Hello again guys,

On an Aston Martin DB9 Volante from 2009, how can I check fuel pressure to see if I have any?

Francis

 

The easiest way is with an OBD tool that supports Aston Martin. The Foxwell NT530 will do it as long as it has the AM license. Hook up to the powertrain OBD port, select which PCM to read codes from and find the fuel pressure. There are two complete fuel systems with two pumps in the 2009 so make sure to check both PCMs.

 

GA_DB9,

Thanks fir your input. I don't think my OBD reader is by-directional. It does support sine AM features so I will try it or will need to wait until I upgrade the tool to one like what you propose. Does your recommended OBD tool programs door buttons of the crystal key fob?

Francis

 

If you're talking about the lock/unlock functions of the key, you can do that using the ThinkDiag software.
If you're talking about starting the car, you will need the dealer to program the key.

 

Yes I'm aware of that but how do I know if the ignition part of my key is accepted by the car's various modules?

Francis

 

There's a red LED in the instrument cluster that should show you whether the PATS system in the car is happy or not. To program the remote transmitter you'll need to have the original plastic box with the seed codes. Otherwise they're of no use and you will need to obtain new fobs. That's separate from starting the car which requires a separate chip in the key to be paired with the car's PATS system.

 

So the PATS goes on as soon as the key is removed from the receptacle in the dash. The led on the clusters left's side will start a slowblink.
I will know the key is recognized once the key is back in the receptacle and the blinking red led stops blinking. At the point the PATS is allowing ignition, is that correct?

Because if that's the case, I'm in. The car is not electronically blocking the ignition on the motor. Right?

Francis

 

I have a Foxwell NT520 with the AM software. As mentioned above there are two PCMs with the DB9. I find that the pressure will be zero after a multiday period but will rapidly build to 40-55 PSI prior to starting. If you really want to be sure you can stop the top motion mid-movement, block the tonneau cover up (I use C-clamps) and then remove the tank access port. You can easily hear the pumps with the access port open. Smoking or open flames are not advised...

 

Ok that is an idea. Let me see how to get the top to work first...