Страница 1 мировой engineering стандарты общая спецификация

Last Stored Repair Shop Codes or Tester Serial Number (Bytes #1 thru #10)
When a tool writes a dealer code or tester serial number into DID $98, the data previously stored in DID
$98 is copied (without additional tool intervention) into the module memory housing byte positions #1
through #10 of this DID.
Second from Last Stored Repair Shop Codes or Tester Serial Number (Bytes #11 thru #20)
When a tool writes a dealer code or tester serial number into DID $98, the data previously in byte
positions #1 through #10 of this DID are moved to positions #11 through #20. The data previously stored
in DID $98 are then copied into this DID in byte positions #1 through #10.
1 Position
1
2
3
4
5
6
7
8
9
10 …
LSRSCOSN
S
N
1
2
3
4
5
6
7
8 …
Hex Value
58 31 31 32 33 34 35 36 37 38 …
2 Position
1
2
3
4
5
6
7
8
9
10
SLSRSCOSN
S
N
3
3
3
8
5
9
9
7
Hex Value
58 33 33 33 33 38 37 39 39 37
Page 300
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110

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25.06.2020
WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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© Copyright 2010 General Motors All Rights Reserved
February 2010
Page 300 of 336
Table C11: Definition of Manufacturers Enable Counter dataIdentifier
DID Description
R/W
Data Type
Len
$A0 
manufacturers_enable_counter (MEC)
R/W
2
USN
1
This DID contains the MEC, which is used when determining the current status of ECU security. Refer to
paragraph 9.3.2.6.2 for a description of the manufacturers_enable_counter and for additional
requirements surrounding its implementation.
$00: ECU is locked (security system armed)
$FE $01: ECU is unlocked (security system not armed)
$FF: For use during a device’s development cycle. Usage of this value shall be specified in the
CTS/SSTS or other ECU specific diagnostic document referenced by the CTS or SSTS