GPS->VLOC Capture questions

Last 3 VOR/DME A approaches I've flown haven't switched from GPS to VLOC.  I'm not sure if this is because the criteria hasn't been met or if I had a setting/mis config.

In order to test it I was planning on going out and flying the VOR/DME A into KBAZ.  assuming that the tuned freq. matches the navaid and morse code is ID correctly then is it fair to say that if I fly the approach starting at YERRI to FAUST then at FAUST I should see it switch to VLOC automatic (assuming I have Auto-VLOC tuning [on] and GPS-<VLOC capture [auto])  

Thanks

The auto VLOC capture criteria in the latest IFD540 manual revision 7 are slightly different than listed above (primarily concerning the active leg):

Based on this, if the aircraft is within the above capture criteria crossing YERRI, the IFD should auto switch to VLOC. For testing purposes, if you select this approach as a VTF approach and FAUST is the IFD active waypoint, then once the above capture criteria are all met, the IFD should auto switch to VLOC no matter how far outside of FAUST the aircraft is.

You may want to double check your User and User settings to verify that Auto-VLOC Tuning is On and GPS->VLOC Capture is set to Auto.

It is my understanding that since YERRI and FAUST are both on the final approach course and provided the aircraft is flying along the center of that course capture criteria points 3 through 5 would be satisfied. Assuming the IFD has tuned and correctly decoded the VOR identifier (capture criteria points 1 and 2 satisfied), then upon crossing YERRI, the last outstanding capture criteria point 6 (active leg is part of the approach up to and including the FAF) will be satisfied and the IFD should automatically switch to VLOC at that point. 

In this described scenario, the IFD automatic switch to VLOC should happen long before FAUST.

I think that may be the IFD’s specific methodology in determining that the aircraft is on the front side of the approach per the older VLOC capture criteria list.