I recently installed a KLN89B to my panel as part of an upgrade to take my RV-7 from VFR to IFR capable.

When I am on an GPS RNAV approach, I see on my AFS-4500 that it is switching from Terminal mode to Approach mode as I near the FAF (within two miles), but as soon as I pass the fix, it switches back to terminal mode.

I've confirmed the GPS is working correctly and still in the Approach Active mode with the .3 Nmile CDI standard on the GPS. The GPS is wired to the EFIS via RS-232. Everything else is working and talking to each properly between the two.

Is there a setting on the EFIS that I need to update so that it says in approach mode on an approach?

Vince
RV-7