Description – National Instruments CAN 372139B-01 User Manual
Page 225
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Chapter 6
Automotive Diagnostic Command Set API for C
© National Instruments Corporation
6-61
Automotive Diagnostic Command Set User Manual
Description
The usual procedure for getting a security access to the ECU is as follows:
1.
Request a seed from the ECU using
ndRequestSeed
with access mode = n.
2.
From the seed, compute a key for the ECU on the host.
3.
Send the key to the ECU using
with access mode = n + 1.
4.
The security access is granted if the ECU validates the key sent. Otherwise, an error is
returned.
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