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bbalazs · 04-10-2008, 06:22 AM

Trying to do the similar thing on my car, I recognised, the OBD is just for MONITORING certain parameters that closely linked to the environmental pollution. Not useful to you.

BUT

Via the same connector, you are able to talk to ECUs.
These ECUs are different computers and control certain sub-functions of entire car (e.g. airbag, dash, ABS, climatisation, engine, etc.). They are also continuously communicating with each other.
The communication method they use can be e.g. CAN or ISO or PWM, etc.
They have company-specific protocol (series of hexadecimal numbers). And via these protocols, you are able to control ANY function of that ECU (maybe just after an authorisation process).
In my case, luckily, have a program DDT2000, that contains all the possible commands to any ECU.

04-10-2008, 06:22 AM	#6
bbalazs Variable Bitrate bbalazs's CarPC Specs Join Date: Jan 2007 Location: Szeged, Hungary Vehicle: 2001 Renault LagunaII 2.0 IDE Posts: 251 My Photos: ()	Trying to do the similar thing on my car, I recognised, the OBD is just for MONITORING certain parameters that closely linked to the environmental pollution. Not useful to you. BUT Via the same connector, you are able to talk to ECUs. These ECUs are different computers and control certain sub-functions of entire car (e.g. airbag, dash, ABS, climatisation, engine, etc.). They are also continuously communicating with each other. The communication method they use can be e.g. CAN or ISO or PWM, etc. They have company-specific protocol (series of hexadecimal numbers). And via these protocols, you are able to control ANY function of that ECU (maybe just after an authorisation process). In my case, luckily, have a program DDT2000, that contains all the possible commands to any ECU. __________________ Alopecia perniciosa Last edited by bbalazs : 04-10-2008 at 04:07 PM.