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Application Layer - Diagnostics
- Ground Vehicle Standard
- J1939/73_201601
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
SAE J1939-73 Diagnostics Application Layer defines the SAE J1939 messages to accomplish diagnostic services and identifies the diagnostic connector to be used for the vehicle service tool interface. Diagnostic messages (DMs) provide the utility needed when the vehicle is being repaired. Diagnostic messages are also used during vehicle operation by the networked electronic control modules to allow them to report diagnostic information and self-compensate as appropriate, based on information received. Diagnostic messages include services such as periodically broadcasting active diagnostic trouble codes, identifying operator diagnostic lamp status, reading or clearing diagnostic trouble codes, reading or writing control module memory, providing a security function, stopping/starting message broadcasts, reporting diagnostic readiness, monitoring engine parametric data, etc. California, EPA, or EU regulated OBD requirements are satisfied with a subset of the specified connector and the defined messages.
Rationale
Replaced approximately 54 case where a cross reference was lost in publication process resulting in reference of “See 0”.
Replaced many other lost links found during review.
Fixed some confusing formatting.
Topic
Data Sets - Support Documents
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| Table 1 | Emission related component PGN and SPN support | |
| Table 2 | Regulation definition legend | |
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| Table 4 | Summary of diagnostic mode assignments | |
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| Table 5 | Lamp command and lamp flash dependency definition | |
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| Table 6 | Test results | |
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| Table 7 | Example - use of test identifiers supported | |
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| Table 8 | DM13 usage requirements | |
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| Table 9 | Pointer extension states (if pointer type is ‘1’) | |
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| Table 10 | Key states (i.e., only for key and not user level) | |
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| Table 11 | EDCP extension states | |
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| Table 12 | Error indicator states (only when edcp extension = 6) | |
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| Table 13 | Seed states | |
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| Table 14 | Message appearance when multipacketed | |
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| Table 17 | Security entity types | |
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| Table 18 | SAE J1939-73 Monitor performance | |
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| Table 19 | Individual DTC clear/reset control byte | |
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| Table 20 | Negative acknowledge indicators for individual DTC clear | |
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| Table 22 | SPN support type | |
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| Table 23 | Example DM24 response | |
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| Table 24 | Fault reporting messages by status and severity class | |
| Table 25 | PGN Assignments for harmonized failure reporting | |
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| Table H1 | Message support by OBD compliant devices and J1939 network contributors | |
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| Table J1 | Example EGR OBD readiness construction | |
| Table K-1 | DM36 HRWV, DM37 HRWS, and DM1 active DTCs content by MI activation mode for Euro VI |
Issuing Committee
Truck Bus Control and Communications Network Committee
The Truck and Bus Control and Communications Network Committee of the Truck & Bus Electrical/Electronic Steering Committee is responsible for developing, reviewing and approving standards, recommended practices and information reports related to communication networks for the exchange of control and diagnostic information among electronic components on or connected to truck and bus vehicles. The objective is the architecture of communication networks offering an open interconnect system that supports communication between loose package components, such as engines and transmissions, which are sourced from many different component suppliers and integrated into vehicle systems. The communication networks are developed for use in on-highway and off-highway trucks and their trailers, buses, construction equipment, and agricultural equipment and implements, and applicable to light-duty, medium-duty, and heavy-duty vehicles used on-road or off-road, and for appropriate stationary applications which use vehicle derived components (e.g. generator sets).
Reference
| Number | Title |
|---|---|
| J1587 | This document is not part of the subscrption. |
| J1939/13_201610 | Off-Board Diagnostic Connector |
| J1939/21_201603 | Data Link Layer |
| J1939/71_201610 | Vehicle Application Layer |
| J1939/84_201601 | OBD Communications Compliance Test Cases for Heavy Duty Components and Vehicles |
| J1939DA_201510 | J1939 Digital Annex |
| J1939_201808 | Serial Control and Communications Heavy Duty Vehicle Network - Top Level Document |
| J1979_201702 | E/E Diagnostic Test Modes |
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