Here is the email that I recently sent to Scosche Support. I'll post reply.
I recently purchased a Scosche FD02SR to use in the installation of a Sony xav-ax100 in my 2014 Ford Escape (with the 4.2" display and OEM backup camera).
The sony head unit powers on and the speakers work correctly. However, the steering wheel controls don't work and the backup camera don't work. I've tried unplugging lines 7 and 12 from the original 4.2" screen plug and putting them in the FR02SR to 4.2" screen plug. The backup camera works some of the time, but the image has static and isn't clear. Also, the 4.2" screen will come on in one of three states seemingly at random. 1. blue block image with temp, date, time. 2. blue block image without temp, date, time. or 3. as if the original radio is turned on, the steering wheel controls will cause a spinning circle (as if it's thinking) but nothing happens.
The wiring seemed straightforward:
Do you tie all the black wires together and yellow wires together? From the FD02SR, head unit plug and adapter plug from the OEM head unit?
Unplug the 4.2" screen and transfer the plug into the FD02SR then insert the plug from the FD02SR to the back of the 4.2" screen.
From reading online another customer posted a recommendation from a scosche customer service rep who suggested unplugging the FD02SR, close the doors, take the key out, wait 7 minutes. Then plug it all back in and start the car. This didn't seem to do anything.
Any suggestions would be appreciated.