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


GM WORLDWIDE ENGINEERING STANDARDS



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GM WORLDWIDE ENGINEERING STANDARDS 
GMW3110 
© Copyright 2010 General Motors All Rights Reserved 
February 2010 
Page 329 of 336 
E1.3.2 DTC Failure Sub Type (Symptom) Definition of Additional General Electrical Failures. 
Table E5: DTC Failure Sub Type Definition for Failure Category 
“1” 
Failure 
Type 
Sub 
Type 
Additional General Electrical Failures 
Note: 
This category includes the overflow from category 0. 
Byte 
Nibble 
Sub Type 
(hex) 
(binary) 
Description 
Definition 
10 
0000 
reserved 
11 
0001 
above maximum threshold 
This sub type is used for failures where some circuit 
quantity is above a specified range. 
12 
0010 
below minimum threshold 
This sub type is used for failures where some circuit 
quantity is below a specified range. 
13 
0011 
voltage low/high temperature 
This sub type is used for failures where a temperature 
sensor with a negative temperature coefficient detects a 
voltage below a specified range. 
14 
0100 
voltage high/low temperature 
This sub type is used for failures where a temperature 
sensor with a negative temperature coefficient detects a 
voltage above a specified range. 
15 
0101 
signal rising time failure 
This sub type is used for failures where the signal rise 
time is outside a specified range. 
16 
0110 
signal falling time failure 
This sub type is used for failures where the signal fall 
time is outside a specified range. 
17 
0111 
signal shape/ waveform failure 
This sub type is used for failures where the shape of the 
signal (plot of the amplitude with respect to time) is not 
correct, e.g., improper circuit impedance. 
18 
1000 
signal amplitude < minimum 
This sub type is used for failures where the ECU 
measures a signal voltage below a specified range but 
not necessarily a short to ground, e.g., gain too low. 
19 
1001 
signal amplitude > maximum
This sub type is used for failures where the ECU 
measures a signal voltage above a specified range but 
not necessarily a short to battery, e.g., gain too high. 
1A 
1010 
bias level out of range 
This sub type is used for failures where the ECU applies 
a bias voltage to a circuit upon which is superimposed a 
signal voltage, e.g., Oxygen Sensor circuit. 
1B 
1011 
signal cross coupled 
This sub type is used for failures where the ECU detects 
a circuit shorted to another circuit when both circuits are 
controlled by the ECU. 
1C 
1100 
reserved 
1D 
1101 
reserved 
1E 
1110 
reserved 
1F 
1111 
intermittent 
This sub type is used for failures where the ECU 
momentarily detects one of the conditions defined above 
but not long enough to set a specific sub type. 
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