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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 327 (Data Communication System) >> Diagnostic Information and Procedures >> DTC C056D >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC C056D is not set.
    • If DTC C056D is set in a device that can be programmed 
    1. Program the device that set the DTC.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the device that set the DTC.
      • If the DTC does not set
    3. All OK.
    • If DTC C056D is set in a device that cannot be programmed 

      Replace the device that set the DTC.

    • If DTC C056D is not set 
  3. All OK
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