Antilock Brake System

DTC C056E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C056E 42

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Electronic Control Unit Software Calibration Not Programmed

DTC C056E 45

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Electronic Control Unit Software Variant Not Programmed

DTC C056E 4A

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Electronic Control Unit Software Programming Checksum Error

DTC C056E 4B

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Electronic Control Unit Software Calibration Not Learned

DTC C056E 5A

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Electronic Control Unit Software Not Plausible

Circuit/System Description

The electronic brake control module must be configured with the security code, the configuration data and the vehicle options. If not properly configured after installation, the electronic brake control module 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 traction control/stability control-active indicator turns ON.

* The electronic brake control module disables the traction control and the electronic stability control for the duration of the ignition cycle.

Conditions for Clearing the DTC

* The DTC clears when the diagnostic runs and passes.

* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.

Diagnostic Aids

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

Reference Information

Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views Sunshade - Left Front

Description and Operation

ABS Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify that DTC C056E is not set.

• If the DTC is set

1. Program the K17 electronic brake control module.

2. Verify the DTC does not set after driving the vehicle above 40 km/h (25 mph).

• If the DTC sets, replace the K17 electronic brake control module.

• If the DTC does not set

3. All OK.

• If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

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