Hi @Wanyj
From your other questions, I'll asume you are using the RDB2, is this correct?
I would like to discard that the boot mode is in the correct configuration
You can find this information on the following file, go to documentation and look for the user guide.
S32G-VNP-RDB2 reference design – User Guide

Help me verifying the configuration according to the chapters 3.1 Default Switch Setting and 3.6 Switch Setting for Serial Boot from the guide.
Please let me know.
Best Regards, Miguel.