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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Cellular, Entertainment, And Navigation - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B2B15 >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Verify DTC B2B15 is not set.
    • If DTC B2B15 is set 

      Replace the K73 Telematic Control Module.

    • Go to next step: If DTC B2B15 is not set 
  3. All OK.
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