Hardware Configuration
The terminal resistors are mounted by default. Remove jumpers on the 2-pins headers (J9 or J14) to suppress this termination.
The default hardware configuration of the LIN block implies that two nodes are in master configuration. Only remove jumpers on the 2-pins headers (J12 or J17) to switch the node in slave configuration. Moreover, the board is by default powered by the LIN bus.
To suppress this feature, remove jumpers on the 2-pins headers (J11 or J16).