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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
E1.3.5 DTC Failure Sub Type (Symptom) Definition of ECU Programming Failures.
Table E8: DTC Failure Sub Type Definition for Failure Category “4”
Failure
Type
Sub
Type
ECU Programming Failures
Note: 
This category includes faults related to operational software, calibrations, and
options; remedied by programming the ECU.
Byte
Nibble 
Sub Type
(hex) (binary) 
Description
Definition
40
0000 reserved
41
0001 operational software/calibration
set not programmed
This sub type is used to indicate that only boot software
is present in the ECU.
42
0010 calibration data set not
programmed
This sub type is used to indicate that operational
software is present but calibration data is not.
43
0011 EEPROM error
This sub type is used to indicate an EEPROM error that
may be remedied by reprogramming the module.
44
0100 security access not activated
This sub type is used to indicate that programming was
attempted without unlocking the ECU.
45
0101 variant not programmed
This sub type is used to indicate the need to enter
(program) the sub system option content.
46
0110 vehicle configuration not
programmed
This sub type is used to indicate the need to enter
(program) the vehicle option content.
47
0111 VIN not programmed
This sub type is used to indicate the need to enter
(program) the vehicle identification number (VIN).
48
1000 theft/security data not
programmed
This sub type is used to indicate the need to enter
(program) the theft/security code.
49
1001 RAM error
This sub type is used by the ECU to indicate a Random
Access Memory (RAM) error remedied by
reprogramming.
4A
1010 checksum error
This sub type is used by the ECU to indicate an incorrect
checksum calculation where memory type is not
specified.
4B
1011 calibration not learned
This sub type is used by the ECU to indicate that a
password, operational range, etc. for a sensor or
actuator must be learned by the ECU.
4C
1100 DTC memory full
This sub type is used by the ECU to indicate that more
DTCs have been detected than can be accommodated
by the memory allocated for DTC storage.
4D
1101 stack overflow
This subtype is used by the ECU to indicate that more
memory has been used in a stack than is allocated to a
program.
4E
1110 reserved

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4F
1111 reserved
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