J1587
Encyclopedia
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 OEMs used their own connectors. From 1996 to 2001, the 6-pin 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 KWP
.
The pinout for the 9-pin connector
is:
The pinout for the 6-pin connector is:
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.
Deutsch (Interconnect Solutions)
Deutsch is a manufacturer of electrical and fibre optic connectors. They specialise in extreme environments such as high temperature, pressure , high vibration and many other different applications like Space, Formula 1 cars, Defense, Civil & Military Aerospace and Battle Field applications.They...
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 KWP
Keyword Protocol 2000
Keyword Protocol 2000, abbreviated KWP2000, is a communications protocol used for on-board vehicle diagnostics systems . This protocol covers the application layer in the OSI model of computer networking...
.
The pinout for the 9-pin connector
is:
| PIN | SIGNAL |
| A | Ground |
| B | Unswitched +12 VOLTS |
| F | J1708Datalink (+) |
| G | J1708Datalink (-) |
The pinout for the 6-pin connector is:
| Pin | Signal |
| A | J1708Datalink (+) |
| B | J1708Datalink (-) |
| C | Unswitched +12 VOLTS |
| E | Ground |
SAE J1708
J1708
SAE J1708 is a standard used for serial communications between ECUs on a heavy duty vehicle and also between a computer and the vehicle. With respect to Open System Interconnection model , J1708 defines the physical layer...
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.