
A/C Compressor oil ND8
UK EnglishUS English
Bonnet Hood
Boot Trunk
Brake Disc Rotor
Handbrake Parking Brake
Petrol Gasoline
Tyre Tire
Wing Fender
Windscreen Windshield
Sill Rocker Panel

AML EOBD System Operation Summary

Rory O’Curry Aston Martin Lagonda CONFIDENTIAL 1 May 2009
[email protected] AML EOBD Monitors 07 ROC.doc Page 4 of 43

Catalyst Efficiency Monitor

The Catalyst Efficiency Monitor uses an oxygen sensor before and after the catalyst to infer Hydrocarbon
conversion efficiency, based on oxygen storage capac ity. Under normal closed-loop fuel conditions, high
efficiency catalysts have significant oxygen storage, which makes the switching frequency of the rear
HO2S quite slow compared with the switching freque ncy of the front HO2S. As catalyst efficiency
deteriorates, its ability to store oxygen declines and the post-catalyst HO2S signal begins to switch more
rapidly, approaching the switching frequency of the pre-catalyst HO2S.

In order to assess catalyst oxygen storage, the monitor compares front and rear HO2S signals during
closed-loop fuel conditions after the engine is warm ed-up and inferred catalyst temperature is within
limits. Front H02S signals are accumulated in up to ni ne different air mass regions or cells although 3 air
mass regions is typical. Rear H02S signals are counted in a single cell for all air mass regions. Currently
there are two algorithms that can be used to compare the front and rear HO2S signals:

1. Switch Ratio method;
The Switch Ratio method compares the 'switch frequencies' of the front and rear HO2S sensors. A
'switch' is counted every time the HO2S voltage output passes through a defined threshold (0.45 V).
The catalyst condition is diagnosed by dividing the number of rear H02S switches by the number of
front HO2S switches.

2. Index Ratio method.
The Index Ratio method calculates and compares the length of the front and rear HO2S signals. The
catalyst condition is diagnosed by dividing the length of the rear HO2S signal by the length of the front
HO2S signal.

A Switch / Index Ratio near 0.0 indicates high oxygen storage capacity, hence high HC efficiency. A
Switch / Index Ratio near 1.0 indicates low oxygen storage capacity, hence low efficiency. To improve the
robustness of the monitor, the Switch / Index Ratio is calculated using an Exponentially Weighted Moving
Average (EWMA) algorithm. If the Switch / Index Ratio exceeds the threshold, the catalyst is considered
failed.

AML EOBD System Operation Summary

Rory O’Curry Aston Martin Lagonda CONFIDENTIAL 1 May 2009
[email protected] AML EOBD Monitors 07 ROC.doc Page 23 of 43
SAIR System Monitor – Flow Check

When the air pump is energized, the MAF sensor will show a corresponding increase in airflow. The
SAIR pump flow check monitors the MAF sensor signal and two air flow models during normal
secondary air system operation to determine if secondary air is being delivered into the exhaust system.
The SAIR pump flow test compares the actual change in MAF during the pump on and off transitions to
the expected change in airflow from the secondary air fl ow model. (A throttle body flow model is used to
"zero out" errors in the air meter and to compensate fo r transient driving conditions.) The actual airflow is
divided by the expected airflow to calculate an "On flow ratio" and an "Off flow ratio".

A flow ratio that is much less than 1.0 means that the air pump has no/low flow, or the inlet hose to the
pump is disconnected. If secondary air system operation ex tends into closed loop fuel, fuel trim feedback
is used to discriminate between low pump flow and in let hose disconnection. A low flow ratio with a lean
fuel system indicates a disconnected inlet hose. A flow ratio significantly higher than 1.0 (and/or a rich
fuel system indication) indicates that th e outlet hose from the pump is disconnected.

SAIR Diagnostic


The V8 uses the standard FORD non-intrusive monitor that has been adapted for use on a V-engine. The
detection capability is detailed below with the V8 specific modifications highlighted

P0410 - Pump inlet hose disconnection.

P0491 - Low airflow into the exhaust on Bank1. Blocked hose OR failed to open vacuum valve.

P0492 - Low airflow into the exhaust on Bank 2. Blocked hose OR failed to open vacuum
valve.

P2448 - Low airflow into the exhaust on Bank1. Disconnected outlet hose.

P2449 - Low airflow into the exhaust on Bank 2. Disconnected outlet hose.

P0412 - SAIR electrical circuit fault high/low on ecu control pin.

P2257 - SAIR electrical circuit fault high on monitor pin.

P2258 - SAIR electrical circuit fault low on monitor pin.

The determination of which bank is receiving low ai rflow is performed by monitoring the closed loop
fuelling correction supplied from the oxygen sensors. The bank that has the highest enleaning correction is
the bank that has the lowest SAIR flow. If closed loop fuelling is not active when the SAIR pump is
disabled the diagnostic cannot determ ine which bank is receiving low flow and so a fault on both banks is
raised.

The relative difference between the commanded lambda values for each bank is used to determine a
restricted flow to either bank1 or 2 due to a restricted outlet. This enables P0491, P0492 to be raised if the
flow ratio is calculated as in range.

The SAIR functional tests run when SAIR is active and the results are stored until the HEGO monitor has
completed (150-200 seconds after SAIR is off on a typical FTP74). It is only when the HEGO monitor has
completed successfully that any functional SAIR fa ults and SAIR monitor complete is reported.