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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular, Entertainment, And Navigation >> Diagnostic Information and Procedures >> Infotainment Control Switch Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON/Vehicle In Service Mode.
  2. Verify DTC U0073-U007E is not set.
    • Go to next step: If none of the DTCs are set 
  3. Refer to Circuit/System Testing.
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