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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Power Steering System) >> Diagnostic Information and Procedures >> DTC C056D (Power Steering Control Module): Electronic Control Unit Hardware >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2015 Buick LaCrosse. 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 with symptom byte 19, 38, 3B, 3C, 49, or 5A 
    1. Program the K43 Power Steering Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the K43 Power Steering Control Module.
      • If the DTC does not set
    3. All OK.
    • If DTC C056D is set with symptom byte 37 or 39 

      Replace the K43 Power Steering Control Module

    • If DTC C056D is not set 
  3. All OK
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