ops nevermind. I didnt realise I still had the VZ ecu on bench connected up to the can line. I thought the cluster was answer back to my security unlock requests. But that function is not supported by the cluster according by its return error.
The multiline functions on the ELM are a bit dicky. I have to keep re-telling the ELM that Im in full control and not to do any formatting. Otherwise it cracks the shits and doesnt do what you want.
On another note. I couldnt get my eeprom clip to get a good connection on the 93C56 chip. And struggled to get a clean read. Im unsure whether the reads were inconsistent because the board sucks out too much power.. or simply due to lack of connection. Will try again using some probe clips and see how we go from there.