Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Paddle Shifter (Downshift Switch) Replacement (A/T)
SRS components are located in this area. Review the SRS component locations
and the precautions and procedures before doing repairs or service.
Remove the steering ...
Intermediate Shaft Removal (A/T)
Drain the transmission fluid. Reinstall the drain plug with a new sealing
washer.
Remove the right driveshaft.
Remove the shift cable cover (A).
Re ...