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Circuit/System Testing

  1. Ignition OFF, disconnect the DRR antenna coax from the radio. Connect the EL-48028  to the radio and place on the roof of the vehicle. See Special Tools .
  2. Ignition ON, radio tuned to XM channel 1. Verify XM reception is improved.
    • If the reception is not improved, replace the radio.
  3. Ignition OFF, disconnect the antenna coaxial from the digital radio antenna.
  4. Ignition ON, test for 4.5-5.5 volts between the antenna coax center terminal and ground.
    • If not within the specified range, replace the antenna coax.
  5. Test for infinite resistance between the antenna coax center terminal and ground.
    • If not the specified value, replace the antenna coax.
  6. Test for less than 5 ohms end to end at the coax center conductor.
    • If greater than the specified range, replace the antenna coax.
  7. Test for less than 5 ohms end to end at the coax outer shield.
    • If greater than the specified range, replace the antenna coax.
  8. Test for infinite resistance between the antenna coax center conductor and the outer shield.
    • If less than the specified range, replace the antenna coax.
  9. If all circuits test normal, replace the digital radio antenna.
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