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Home >> Buick >> 2013 >> Verano Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1025, B1035, B1045, or B1055 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate P19 speaker.
  2. Radio ON, test for 4-8 V between the signal circuit terminal 1 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
  3. Test for 4-8 V between the signal circuit terminal 2 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the A11 radio.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the A11 radio.
  4. If all circuits test normal, replace the appropriate P19 speaker.
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