Direct access to ECU using ELM 327 key and ISO 9141
I have a VW Golf 4 which is quite old and says KWP 2000 (ISO 9141) on its CAN bus. I am using an ELM 327 dongle connected to the OBD-2 port of the car.
I am trying to send messages separately to each ECU. I tried to change the title of the messages:
AT SH 48 XX F1
(I was hoping that
would be the ECU ID;
this is a flag for "use physical addressing"). Any command I issue (eg try
for "testester present") returns
(I disabled automatic timeouts and set a maximum timeout).
Is there a way to send messages directly to the ECU? I am not interested in the data set provided via OBD-2 and I do not want to restart the ECU. At the moment I'm just trying to figure out what ECUs are available on the bus.
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