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Home >> Cadillac >> 2009 >> XLR Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> DTC B1259 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the appropriate digital radio antenna coax from the digital radio receiver (DRR). Connect the EL-48028  to the DRR. See Special Tools .
  2. Ignition ON, radio 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 appropriate 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 appropriate digital radio antenna.
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