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 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
ECU Hardware Performance watchdog/safety uC Failure
DTC C056D 39
ECU Hardware Performance Internal Electronic Failure
DTC C056D 3C
ECU Hardware Performance Internal Communications Failure
| Circuit/System Description |
The parking brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. The parking brake control module also contains the logic for applying and releasing the park brake when commanded by the park brake control switch. When the 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 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 parking brake control 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 message and/or a warning indicator may be displayed.
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| Conditions for Clearing the DTC |
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The parking brake control 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 parking brake control 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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| 2. |
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 Parking Brake Control Module.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for parking brake control module replacement, setup, and programming.
