What is BDM and OBD read?

Tools used for ECU reading and writing

What is BDM and OBD read?

Postby peugeot01 » Wed Aug 09, 2023 9:23 am

Hello I am new to ECU tuning!

So far, I have learnt how to tune EDC16c34 and DELPHI DCM3.4... using files from this forum.

I would like to know what the difference between reading and writing with BDM is and OBD?

Why are most people using BDM instead of OBD?
What are the Disadvantages?

Also what hardware is the best to read/write for peugeot/citroen Delphi Ecus?
Same question with peugeot/citroen bosch edc16 & edc17..


thanks

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Re: What is BDM and OBD read?

Postby Shooting » Wed Aug 09, 2023 10:46 am

peugeot01 wrote:Hello I am new to ECU tuning!

So far, I have learnt how to tune EDC16c34 and DELPHI DCM3.4... using files from this forum.

I would like to know what the difference between reading and writing with BDM is and OBD?

Why are most people using BDM instead of OBD?
What are the Disadvantages?

Also what hardware is the best to read/write for peugeot/citroen Delphi Ecus?
Same question with peugeot/citroen bosch edc16 & edc17..


thanks


Your question is very strange, if you do not know then leave cars alone tbh.
OBD2 reads the ECU through a 16pin port inside the car and BDM is on the bench in the workshop.
BDM reads the whole flash and eeprom but obd only reads the maps area.




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