RS-485: Imported from Wikipedia (overwrite)

2026-05-03T14:12:10Z

Imported from Wikipedia (overwrite)

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{{Inline|date=April 2021}}

[[SAE International|Society of Automotive Engineers]] standard '''SAE J1587''' is an automotive diagnostic protocol standard developed by the [[Society of Automotive Engineers]] (SAE) for heavy-duty and most medium-duty vehicles built after 1985. The J1587 protocol uses different diagnostic connectors. Up to 1995, individual [[Original equipment manufacturer|OEMs]] used their own connectors. From 1996 to 2001, the 6-pin [[Deutsch (Interconnect Solutions)|Deutsch-connector]] was standard. Beginning in 2001, most OEMs converted to the 9-pin Deutsch. Some OEMs still use the 6-pin Deutsch. It has mostly been used for US made vehicles, and also by [[Volvo]]. Other European brands have usually used [[Keyword Protocol 2000|KWP]].

The pinout for the 9-pin connector is:
{| class="wikitable"
! Pin!!Signal
|-
| A||Ground
|-
| B||Unswitched +12 volts
|-
| F||J1708Datalink (+)
|-
| G||J1708Datalink (−)
|}

The pinout for the 6-pin connector is:
{| class="wikitable"
! Pin!!Signal
|-
| A||J1708Datalink (+)
|-
| B||J1708Datalink (−)
|-
| C||Unswitched +12 volts
|-
| E||Ground
|}

SAE [[J1708]] makes up the physical and data link layers while SAE J1587 makes up the transport and application layers with respect to the OSI model. SAE J1587 is used in conjunction with SAE J1708 for automobile communication.

==External links==
* [https://web.archive.org/web/20160917225648/http://old.dgtech.com/product/dpa/example/example.php TMC RP1210 Example Source Code for J1587]
* [https://www.sae.org SAE International Website]
* [http://pinoutsguide.com/CarElectronics/j1587_deutsch_6pin_pinout.shtml 6 pin deutsch connector view and pinout]

{{SAE International}}
{{Computer-bus}}

[[Category:Automotive technologies]]
[[Category:Automotive standards]]

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SAE J1587 - Revision history

RS-485: Imported from Wikipedia (overwrite)