PRE-RELEASE
DTC C056D
| DTC C056D |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC C056D 00
Electronic control module, hardware
DTC C056D 0F
Signal interference in Electronic control module components
DTC C056D 18
Electronic control module components, low signal amplitude
DTC C056D 31
Electronic control module components, internal checksum error
DTC C056D 32
Electronic control module components, general memory error
DTC C056D 33
Electronic control module components, specific memory error
DTC C056D 34
ECU Hardware Performance RAM Failure
DTC C056D 35
ECU Hardware Performance ROM Failure
DTC C056D 36
ECU Hardware Performance EEPROM Failure
DTC C056D 37
Electronic Control Unit Hardware Malfunction
DTC C056D 39
In internal hardware failure is detected
DTC C056D 3A
Electronic control module components installed incorrectly
DTC C056D 3B
Electronic Control Unit Hardware Self-Test Malfunction
DTC C056D 3C
Electronic Control Unit Hardware Internal Malfunction
DTC C056D 43
Electronic control module components EEPROM programmed incorrectly
| Circuit/System Description |
The electric parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The electric parking brake control module also contains the logic for applying and releasing the parking brake when commanded by the electric parking brake switch. When the electric parking brake control module receives a signal from the switch the internal circuit board temperature is checked to verify it is within operating range before the control module performs the requested operation. The electric parking brake module will perform diagnostics on the modules internal hardware to verify it is functioning properly
| Conditions for Running the DTC |
Ignition OFF, ACCESSORY, or RUN mode.
| Conditions for Setting the DTC |
The electric parking brake module detects an internal hardware malfunction.
| Action Taken When the DTC Sets |
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The electric parking brake is disabled.
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A DIC message and/or a warning indicator may be displayed.
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| Conditions for Clearing the DTC |
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The electric parking brake module clears the history DTC when a current DTC is not detected in 40 ignition cycles.
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The condition for setting the DTC is no longer present.
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The latest software and calibrations are programmed into the electric parking brake module.
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| Reference Information |
Schematic Reference
Park Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Parking Brake Control Module Description
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Verify DTC C056D 36 is not set.
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If DTC is set, perform the
Electronic Parking Brake Control Module Programming and Setup
.
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| 3. |
With a scan tool , perform the Parking Brake Actuator DTC Reset procedure. Verify DTC C056D is not set.
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| 4. |
If the DTC is set, replace the K83 Electric Parking Brake Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for Electric Parking Brake Module replacement, setup, and programming.
