Hi Guys,
I was using an ELM 323 and a PIC Microcontroller to communicate with my 1999 Dodge Caravan. Everything worked well, however, now I am trying to write my own software to run on the PIC, but so far, no luck.
This is what I do;
1/ bring the K-line HI for 300ms then
2/ send 33hex
3/ then configure the UART module to receive @ 10.4kb/sec
but there seems to be no response at all.
So now I would like to ask if anyone could tell me what voltage level on the bus would represents a "1" and a "0". And would this be true during the;
1/ transmission of 33hex
2/ receiving the reply after the 33hex and
3/ during all other communication after Initiation
4/ does the ISO14230 have the same Bus Voltage specification as the 9141?
Should the k-line be left HI after each byte is transmitted?
Thank very much guys for your reply.