Yes the PATS LED is fully functional and still beating out its coded messages. The LED receives a direct output from the ECU (the immobiliser resides within the ECU on my car) so it’s not processed by the MFU‘s CAN controller, however it does need it's own current limiting resistor. The LED is actually connected to the two little 2.8mm spade connectors visible in my pics, one breaking out of my switch assembly and one breaking out of my interface cable.
