DTC C056D
Diagnostic Instructions
DTC Descriptor
DTC C056D 00: Electronic Control Unit
Hardware |
DTC C056D 0F: Electronic Control Unit Hardware
Signal Erratic |
DTC C056D 18: Electronic Control Unit Hardware
Low Signal Amplitude |
DTC C056D 31: Electronic Control Unit Hardware
Internal Checksum Error |
DTC C056D 32: Electronic Control Unit Hardware
General Memory Malfunction |
DTC C056D 33: Electronic Control Unit Hardware
Special Memory Malfunction |
DTC C056D 34: Electronic Control Unit Hardware
RAM Malfunction |
DTC C056D 35: Electronic Control Unit Hardware
ROM Malfunction |
DTC C056D 36: Electronic Control Unit Hardware
EEPROM Performance/Malfunction |
DTC C056D 37: Electronic Control Unit Hardware
Software Malfunction |
DTC C056D 39: Electronic Control Unit Hardware
Internal Malfunction |
DTC C056D 3A: Electronic Control Unit Hardware
Incorrect Component Installed |
DTC C056D 3B: Electronic Control Unit Hardware
Self-Test Malfunction |
DTC C056D 3C: Electronic Control Unit Hardware
Internal Communication Malfunction |
DTC C056D 43: Electronic Control Unit Hardware
EEPROM Incorrect Programming |
Circuit/System Description
The internal fault detection is handled inside the control
module. The symptom byte listed in the DTC Descriptor is for
engineering reference only. No external circuit diagnosis is
involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when
power up is commanded. The only requirements are voltage and
ground. This program runs even if the voltage is out of the valid
operating range.
Conditions for Setting the DTC
The module has detected an internal malfunction.
Action Taken When the DTC Sets
The module refuses all additional inputs.
Conditions for Clearing the DTC
• |
A current DTC clears when the
malfunction is no longer present. |
• |
A history DTC clears when the
module ignition cycle counter reaches the reset threshold of 50,
without a repeat of the malfunction. |
Diagnostic Aids
• |
This DTC may be stored as a
history DTC without affecting the operation of the module.
|
• |
If stored only as a history
DTC and not retrieved as a current DTC, do not replace the
module. |
• |
If this DTC is retrieved as
both a current and history DTC, replace the module that set the
DTC. |
Circuit/System Verification
Verify that DTC C056D is not set.
If the DTC is set in a control module that can be programmed,
program the control module. If the DTC resets, replace the control
module that set the DTC. If the DTC is set in a control module that
can not be programmed, replace the control module that set the DTC.
If the DTC is set in a sensor, replace the sensor that set the DTC.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for module replacement, programming
and setup
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