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Home >> Cadillac >> 2011 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1798 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1259 >> Circuit/System Testing
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Circuit/System Testing

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  1. Ignition OFF, disconnect the antenna coax from the DRR. Connect the EL-48028  antenna 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, reconnect the antenna coax to the DRR, disconnect the digital radio antenna coax from the digital radio antenna.
  4. Ignition ON, test for 4.5-5.5 volts between the antenna coax center terminal and the coax outer shield.
    • If not within the specified range, replace the antenna coax.
  5. If all circuits test normal, replace the digital radio antenna.
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