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ISO Standards

OBD, CAN, EV, RV

ISO Standards

Postby AutomotiveLearner » Thu Jul 02, 2015 5:43 pm

What is the difference between the UDS protocol and KWP2000 over CAN. Please help me to understand. Are both of them ISO standards?
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Re: ISO Standards

Postby Marrs » Mon Jul 16, 2018 3:10 am

KWP2000 is out of fashion now. In Europe, it has been stipulated that since 2008, the new off-line vehicles no longer use the KWP2000 based diagnostic system, using the ISO 15765 diagnostic system. UDS is basically in a dominant position and has a tendency to develop into a dominant position.
The difference between the two ISO diagnostic criteria is:
KWP2000:ISO14230
UDSonCAN:ISO14229
From the network level of OSI layering, the difference between them is:
The KWP2000 unrelated protocol stipulates the network layer and needs to be customized by the user, which will increase the difficulty of use, and the UDSonCAN architecture has ISO15765-2 to define the related content of the network layer, and has defined a perfect communication error handling mechanism and bus arbitration mechanism, which is more convenient to use.
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