Страница 1 мировой engineering стандарты общая спецификация

8.6.2 Request Message Definition. 
(Table 80)
Table 80: ReadDataByParameterIdentifier Request Message
Data Byte Parameter Name 
Note 1
Cvt Hex Value Mnemonic
#1
ReadDataByParameterIdentifier Request Service Id
M
22
SIDRQ
#2
#3
parameterIdentifier #1 = [
byte 1 (MSB)
byte 2 (LSB)]
M
00 thru FF
00 thru FF
PID_
B1
B2
#4
#5
parameterIdentifier #2 = [
byte 1 (MSB)
byte 2 (LSB)]
U
00 thru FF
00 thru FF
PID_
B1
B2
:
:
:
:
:
#n-1
#n
parameterIdentifier #k = [
byte 1 (MSB)
byte 2 (LSB)]
U
00 thru FF
00 thru FF
PID_
B1
B2
Note 1: 
MSB = Most Significant Byte, LSB = Least Significant Byte.
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GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8.6.2.1 Request Message Sub-Function Parameter $Level (LEV_) Definition. 
This service does not use a
sub-function parameter.

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8.6.2.2 Request Message Data Parameter Definition. 
Table 81 specifies the data parameter definitions for
this service.
Table 81: Data Parameter Definition
Definition
ParameterIdentifier # (1 - k)
This parameter identifies the ECU data that is being requested by the tester.
8.6.3 Positive Response Message Definition (Table 82).