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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 740 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2462 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.
  1. Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.
  2. Ignition ON, test for 4.5-5.5 volts between the radio coax cable connection center conductor and ground.
    • If not within the specified range, replace the radio.
  3. If all circuits test normal, replace the GPS antenna.
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