International Standard
ISO 14229-8:2020
Road vehicles — Unified diagnostic services (UDS) — Part 8: UDS on Clock eXtension Peripheral Interface (UDSonCXPI)
Reference number
ISO 14229-8:2020
Edition 1
International Standard
Read sample
ISO 14229-8:2020
Published (Edition 1, 2020)

ISO 14229-8:2020

ISO 14229-8:2020
CHF 173
Convert Swiss francs (CHF) to your currency


This document specifies the implementation of a common set of unified diagnostic services (UDS) on clock extension peripheral interface networks in road vehicles. The UDSonCXPI diagnostics defines methods to implement diagnostic data transfer between a client and the CXPI slave nodes via the CXPI master node.

This document specifies support of three different diagnostic classes for CXPI slave nodes.

This document references ISO 14229-1 and ISO 14229-2 and specifies implementation requirements of the UDSonCXPI communication protocol for mainly HMI (Human Machine Interface), but not limited to, electric/electronic systems of road vehicles. UDSonCXPI defines how to implement the diagnostic data transfer between a client and CXPI slave nodes via CXPI master node.

NOTE UDSonCXPI does not specify any requirement for the in-vehicle CXPI bus architecture.

This document refers to information contained in ISO 14229-1, ISO 14229-2 and ISO 20794 (all parts).

This document does not include any redundant information of the above-mentioned documents.

It focuses on

— additional requirements specific to the implementation of UDSonCXPI network, and

— specific restrictions in the implementation of UDSonCXPI network.

General information

  •  : Published
     : 2020-02
    : International Standard published [60.60]
  •  : 1
     : 43
  • ISO/TC 22/SC 31
  • RSS updates

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)