2010 ASTON MARTIN V8 VANTAGE low oil pressure

Brake Actuation System (06.06)
Brake System (06.00)
May 2007 Workshop Manual 6-6-1
Brake System (06.00)
Brake Actuation System (06.06)
Description
Tandem Master Cylinder
The short-stroke tandem master-cylinder controls two
separate brake circuits which are jointly activated by the
brake pedal. In the event of a major leak in one system, the
other will still function. The two systems are supplied by a
common brake fluid reservoir.
A pressure sensor attached to the master-cylinder provides
the ABS / DSC module with brake pressure information. This
information informs the system how hard the driver is
braking and is used as an aid for the ABS / DSC to achieve
accurate brake pressure control.
Brake Fluid Reservoir
The brake fluid reservoir is mo unted directly on the tandem
master cylinder and secured with a pin. Two stub pipes, on
the base of the reservoir, locate into the primary and
secondary chambers of the tandem master cylinder.
An integral fluid-level switch is incorporated in the reservoir.
If the brake fluid level is low, the brake warning lamp in the
Driver Information Module (D IM) will illuminate and ‘LOW
BRAKE FLUID’ will be displayed in the message center right.
Specifications
Oils/Greases
Brake Fluid Castrol Response Super Dot 4
Torque Figures
DescriptionNm.
Master Cylinder Mount 25 (+/- 4)
Brake Pipe Unions 17
Brake fluid reservoir securing pin 4
Pressure Sensor 35 (+/- 2)

Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-3
Fuel Tank
The fuel tank incorporates a single filler neck and check valve, internal fuel pump, internal fuel filter, a sender unit and an
‘on board refuelling vapour recovery’ system.
Fuel Pumps

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The modular fuel pump is immersed in the base of the fuel
tank. The pump can deliver up to 150 litres/hour. The in-
tank fuel line connects to the external line using a quick-fit
connector in the base of the fuel tank. During normal running, pressu
rised fuel from each fuel
pump passes from the tank, through an 3 micron in-tank fuel
filter to one of the two fuel rails on the engine.
Fuel temperature is measured on the primary fuel rail. If fuel
temperature becomes excessive, the fuel pressure is
increased to prevent fuel vaporisation (boiling).
Fuel pressure is measured by sensors on each fuel rail. The
fuel pressure to each rail is regulated as required by
continuously changing the run speed of the associated fuel
pump. Maximum pressure in the system is limited to 5.3 bar
by in-tank pressure regulators.
A constant head of fuel is maintained in the fuel pump
modules to ensure that the pumps cannot run dry in a ‘low
fuel’ situation.

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Steering Gear (11.01)
Steering (11.00)
Issue 5, January 2010 Workshop Manual 11-1-3
Vehicle tends to pull
to one side when
driven on a level
surface. Incorrect tyre pressure. Adjust tyre pressure.
Incorrect tyre size.
Different tyre or tread type.
New tyre as required.
Vehicle is unevenly or excessively loaded. Adjust load evenly.
Incorrect toe adjustment. Adjust as required.
Damaged front or rear suspension
components. New suspension components.
Steering gear valve effort out of balance. Shift transmission into neutral while driving at no more than 30 miles/hour (50 km/h) and turn the
ignition to position I (engine ‘Off’-coasting).
a. If the vehicle does not pull to one side with the
engine off, install a new steering gear.
b. If the vehicle drifts with the engine off, ‘cross switch’ the front wheel assemblies.
Test at low speed due to directional tyres.
a. If the vehicle pulls to the opposite side, switch the wheels that were on the rear to the same
side on the front.
b. If the vehicle pull direction is not changed, check the front suspension components and
toe adjustments.
Check front and rear brakes for correct
operation. Adjust as required.
Check for bent rear suspension components
and for damaged coil springs in the front
suspension. New rear suspension components.
Check the rear suspension for loose or worn
suspension components. Tighten.
New components.
Incorrect underbody alignment. Check underbody alignment.
Feedback (whining
or knocking noises
in the steering gear)
Condition where
roughness is felt in
the steering wheel by
the driver when the
vehicle is driven over
rough surfaces. Loose or worn tie-rods. New steering gear.
Steering gear bolts loose or damaged. Tighten.
New bolts.
Loose suspension bushing , bolts or ball joints. Tighten.
New components.
Damaged steering column.
Loose Column bolts. New steering column.
Tighten bolts.
Power steering
pump or reservoir
leaks Overfilled system. Correct fluid level.
Damaged fluid cap. New fluid cap.
Loose or damaged hose fittings. Tighten.
New hose.
Leakage at power steering pump. New power steering pump.
Poor returnability of
the steering Incorrect tyre pressure. Check
and adjust tyre pressure.
Incorrect tyre size or ty pe. New tyre as required.
Steering column universal joints binding . New steering column.
Steering column shaft floor seal may be torn
and fouling I-shaft. New floor seal as required.
Binding or damaged tie-rods. New steering gear.
Damaged or worn front suspension
components. New front suspension components as required.
Incorrect toe adjustment. Adjust as required.
SymptomPossible CauseAction

