B2462

CIRCUIT DESCRIPTION
The GPS antenna is connected to the VIU with a RG-174 coax cable. The VIU polls the data from the GPS antenna every 2.5 seconds.

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 2.5 seconds.

CONDITIONS FOR SETTING THE DTC
^ The VIU does not detect a GPS signal.
^ All the above conditions are present for greater than 2.5 seconds.

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 VIU detects the presence of a GPS antenna.
^ A history DTC clears after 50 malfunction free ignition cycles.
^ The VIU receives the clear DTC command from the scan tool.

TEST DESCRIPTION

Steps 1-7:

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step tests for proper ground on the GPS antenna.
3. This step tests the condition of the GPS antenna.