2010 ASTON MARTIN V8 VANTAGE air conditioning

Power Steering (11.02)
Steering (11.00)11-2-2 Workshop Manual Issue 5, January 2010
Maintenance
Power Steering System - Bleed
Procedure
1. Do a check of the fluid level in the PAS fluid reservoir. Add fluid if necessary.
2. Start the engine and let it idle for 20 seconds.
3. Operate the steering fully to the left and then the right through three cycles.
4. Stop the engine.
5. Wait for five minutes then do a check of the fluid level in the PAS fluid reservoir again.
6. Add fluid if necessary.
7. Install the PAS fluid reservoir cap.
Power Steering Pump-Renew
Removal
1. Remove A/C compressor (see Workshop Manual procedure 03.05.BE Compre ssor - Air Conditioning -
Renew).
2. Coolant drain (see Workshop Manual procedure 03.03.AD Coolant - Drain & Refill).
3. Remove PAS fluid from reservoir.
4. Disconnect HP union from PAS pump pipe.
5. Remove bolt P-clip suction hose to body.
6. Remove bolt (x1) HP pump pipe to engine.
7. Remove bolts (x3) PAS pump to engine.
8. Disconnect bottom hose and move aside.
9. Unclip (x1) harness from cylinder head for access.
10. Manouvre pump forward and up.
11. Disconnect suction hose (cut off clip) and remove pump.
12. Remove HP union pipe from pump (mark position on
pump).
Installation
1. Install HP union pipe to pump (align correctly), fit new O-ring.
2. Install pump to vehicle connect suction pipe to PAS pump, align timing marks and fit new clip.
3. Manouvre pump into position.
4. Install bolts (x3) PAS pump to engine (torque).
5. Install bolt (x1) HP pump pipe to engine (torque).
6. Connect bottom hose.
7. Clip (x1) harness from cylinder head for access. 8. Install bolt P-clip suction hose to body (torque).
9. Connect HP union to PAS pump pipe, replace O-ring
(torque).
10. Coolant refill (see Workshop Manual procedure 03.03.AD Coolant - Drain & Refill).
11. Install A/C compressor (see Workshop Manual procedure 03.05.BE Compre ssor - Air Conditioning -
Renew).
12. Top-up PAS fluid.
13. Start and run engine, operate steering lock to lock x2.
14. Top-up PAS fluid.
Power Assisted Steering (PAS) Rack -
Remove and Install
Removal
1. Disconnect the battery ground cable.
2. Remove the front undertray (refer to Workshop Manual Procedure 01.02.NB - Front Undertray).
3. Remove the front wheels and tyres (refer to Workshop Manual Procedure 04.04.ED - Wheel and Tyre - Pair).
4. Remove the front right side wheel-arch liner (refer to Workshop Manual Procedure 01.02.GB - Front Right
Side Wheel-Arch Liner).
5. Put a container in position under the oil tank to collect oil.
6. Remove the drain plug from the oil tank.
Figure 1
7. Let the oil drain into the container.
8. Install and tighten the drain plug into the oil tank (refer to Figure 1).
9. Remove the container.
10. Lower the vehicle.
11. Remove the radiator closing panel (refer to Workshop Manual Procedure 01.02.AA - Radiator Closing Panel).
Repair Operation Time (ROT)
Repair Operation Time (ROT)
Repair Operation Time (ROT)
ItemCode
Power Assisted Steering (PAS) Rack -
Remove and Install 11.02.AA

Power Steering (11.02)
Steering (11.00)11-2-4 Workshop Manual Issue 5, January 2010
21. Remove the two top screws that attach the oil tank to the body.
Figure 8
22. Lift the vehicle.
23. Remove the four screws that attach the anti-roll bar to the front subframe.
Figure 9
24. Move the anti-roll bar away and use a cable tie to hold it.
25. Loosen the union that attaches the bottom oil pipe to the oil tank and move the pipe away.
Figure 10
26. Disconnect the two lower oil pipes from the oil tank and move them away.
27. Install sealing caps in the open ports. 28. Remove the two bottom screws that attach the oil tank
to the body.
Figure 11
29. Lower the vehicle.
30. Carefully remove the oil tank.
Figure 12
31. Lift the vehicle.
32. Remove the bolt that attaches the universal joint for the lower steering column to the pinion coupling.
Figure 13
CAUTION
Be careful when you remove the oil tank in the step that follows. If you are not, the air conditioning switch and
wiring harness can be damaged.

