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Home >> Chevrolet >> 2009 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 913 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1259 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the antenna coax from the DRR. Connect the EL-48028  to the DRR.
  2. Radio ON, tuned to XM, verify DTC B1259 is not set as current.
    • If the DTC is current, replace the DRR.
  3. Ignition OFF, disconnect the digital radio antenna coax from the digital radio antenna.
  4. Ignition ON, test for less than 1 volt between the antenna coax center terminal and ground.
    • If greater than the specified range, replace the antenna coax.
  5. Test for infinite resistance between the antenna coax center terminal and ground.
    • If less than the specified value, replace the antenna coax.
  6. Test for less than 5 ohms of resistance on the antenna coax center circuit from end to end.
    • If greater than the specified range, replace the antenna coax.
  7. Test for infinite resistance between the coax center terminal and the outer shield.
    • If less than the specified value, replace the antenna coax.
  8. If all circuits test normal, test or replace the digital radio antenna.
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