Страница 1 мировой engineering стандарты общая спецификация

Procedure 4: 
The steps in this procedure are to be performed sequentially. This procedure is to be performed
twice, once while the ECU is secured (manufacturers enable counter = $00, vulnerability flag < $FF, and
security has not been accessed (SecurityAccess ($27) request has not been sent)) and once while the ECU is
unsecured ((manufacturers enable counter > $00 or vulnerability flag = $FF), and security has been accessed
(SecurityAccess ($27) request has been sent)).
1. Send a valid security access request message with $Level = $01. Verify the proper positive response
($0000 seed if unlocked and non zero seed if locked).
2. This step is performed when the seed in the above step is a non zero value. Send a valid security access
request message $02 with a correct key and verify the proper positive response message.
3. Verify that the device is now unsecured by attempting a secure mode and verifying the appropriate positive
response.
4. Send valid $3E message within P3
C 
ms for 2 minutes. Then verify the device remains unsecured by
attempting a secure service and verifying the appropriate positive response.
5. Stop sending TesterPresent ($3E) messages. Verify that after P3
Cmax 
ms without sending a $3E message
the device is secured by requesting a secure service and verifying the appropriate negative response.
Procedure 5: 
This procedure is to be performed when the ECU vulnerability flag is not $FF (if supported) and
the MEC = 0.
1. Send a valid security access request message $01 and verify $67 $01 $seedMsb $seedLsb response.
2. After step 1 is complete, send a security access request message with level $02 and an incorrect key.
Verify $7F $27 $35 response.
3. Repeat step 1 and 2 of this procedure and verify that the response from step 2 (the second level $02
message) changes to $7F $27 $36. Then send a request for this service with $Level = $01 within 10 s and
verify $7F $27 $37 message.
4. After performing steps 1 through 3 of this procedure, verify that the ECU remains locked by attempting a
secure service and verifying the correct negative response.