Buick Regal Owners & Service Manuals

Buick Regal: DTC C056D

Diagnostic Instructions

  • Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
  • Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
  • An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

DTC Descriptor

DTC C056D

Electronic Control Unit Hardware

Symptom Byte Information: Symptom Byte List.

Circuit/System Description

The internal fault detection is handled inside the control module. No external circuit diagnosis is involved.

Conditions for Running the DTC

Ignition On

Conditions for Setting the DTC

K43 Power Steering Control Module = Malfunction

Actions Taken When the DTC Sets

K43 Power Steering Control Module = Disabled

Conditions for Clearing the DTC

  • A current DTC will clear on the next malfunction-free ignition cycle.
  • A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

  • This DTC can be set as a history DTC without affecting the operation of the component: K43 Power Steering Control Module
  • If set only as a history DTC, do not replace any component.

Reference Information

Schematic Reference

Power Steering Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Electrical Information Reference

  • Circuit Testing
  • Connector Repairs
  • Testing for Intermittent Conditions and Poor Connections
  • Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify DTC C056D is not set.

  • If the DTC is set
  1. Perform all necessary programming and setup procedures for the control module: K43 Power Steering Control Module
  2. Verify the DTC does not set.
    • If the DTC sets - Replace the component: K43 Power Steering Control Module
    • Go to next step: If the DTC is not set
  3. All OK.
  • Go to next step: If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

For control module replacement, programming, and setup refer to: Control Module References

    READ NEXT:

     DTC C056D (Power Steering Control Module)

    Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis:Strategy

     DTC C056E (Power Steering Control Module)

    Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis:Strategy

     DTC C1436

    Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis:Strategy

    SEE MORE:

     DTC B2545

    Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors D

     Description and Operation

    ABS DESCRIPTION AND OPERATION B22 - B22 Brake Pedal Position Sensor S48E - S48E Multifunction Switch - Center Console P16 - P16 Instrument Cluster K9 - K9 Body Control Module K20 - K20 Engine Control Module K71 - K71 Transmission Control Module K17 - K17 Electronic Brake Control Module Q5 - Q5 Brak

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