I am trying to connect to ECU EDC16U1 on a bench using CAN, I set up the protocol with AT PB C001 and AT SP B but when I send a channel configuration request message, I receve NO DATA. It is interesting because I can sniff VCDS using the AT MA command and i see requests and responses. There is no problem when I use ISO 14230-4 KWP (fast initialization), AT SH 8010F1 and reading blocks 2101 etc. works fine. What am i doing wrong? Please help me.