Hi,
There is no direct AN for MPC5746C written.
The one I wrote for MPC5744P - FCCU fault sources however can be used for most of the fault sources on other MPC57xx devices.
In reference manual the fault description is very brief and that's unfortutantelly all we offer to customer.
Of course on specific request the fault can be explained in details, but looks like there won't be any more dedicated AN for this theme.
I expect that I will do it for S32xx family devices if customers struggle with understanding.
regards,
Peter