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Home >> Cadillac >> 2009 >> STS V >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> Navigation System - Voice Recognition Inoperative >> Circuit/System Testing >> With UE1
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With UE1

  1. Ignition OFF, disconnect the X3 harness connector at the CIM.
  2. Ignition ON, test for 8.5-9.5 volts between the navigation voice signal circuit terminal 2 and ground.
    • If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
    • If greater than specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the radio.
  3. Ignition ON, test for less then 1 volt between the navigation voice low reference circuit terminal 4 and ground.
    • If greater then specified range, test for a short to voltage. If the circuit tests normal, replace the radio.
  4. Ignition OFF, test for less than 10 ohms between the navigation voice low reference circuit terminal 4 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the radio.
  5. Ignition ON, test for 8.5-9.5 volts between the navigation voice signal circuit terminal 2 and the ground.
    • If less than specified range, test the drain wire circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
  6. If all circuits test normal, replace the CIM.
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