Power Steering (11.02)
Steering (11.00)
Issue 5, January 2010 Workshop Manual 11-2-9
20. Connect the bottom universal joint for the column to the coupling.
Figure 37
21. Move the lever on the universal joint to attach the joint to the coupling.
22. Install and torque the bolt that attaches the universal joint for the lower steering column to the pinion
coupling.
Figure 38
23. Lower the vehicle.
24. Put the the oil tank in position.
Figure 39
25. Loosely install the two top screws that attach the oil tank to the body.
Figure 40
26. Lift the vehicle.
27. Install and tighten the two bottom screws that attach the oil tank to the body.
Figure 41
28. Remove and discard the sealing plugs from the oil tank and the pipes.
29. Connect the bottom oil pipe to the oil tank and tighten the union.
Figure 42
30. Remove and discard the cable tie to release the anti-roll bar.
CAUTION
Be careful when you install the oil tank in the step that follows. If you are not, the air conditioning switch and wiring harness can be damaged.

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)
May 2007 Workshop Manual 12-3-1
Climate Control (12.00)
Air Conditioning (A /C) System (12.03)
 


 



Item
1. Condenser
2. Trinary switch
3. Compressor assembly
4. High-side charge port
5. Receiver drier 6. Low-side charge
7. Blower Unit
8. Switch, A/C Cut-Off
9. Expansion valve
10. A/C Unit

Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
12-3-2 Workshop Manual May 2007
Major Components
Compressor
• Engine mounted, driven by the accessory drive belt
• Variable displacement type
• High-pressure relief valve, to avoid system over-pressure
• ECU controlled clutch energised via a relay
Receiver drier
• Vertically mounted on the right-hand side of the engine bay
• The high-side charge port is installed to the high side entry pipe to the receiver drier
Condenser
• Multi-pass fin-over-tube type, mounted in front of the engine cooling pack and directly to the radiator
Trinary switch
Located in the compressor discharge pipe
• Provides a signal, via the A/C module, to the PCM, to disengage the compressor clutch should the refrigerant
pressure be less than 2 bar or greater than 30 bar
• Provides a hard-wired signal to the PCM, to switch the cooling fans to HIGH speed at 22 bar rising pressure and
to LOW speed at 17,5 bar falling pressure
• Provides a hard-wired signal to the PCM, to switch the radiator cooling fans to LOW speed at 12 bar rising
pressure and to switch the fans OFF at 8 bar falling
pressure
Expansion Valve
The expansion valve is located on the outside of the A/C unit
and comprises of a diaphragm, connected by a capillary
tube to a temperature sensing bulb, which regulates the
valve according to temperature variations at the evaporator
outlet pipe. This component is not serviceable.
A/C Unit

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Air Conditioning (A/C) System (12.03)
Climate Control (12.00)
May 2007 Workshop Manual 12-3-3
The A/C unit houses the evaporator, heater matrix and air
flow flaps.
The unit also incorporates two servo motor operated air
distribution flaps.
1. Regulates airflow to the cabin vents.
2. Regulates airflow to the defrost / demist air ducting.
When the cabin air flap is open, air is ducted to the cabin via
face and foot level air vents.
Condensate (water) which forms on the evaporator fins is
drained out of the unit case through a drain hose, located at
underneath / rear of the evaporator.
Refrigerant System

Warning
Do not perform a pressure test or leak test for R-134a service equipment and or vehicle A/C using
compressed air. Some mixtures of air and R-134a have
been shown to be combustible at elevated pressures.
These mixtures, if ignited, ma y cause injury or property
damage. Additional health and safety information may
be obtained from refrigerant manufacturers.
Warning
Do not allow refrigerant to leak near a fire or any kind of heat. A poisonous gas may be generated if
refrigerant gas contacts fire or heat such as from
cigarettes and heaters. When carrying out any
operation that can cause refr igerant leakage, extinguish
or remove the above mentioned heat sources and
maintain adequate ventilation.
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.
Warning
Avoid breathing A/C refrigerant or lubricant vapor.
Exposure may irritate eyes, nose and throat. Also, due
to environmental concerns , Aston Martin recommend
the use of a recovery/recycling/recharging unit when
draining R-134a from the A/C system. If accidental A/C
system discharge occurs, vent ilate the work area before
resuming service.

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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