Страница 1 мировой engineering стандарты общая спецификация

Future Expansion
CC to FD
Reserved By Document
FE to FF
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
Page 318
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Appendix E: DTC Status Byte and Failure Type Byte Definitions
This Appendix contains the bit definition of the DTC status byte, and also the definition of the DTC Failure

---

25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
https://translate.googleusercontent.com/translate_f
282/298
© Copyright 2010 General Motors All Rights Reserved
February 2010
Page 318 of 336
Type byte. A tester can retrieve this information (along with the base DTC number) from an ECU by requesting
the $A9 service.
E1 DTC Status Byte Bit Definitions
Every node shall adhere to the convention for storing bit-packed DTC status information as defined in
Table E1. Actual usage of the bit-fields may vary from node to node. The table breaks down the usage
convention by the type of node. The categories are Emission related nodes, Safety related nodes, and other
types of nodes which do not fall into either of the previous categories.
Table E1: DTC Status Bit Assignments
Bit
Description
Cvt
(By Node Type) Mnemonic
Emiss Safety Other
7
warningIndicatorRequestedState
This bit shall report the status of any warning indicators
associated with a particular DTC. Warning outputs may consist of
indicator lamp(s), displayed text information, etc. If no warning
indicators exist for a given system or particular DTC, this bit shall
be set to a value of 0. If the warning output is on for a given DTC,
the history status flag shall also be true.
1. Bit set to 1 = Warning indicator requested to be ON.
2. Bit set to 0 = Warning indicator not requested to be ON.
3. Bit will be set to a value of 0 on a successful code clear.
M
M
M
1