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
- Electronic Control Unit Software Calibration Not Programmed

DTC C056E 47
- Electronic Control Unit Software VIN Not Programmed

Conditions for Running the DTC

* Ignition ON.

* Ignition voltage is greater than 8 V.

Conditions for Setting the DTC

A new service replacement Electronic Brake Control Module contains a unique manufacturing calibration. This DTC will be current whenever a new Electronic Brake Control Module is installed on a vehicle prior to the Service Programming System (SPS) event. The DTC will remain current until the Electronic Brake Control Module has undergone a successful program. Once the program event is completed, the DTC goes into history and can be cleared. After the DTC is cleared it can not return.

Action Taken When the DTC Sets

* The ABS Indicator turns ON.

* The red Brake Warning Indicator turns ON.

* The Traction/stability Control Indicator turns ON, if equipped with electronic stability control.

* The Electronic Brake Control Module disables the ABS,and the Traction/stability for the duration of the ignition cycle.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

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

Reference Information

Schematic Reference

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

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

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. Verify that DTC C056E is not set.

• If the DTC is set

1. Ignition ON

2. Program the K17 Electronic Brake Control Module.

3. 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.

4. All OK.

• If the DTC is not set

2. 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