B2484

CIRCUIT DESCRIPTION
The Navigation Antenna is connected to the Vehicle Communication Interface Module with a RG-174 coax cable. The Vehicle Communication Interface Module polls the data from the Navigation antenna once every second.

CONDITIONS FOR RUNNING THE DTC
^ The ignition must be in the RUN or ACC position.
^ The system voltage is at least 9.5 volts and no more than 15.5 volts.
^ All the above conditions are present for greater than 1 second.

CONDITIONS FOR SETTING THE DTC
^ The Vehicle Communication Interface Module does not detect a Navigation signal.
^ All the above conditions are present for greater than 1 second.

ACTION TAKEN WHEN THE DTC SETS
^ The OnStar(R) status LED turns RED.
^ The OnStar(R) Call Center cannot locate the vehicle.

CONDITIONS FOR CLEARING THE DTC
^ The Vehicle Communication Interface Module detects the presence of a Navigation antenna.
^ A history DTC clears after 50 malfunction free ignition cycles.
^ The Vehicle Communication Interface Module receives the clear DTC command from the scan tool.

TEST DESCRIPTION

Steps 1-6:

The number below refers to the step number on the diagnostic table.
2. This step tests the condition of the Navigation Antenna