ISO 14230-3:1999

This part of ISO 14230 specifies the requirements for the Keyword Protocol 2000 data link on which one or several on-vehicle Electronic Control Units are connected to an off-board tester in order to perform diagnostic functions.This part of ISO 14230 specifies the requirements of the implementation of the Diagnostic Services specified in ISO 14229, including -  byte-encoding and hexadecimal values for the service identifiers;-  byte-encoding for the parameters of the diagnostic service requests and responses;-  hexadecimal values for the standard parameters. The vehicle environment to which this part of ISO 14230 applies may consist of a single tester that may be temporarily connected to the on-vehicle diagnostic data link and several on-vehicle Electronic Control Units connected directly or indirectly.