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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 11 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1025-B1135 >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Envision. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, infotainment system ON, mute OFF.
  2. Verify clear audio is heard from each speaker, adjusting fade and balance controls to test each speaker individually.
    • If audio is inoperative from one or more speakers, or the audio emitted is not clear 

      Refer to Circuit/System Testing.

    • Go to next step: If clear audio is heard from all speakers 
  3. All OK.