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Digital Radio Signal Circuit Malfunction

  1. Ignition OFF, disconnect the X2 harness connector at the radio.
  2. Radio ON, test for 5.0-7.5 volts between the signal circuit terminal 1 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DRR.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DRR.
  3. Test for 5.0-7.5 volts between the signal circuit terminal 2 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DRR.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DRR.
  4. Test for 5.0-7.5 volts between the signal circuit terminal 9 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DRR.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DRR.
  5. Test for 5.0-7.5 volts between the signal circuit terminal 10 and ground.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the DRR.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the DRR.
  6. If all circuits test normal, replace the radio.
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