General Specification Electrical Function gmw3110 General Motors Local Area Network Enhanced Diagnostic Test Mode Specification

GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 333 of 336 
E1.3.6 DTC Failure Sub Type (Symptom) Definition of Algorithm Based Failures. 
Table E9: DTC Failure Sub Type Definition for Failure Category 
“5” 
Failure 
Type 
Sub 
Type 
Algorithm Based Failures 
Note: 
This category includes faults based on comparing two or more input parameters for 
plausibility or comparing a single parameter to itself with respect to time. 
Byte 
Nibble 
Sub Type 
(hex) 
(binary) 
Description 
Definition 
50 
0000 
reserved 
51 
0001 
reserved 
Defined in previous revision of this specification as 
calculation failure
. Eliminated due to redundancy with 
other existing fault types. 
52 
0010 
reserved 
Defined in previous revision of this specification as 
compare failure
. Eliminated due to redundancy with 
other existing fault types. 
53 
0011 
temperature low 
This sub type is used for failures where the ECU 
calculates a low temperature condition based upon the 
duration of certain operating parameters. 
54 
0100 
temperature high 
This sub type is used for failures where the ECU 
calculates a high temperature condition based upon the 
duration of certain operating parameters. 
55 
0101 
expected number of transitions/ 
events not reached 
This sub type is used for failures where the ECU 
monitors a parameter over time within specified limits 
and detects fewer than the expected number of 
transitions. 
56 
0110 
allowable number of transitions/ 
events exceeded 
This sub type is used for failures where the ECU 
monitors a parameter over time within specified limits 
and detects more than the expected number of 
transitions. 
57 
0111 
reserved 
Defined in previous revision of this specification as