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DTC C056E

DTC C056E

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

DTC C056E 42

Electronic Control Unit Software Calibration Not Programmed

DTC C056E 45

Electronic Control Unit Software Variant Not Programmed

DTC C056E 4A

Electronic Control Unit Software Programming Checksum Error

DTC C056E 4B

Electronic Control Unit Software Calibration Not Learned

DTC C056E 5A

Electronic Control Unit Software Not Plausible

Circuit/System Description

The electronic brake control module (EBCM) must be configured with the security code, CAN configuration data and vehicle options. If not properly configured after installation, the EBCM may set a DTC.

The internal fault detection is handled inside the control module. No external circuits are involved.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

The control module is not properly programmed.

Action Taken When the DTC Sets


• The ABS indicator turns ON.

• The electronic brake control module (EBCM) disconnects the traction control and stability control during the ignition cycle.


Conditions for Clearing the DTC


• The DTC is cleared if a diagnostic test is run and passes.

• The DTC stored in the history is cleared after 40 consecutive fault-free ignition cycles have taken place.


Diagnostic Aids

A newly replaced electronic brake control module (EBCM) can set one or more DTCs on its initial ignition ON cycle.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Ignition ON

2. Verify that DTC C056E has not been generated.

3. If the DTC C056E has been generated:

3.1. Program K17 electronic brake control module.

3.2. Confirm that the DTC is not generated after having run the vehicle over 40 km/h (25 mph).

3.3. If a DTC is generated, replace K17 the electronic brake control module.

3.4. If DTC is not generated:

3.5. All OK.

4. If DTC is not generated:

5. All OK.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for replacement, programming and setup of the electronic brake control module.