Help with display
 

On my '08 Solara, I recently installed an aftermarket radio...works great but it didn't have the option of steering wheel controls. No biggie, since I rarely use those buttons....however, now my computer dash display (next to the clock) of MPG, AVG MPG, Range and AVG MPH cannot be changed...it works on ET, but I can not toggle between the other selections. I suspect there must be an electrical connection on the not now used radio terminal plug from the old radio.

Does anyone have any suggestions on how to get my display back going?
Thanks!:)

Better bring back to your installer, they must forget something.