Страница 1 мировой engineering стандарты общая спецификация

Page 161
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
8. Perform security sequence. Send a DisableNormalCommunication request message, verify positive
response. Begin TesterPresent message periodic. Enable programming mode with the $A5 service. Send
RequestDownload message with a valid dataFormatIdentifier and an invalid unCompressedMemorySize
parameter value. Verify proper negative response reject message ($7F $34 $12, sub-function not
supported) is sent.
9. With the manufacturers enable counter > $00 or vulnerability flag = $FF and security has not been
accessed (SecurityAccess ($27) request has not been sent), send a DisableNormalCommunication

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WORLDWIDE ENGINEERING STANDARDS General Motors Local Area Network Enhanced Diagnostic Test Mode Specification
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request message, verify positive response. Begin TesterPresent message periodic. Enable programming
mode with the $A5 service. Send RequestDownload message with a valid dataFormatIdentifier and
unCompressedMemorySize parameter value. Verify that negative response message ($7F $34 $22,
conditions not correct) is sent (because security has not been accessed).
10. With the manufacturers enable counter > $00 or vulnerability flag = $FF, perform security sequence. Send
a DisableNormalCommunication request message, verify positive response. Begin TesterPresent
message periodic. Enable programming mode with the $A5 service. Send RequestDownload message
with a valid dataFormatIdentifier and unCompressedMemorySize parameter value. Verify positive
response message.
Procedure 3: 
(If negative response code $78 is supported by the ECU).
1. Perform security sequence. Send a DisableNormalCommunication request message, verify positive
response. Begin TesterPresent message periodic. Enable programming mode with the $A5 service.
Create the conditions under which the ECU should return a $7F $34 $78 response and send a valid
request for this service. Verify that proper response is sent.
2. Repeat previous step of this procedure for each possible reason an ECU would send the negative
response with response code $78.