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:
Map Coverage
The navigation system provides map
coverage for the contiguous United States,
Alaska, Hawaii, Canada, and Puerto Rico.
The map coverage consists of accurately
mapped (verified) metropolitan area ...
HandsFreeLink System Description
HandsFreeLink Control Unit Connector for Inputs and Outputs
...
Engine Compression Inspection
NOTE: After the inspection, you must reset the ECM/PCM. Otherwise, the
ECM/PCM will continue to stop the injectors from operating.
Allow the engine to reach operating temperature (fan comes o ...