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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> DTC B1446 or B1447: Backup Power Source (UI3) >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON/vehicle in Service Mode
  2. Verify DTC B1446 or B1447 is not set in the Telematics Communication Interface Control Module
    • If DTC B1446 or B1447 is set 

      Repalce the C3 Telematics Communication Interface Control Module Battery

  3. Verify DTC B1446 or B1447 is not set in the Telematics Communication Interface Control Module
    • If DTC B1446 or B1447 is set 

      Replace the K73 Telematics Communication Interface Control Module

    • If DTC B1446 or B1447 is not set 
  4. All OK
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