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Home › Cadillac › 2009 › XLR Base › Repair and Diagnosis › Accessories & Equipment › Entertainment Systems › Cellular System, Entertainment System, And Navigation System › Diagnostic Information and Procedures › DTC B0001 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the radio harness connector X1 and ECM harness connector X1.
  2. Test the vehicle speed signal circuit for an open/high resistance.
    • If the circuit tests normal, replace the radio.
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