May 2007 Workshop Manual 12-1-1
Climate Control (12.00)
Contents
Body Ventilation (12.01) ...................................... 12-1-2Air Intake & Distribution System............................ 1-2 Air Intake Actuator ................................................. 1-3
Air Mix Actuator .................................................... 1-3
Airflow Mode Actuator........................................... 1-4
Heater System (12.02) ......................................... 12-2-1 Maintenance ........................................................... 2-1 RHD/LHD Heater Unit (Including ECU)-Renew...... 2-1
Air Conditioning (A/C) System (12.03) ................ 12-3-1
Major Components................................................. 3-2 Refrigerant System ................................................. 3-3
Storing Refrigerant ................................................. 3-4
Handling Insufficient Refrigerant Level ................... 3-4
Handling Compressor Oil....................................... 3-4
Refrigeration Cycle................................................. 3-4
Specifications.......................................................... 3-5 Refrigerant and Lubricant ....................................... 3-5
Capacities .............................................................. 3-5
Torque Figures ....................................................... 3-5
Diagnostics ............................................................. 3-6 Electrical Connectors.............................................. 3-6
DTC Inspection ...................................................... 3-7
Single Fault Codes.................................................. 3-7
Multiple Fault Codes .............................................. 3-8
Maintenance ........................................................... 3-9 Connections .......................................................... 3-9
Recovery................................................................ 3-9
Evacuation ........................................................... 3-10
Charging .............................................................. 3-10
A/C System Testing............................................... 3-11
Leaks ................................................................... 3-12
System Pressure Fault Classification ...................... 3-12
Maintenance ......................................................... 3-13 Condenser-Renew ............................................... 3-13
Air Conditioning Compressor-Renew ................... 3-13
Blower Assembly-Renew ...................................... 3-14
Compressor to Condenser Tube
Assembly-Renew.................................................. 3-14
Troubleshooting ................................................... 3-16

Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
12-3-4 Workshop Manual May 2007
Storing Refrigerant
Handling Insufficient Refrigerant Level
Handling Compressor Oil
Refrigeration Cycle
Operation
1. The Compressor (1) dr aws low pressure, low
temperature, refrigerant vapour from the evaporator (5)
and compresses it, raising th e refrigerant pressure and
temperature.
2. This high pressure, hot, refrigerant vapour enters the condenser (2), where it is cooled by the flow of ambient
air and changes state into a cooler, high pressure liquid.
3. From the condenser, the liqu id passes into the receiver
drier (3) which has three functions:
• Removes moisture from the refrigerant using a desiccant
• Filters the refrigerant to remove system contaminants
• Stores the refrigerant to cope with varying system refrigerant demands
4. The filtered liquid refrigerant, still at high pressure, then enters the expansion valve (4). Here it passes through a
controlled orifice and emerges as an atomised liquid
spray. This has the effect of reducing the refrigerant
pressure and temperature. The cold refrigerant spray
now flows into the evaporator (5).
5. As refrigerant passes through the evaporator core, it cools the incoming airflow. Heat is absorbed by the
refrigerant, during this process and it once again changes
state, from an atomised cool liquid into a vapour. The
refrigerant vapour then returns to the compressor for the
cycle to be repeated.
An automatic safety valve is incorporated in the compressor,
which will open if the system pressure rises above 41 bar.
The valve will reseat when the pressure drops below 27,6
bar. When the safety valve is open, the compressor will 'free
Warning
The refrigerant container is highly pressurized. If it is subjected to high heat, it could explode, scattering metal fragments and liquid refrigerant that can
seriously injure personnel. Store refrigerant at
temperatures below 40
oC (104 oF).
Caution
If an insufficient refrigerant level is detected while
troubleshooting, do not char ge (add) the refrigerant.
Because an accurate amount of refrigerant cannot be
determined from the pressure indicated on the
recovery / recycling / rechar ging unit, never charge the
refrigerant.
Caution
If there is too much or to o little refrigerant from the
refilling, there may be secondary problems such as
damage to the refrigerant cycl e parts, or a decrease of
cooling performance. Therefore, if it is determined that the refrigerant level is insufficient, completely remove refrigerant from the refriger ant cycle and refill with
refrigerant to the specified amount.
Caution
Use only ND8 compressor oil for this vehicle. Using a PAG oil other than DENSO OIL8 compressor oil will damage the A/C compressor.
Caution
Do not spill the ND8 compressor oil on the vehicle. A drop of compressor oil on the vehicle surface can
damage the paint work. If oil gets on the vehicle, wipe it off immediately.
Caution
ND8 compressor oil has a high moisture absorption
efficiency. If moisture mixe s with the compressor oil,
the refrigerant system could be damaged. Ensure caps
are installed immediately afte r using the compressor oil
or removing refrigerant system parts to prevent moisture absorption.

 
 


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Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
May 2007 Workshop Manual 12-3-9
Maintenance
Assessment of the A/C system operating efficiency and fault
classification may be achieved by using the facilities on a
Recovery / Recycling / Recharging unit.
Follow the manufacturer's instructions implicitly and observe
all safety considerations.
Connections
Only use hoses with connectors which are dedicated to
HFC 134a charge ports.
Recovery
Read manufacture’s instructions and warnings before
completing any recovery / evacuating and charging
operations.
Warning
Under no circumstances should connections be made with the A/C system in operation or valves open. Should valves be open and a vacuum pump or
refrigerant container attached, an explosion could
occur as a result of high pressure refrigerant being forced back into the vacuum pump or container.
Warning
Handling liquid refrigerant is dangerous. A drop of
refrigerant on the skin can result in localized frostbite. When handling refrigerant, wear gloves and safety
goggles. If refrigerant sp lashes into the eyes,
immediately wash them with clean water and consult a doctor.
Caution
Do not attempt to adapt this unit for R-12 as an A/C
system failure will result. Recovery / Recycle /
Recharging equipment has sp ecial connections to avoid
cross contamination wi th R-12 systems.
The A/C unit’s overfill li mitation mechanism has been
calibrated specifically for use with the 50 lb. (23 Kg)
refillable refrigerant tank.
Run the A/C system for a few minutes before starting the
recovery procedure as this wil l enable more refrigerant to
be recovered. Turn the A/C system off before starting the
procedure.
Ensure the A/C system has pre ssure in it before beginning
the recovery process; if there is no system pressure there is
no refrigerant to recover.
Ensure that the oil drain valve is closed.
Caution
The Recovery / Recycling / Re charging unit relies on a
weighing mechanism to weight the quantity of oil
removed. Ensure that the Recovery / Recycle /
Recharging unit is not disturbed during the recovery procedure.

Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
12-3-10 Workshop Manual May 2007
1. Connect an R-134a Recovery / Recycling / Recharging
unit to the vehicle A/C system.
2. Follow the Recovery / Recycling / Recharging unit manufacturer’s instructions to evacuate the A/C system.
Evacuation
The removal of unwanted air and moisture, is critical to the
correct operation of the A/C system. Moisture in the system
can be highly destructive and may cause internal blockages
due to freezing; water suspended in the lubricating oil will
damage the compressor. Once the A/C system has been
dismantled, or the refrigerant charge recovered, all traces of
moisture must be removed before charging.
Read manufacture’s instruct ions and warnings before
completing any Recovery / Recycling / Recharging
operation.
1. Connect an R-134a Recovery / Recycling / Recharging unit to the vehicle A/C system.
2. Follow the Recovery / Recycling / Recharging unit manufacturer’s instructions to evacuate the A/C system.
Charging
Read manufacture’s instruct ions and warnings before
completing any Recovery / Recycling / Recharging
operation.
1. Connect an R-134a Recovery / Recycling / Recharging unit to the vehicle A/C system.
2. Follow the Recovery / Recycling / Recharging unit manufacturer’s instructions to charge the A/C system.
Compressor oil may be drawn ou
t during this process, take
note of the quantity recovered so that it may be replaced.
It is recommended that initiall y only the high-side valve be
opened at the start of the pr ocedure. After a short time a
small depression should be seen on the low-side, at which
point the low-side valve may be opened and the evacuation
process completed. If a vacuum is not registered on the
low-side, it may indicate that the expansion valve is
permanently closed or that th e system is blocked. This
simple check may save time and effort when the system is
recharged.
Caution
Do not exceed the specificat ion when charging the A/C
system with refrigerant. Doing so will decrease the
efficiency of the A/C unit or damage the refrigeration cycle parts.
Caution
Always start the charging of refrigerant from the high-
pressure side. If charging st arts from the low-pressure
side, vanes of the A/C compressor will not be released and abnormal noise may result.

Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
12-3-12 Workshop Manual May 2007
Leaks
Faults associated with low refrigerant charge weight and low pressure may be caused by leakage. Leaks traced to
mechanical connections may be caused by torque relaxation or joint face contamination. Evidence of oil around such
areas is an indicator of leakage.
Leak Detection
Fluorescent Tracer Dye - A fluorescent tracer dye is incorporated into th e refrigeration system and can be checked for
non-apparent leaks by scanning with a high intensity ultraviolet lamp. The location of leaks can be pinpointed by the bright
yellow glow of the tracer dye.
Automatic Refrigerant Leak Detector - (various manufacturers) Hand-held, portable, battery operated leak detector.
Place in and around A/C system to detect refrigerant leaks.
System Pressure Fault Classification
This table should be used in conjunction with the graphical representations of 'High side' pressure / ambient temperature
and 'Low side' pressure / evaporator temperature. Caution
Observe ALL safety precautions associ ated with ultraviolet equipment.
If erratic or unusual gauge movements occur, check the equipment against known Recovery / Recycling / Recharging unit
gauges.
Low side
gauge readingHigh side
gauge reading
Fault
Cause
Normal Normal Discharge air initially c ool then warms up Moisture in system
Normal to low Normal As above As above
Low Low Discharge air slightly cool Refrigerant charge low
Low Low Discharge air warm Refrigerant charge very low
Low Low Discharge air slightly cool or frost build up at expansion valve Expansion valve stuck closed
Low Low Discharge air slightly cool, sweating or frost after point of restriction Restriction in High side of system
High Low Compressor noisy Defective compressor reed valve
High High Discharge air warm and high side pipes hot Refrigerant charge high or inefficient
condenser cooling due to air flow blockage or
engine cooling fans not working
High High Discharge air warm
Sweating or frost at evaporator Expansion valve stuck open