Since the vantage borrowed many of its parts from other manufacturers, does anyone know if the ODB2 system was borrowed from another manufacturer or was it developed in-house?

 

Not sure but a lot of people have success with the Foxwell NT530 to read both engine and body OBDII

 

I would be astonished if AM wrote the code for their Engine Management Unit /ECM and associated OBD2. They likely got access to the firmware/code and then tuned it to their specs. The DB9 is of course a different beast/era but as a Ford based product everything derives from that worldwide supply chain. They also did as little non-recurring engineering as possible. No doubt to reduce the development uncertainty and cost (at the expense of production/maintenance costs). The best example of this is the use of 2 ECMs and 8 O2 sensors where it could be done with 4 O2 sensors. This because they saved effort fielding the system by just using two complete systems that were basically "off the shelf" from Ford. Not a criticism but just the reality of being a bespoke car manufacturer who can't afford to build their own...

 

on the mark, IMO.

manufacturers avoid one-off software like the plague for anything but the powertrain. there's nothing to be gained.

there would only be something to LOSE by doing it themselves. the OBD requirement is tied tightly to government specs and straying from them is not legal. there is likely some esoteric software company out there somewhere that is joined at the hip to the DOT. they jump everytime congress makes laws WRT OBD. then it's disseminated from there. all manufacturers buy it (it may even be a subscription service, IDK) and tweak it if necessary.

 

The majority of the electronic topology and architecture is from the Volvo P1 platform cars, and the basic OBD software structure is based around there technology (called Volcano D2 and Voodoo), but Aston did the final development themselves. Although both Ford/Visteon EEC-VI engine management and Bosch ME18.8.31 engine management systems where used, the actual software architecture that is used is, as previously mentioned, based around the Volvo criteria.