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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 B19DA >> Circuit/System Verification

Circuit/System Verification

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  1. Verify DTC B19DA is not set.
    • If DTC B19DA is set 

      Test or replace the Communication Interface Module Battery.

  2. Verify DTC B19DA is not set.
    • If DTC B19DA is set 

      Test or replace the K73 Telematic Control Module

    • Go to next step: If DTC B19DA is not set 
  3. A fault is currently not present and may be an intermittent condition.
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