Solution
PXI-8517 FlexRay module has 2 interface (Interface 1 and 2) on it. To form a loopback wiring connection, kindly follow the the connection as suggested in Figure 1:
Figure 1. Wiring Connection of PXI-8517 FlexRay module.
For more information regarding FlexRay pin description, please refer to
FlexRay Pinout.