ISO 15765-4:2021
Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems
This document specifies requirements for CAN-based communication systems between the in-vehicle network and the diagnostic link connector of the vehicle. This document does not specify any requirements related to the in-vehicle CAN network architecture. This document specifies the requirements to enable the in-vehicle CAN-based communication systems to establish, maintain, and terminate communication with the devices connected to the diagnostic link connector.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 Conventions
6 Application
6.1 Vehicle communication initialisation sequence
6.1.1 OBDonUDS protocol identification
6.1.2 OBDonEDS protocol identification
6.1.3 Others
6.2 External test equipment communication initialisation sequence
6.3 Bit rate validation procedure
6.3.1 bitrateRecord
6.3.2 Bit rate validation
6.3.3 External test equipment error detection provisions
6.4 CAN identifier validation procedure
6.4.1 CAN identifier validation procedure OBDonEDS
6.4.2 CAN identifier validation procedure OBDonUDS
6.5 Support of ECUNAME reporting
7 Application layer (AL)
8 Session layer (SL)
9 Transport layer (TL)
10 Network layer (NL)
10.1 General
10.2 Parameter definitions
10.2.1 Timing parameter values
10.2.2 Definition of flow control parameter values
10.2.3 Maximum number of OBDonUDS or OBDonEDS ECUs
10.3 Addressing formats
10.3.1 Normal and normal fixed addressing format
10.3.2 Functional addressing
10.3.3 Physical addressing
10.4 CAN identifier requirements
10.4.1 External test equipment
10.4.2 OBDonUDS or OBDonEDS server/ECU
10.5 Mapping of diagnostic addresses
10.5.1 OBDonUDS/OBDonEDS CAN identifiers
10.5.2 11-bit CAN identifiers
10.5.3 29-bit CAN identifiers
11 Data link layer (DLL)
12 Physical layer (PHY)
12.1 General
12.2 Bit rates
12.3 CAN bit timing
12.3.1 Parameter values
12.3.2 Nominal bit rate 250 kbit/s
12.3.3 Nominal bit rate 500 kbit/s
12.4 External test equipment
12.4.1 Electrical parameters
12.4.2 Cable parameters
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
4.1 Symbols
4.2 Abbreviated terms
5 Conventions
6 Application
6.1 Vehicle communication initialisation sequence
6.1.1 OBDonUDS protocol identification
6.1.2 OBDonEDS protocol identification
6.1.3 Others
6.2 External test equipment communication initialisation sequence
6.3 Bit rate validation procedure
6.3.1 bitrateRecord
6.3.2 Bit rate validation
6.3.3 External test equipment error detection provisions
6.4 CAN identifier validation procedure
6.4.1 CAN identifier validation procedure OBDonEDS
6.4.2 CAN identifier validation procedure OBDonUDS
6.5 Support of ECUNAME reporting
7 Application layer (AL)
8 Session layer (SL)
9 Transport layer (TL)
10 Network layer (NL)
10.1 General
10.2 Parameter definitions
10.2.1 Timing parameter values
10.2.2 Definition of flow control parameter values
10.2.3 Maximum number of OBDonUDS or OBDonEDS ECUs
10.3 Addressing formats
10.3.1 Normal and normal fixed addressing format
10.3.2 Functional addressing
10.3.3 Physical addressing
10.4 CAN identifier requirements
10.4.1 External test equipment
10.4.2 OBDonUDS or OBDonEDS server/ECU
10.5 Mapping of diagnostic addresses
10.5.1 OBDonUDS/OBDonEDS CAN identifiers
10.5.2 11-bit CAN identifiers
10.5.3 29-bit CAN identifiers
11 Data link layer (DLL)
12 Physical layer (PHY)
12.1 General
12.2 Bit rates
12.3 CAN bit timing
12.3.1 Parameter values
12.3.2 Nominal bit rate 250 kbit/s
12.3.3 Nominal bit rate 500 kbit/s
12.4 External test equipment
12.4.1 Electrical parameters
12.4.2 Cable parameters
Bibliography