Onboard Diagnostics.
Author
Discussion

delta2

Original Poster:

53 posts

233 months

Sunday 3rd June 2007
quotequote all
What exactly is onboard diagnostics and just whats it go to do with road safety?

Onboard Diagnostics is a method whereby an engine management computer uses known sensor values to replace those of a faulty sensor whilst flagging up a fault code so that you can go and get it fixed at some extortionate cost.

At present, there are at least two standards that i know of, OBD1 and OBD2.
The difference between the two is largely the degree of engine monitoring that can be performed, with obd2 being significantly more complex than its predecessor.

So what? You still havent found out what road safety and onboard diagnostics have to do with each other, well you will in a while, thats because theres a newcomer in the pipeline, OBD3.

OBD3 is going to have some superdooper functions that you just wont be able to do without, no really.
OBD3 is a proposal designed to minimise the delay between detection of an emissions malfunction by obd2 and repair of the vehicle.

Initially upon reading that i thought that it was more to do with "saving" the planet until i read a little further.

Quote:
"In the service of this, the two basic elements are the ability to read stored obd2 info form in use vehicles and the authority to direct owners of vehicles with fault codes to make immediate repair.
There are 3 proposed ways to send/receive the data: Roadside reader, local station network and satellite." Unquote.

The true nature of Onboard diagnostics3 becomes somewhat more apparent in the next quote.

Quote:" Proposed enforcement mechanisms include the following:

Incorporate into biennial i/m program (read fault code to screen for
vehicles that need complete testing, pass or short test for vehicles with no fault code).
Out of cycle inspection ( compile and screen data, mail notice to vehicle owner requiring out of cycle inspection within 10 days, require certificate of compliance on next registration/resale within 30 to 60 days, issue citation for non compliance via court or dmv (fpn) penalty at next registration, and so on).

Roadside pullover (chp flags down vehicles with fault codes, tehnician verifies problem by inspection/testing of vehicle, issuance of notice requiring out of cycle inspection etc)." Unquote.

Thats not even the half of it.
In the US the concept of OBD3 is packed with legal issues as it imposes sanctions based on "suspicionless mass surveillence" of private property.
Presumably no such issues will be allowed to impede its usage in the Uk if current practices by the scampartners and authority in general are any kind of example.

Quote:" the concept includes random, probably frequent testing. There would be no in advance knowledge of an impending test. The results of testing would not be immediately known (unless pullover follows).
There might be no opportunity to confront or rebut, and there is the possibility of the systems use for other purposes; police pursuit/immobilization, tracking and to cite speeders." Unquote.

Amazing isnt it the degree to which perversion of a totally innocuous system occurs whenever the authorities are let loose on something?

Theres very much more written in this piece regarding transponders etc to allow police to track and immobilise vehicles via the management system, all the more surprising that it should crop up in a book that primarily is about making your car very much faster/powerful using engine management tweaks and techniques.


_____________
"Safety" Scamera Partnerships;
Profitting from death and misery since 1993.

streaky

19,311 posts

280 months

Monday 4th June 2007
quotequote all
delta2 said:
"Safety" Scamera Partnerships;
Profitting from death and misery since 1993.
Love it! But it's "PRATnerships" smile - Streaky

Mr2Mike

20,143 posts

286 months

Monday 4th June 2007
quotequote all
This all sounds like a convincing argument to do the green thing and not buy new cars. That said, I suspect that legislation will eventually be passed outlawing any vehicles not fitted with big brothers wet dream...

polus

4,343 posts

256 months

Monday 4th June 2007
quotequote all
What’s wrong with - If it’s a fatal error, the engine doesn’t start. If it’s a series error the computer (like you say) uses default values and allows you to 'limp' home. If it’s a non series error then you get a warning light on the dash..... Oh... we already have that!

Ok as a ‘value added feature’ to have a system which the dealership can connect (say your car breaks down on the driveway) so as to possible find the cause and prepare for a repair may be useful but to suggest remote connection to all vehicles it is to become leg. is draconian IMO.


Edited by polus on Monday 4th June 18:35