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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 227 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2462 (OnStar/Navigation GPS Antenna) >> Circuit/System Testing >> Navigation Radio Malfunction

Navigation Radio Malfunction

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the GPS coax cable connector at the navigation radio.
  2. Connect the EL-49903  to the navigation radio; place the test antenna on the roof of the vehicle. See Special Tools .
  3. Verify the Navigation Radio functions while driving the vehicle.
    • If the navigation radio does not function, replace the navigation radio.
  4. Ignition OFF, perform the coax cable test on the coax cable between the navigation radio and the navigation antenna signal splitter, refer to Component Testing . The coax cable should pass the test.
    • If the coax cable does not pass the test, replace the T4G cellular phone, navigation, and digital radio antenna coax.
  5. If all circuits test normal, replace the navigation antenna signal splitter.
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