DTC C056D
Diagnostic Instructions
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 parking 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
• |
The electric parking brake is
disabled. |
• |
A message and/or a warning
indicator may be displayed. |
Conditions for Clearing the DTC
• |
The parking brake control
module clears the history DTC when a current DTC is not detected in
40 ignition cycles. |
• |
The condition for the DTC is
no longer present. |
• |
The latest software and
calibrations are programmed into the parking brake control
module. |
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
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. |
Verify DTC C056D 36 is not
set. |
2. |
With a scan tool , perform the
Parking Brake Actuator DTC Reset procedure. Verify DTC C056D is not
set. |
⇒ |
If the DTC is set, replace the K83 Parking Brake
Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification
|