Browse Standards J1979_199406
Historical REVISED 1994-06-01

E/E DIAGNOSTIC TEST MODES J1979_199406

This SAE Recommended Practice defines diagnostic test modes, and request and response messages, necessary to be supported by vehicle manufacturers and test tools to meet the requirements of the California OBD II and Federal OBD regulations, which pertain to vehicle emission-related data only. These messages are intended to be used by any service tool capable of performing the mandated diagnostics.
Diagnostic Test Modes included in this document are:
For each test mode, this specification includes:
  1. a
    Functional descriptions of test mode
  2. b
    Request and response message formats
For some of the more complex test modes, an example of messages and an explanation of the interpretation of those messages is included.
J1979_201702
2017-02-16
Latest
Revised
J1979_201408
2014-08-11
Historical
Revised
J1979_201202
2012-02-23
Historical
Revised
J1979_201009
2010-09-28
Historical
Revised
J1979_200705
2007-05-30
Historical
Revised
J1979_200204
2002-04-30
Historical
Revised
J1979_199709
1997-09-01
Historical
Revised
J1979_199607
1996-07-01
Historical
Revised
J1979_199406
1994-06-01
Historical
Revised
J1979_199112
1991-12-01
Historical
Issued

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