I know for a fact that the MQB UDS requests don't work with the PQ35 platform as I have plugged my device into a VW Scirocco and it failed to return any positive UDS responses.įor the Teensy 4 I used the TI sn65hvd230 CAN transceiver on CAN1 (pins 22 and 23). I must note, on the PQ25 you most probably have a Bosch MED ECU and it's not as fast as the MQBs Continental Simos, so request poll speed might have to be lower in your case.
I then log each frame (request/response) and value.
I use a simple sketch on the Teensy that print's every CAN frame it see's (from either end: car or VCDS) onto the Arduino serial monitor. Adapter for what exactly The main connections Only thing Ive ever come across is the red and yellow often need to be swapped around and you have to make sure nothing connects to the k line. Y splitter that connects to both devices to the cars OBD port Teensy 3.2 + TI sn65hvd230 CAN transceiver placed in an OBD2 connectorģ. HEX V2 used with VCDS to send requests and see realtime dataĢ. As Tony mentioned, UDS is not easy to understand and it's not documented anywhere but it's got more enhanced data than standard OBD2 PIDs - that's why can sniffing individual PID's is the best option IMO to find what you are looking for over UDS.ġ.
