LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 2019 >> CTS Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 123 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Digital Radio Poor or No Reception (U2Q) >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

WARNING: This page is about a different car, the 2018 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the digital radio antenna coax cable from the K46 Radio Antenna Module and the A11 Radio.
  2. Verify the digital radio antenna coax cable passes the coax cable component test. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the antenna coax cable

    • Go to next step: If the coax cable passes the test 
  3. Replace the K46 Radio Antenna Module.
  4. Ignition ON, A11 radio ON, tune to digital band.
  5. Verify DTC B125E is not set as current and digital reception is improved.
    • If DTC B125E is set as current or digital reception is improved 

      Replace the A11 Radio.

    • Go to next step: If DTC B125E is not set as current and digital reception is improved 
  6. All OK.
scientia non olet · About LEMON Manuals