Cars, Bikes and Trucks Diagnostic Interfaces  > Volvo pinouts


1   GND   Ground
4   J1708+   J1708 485 diagnostic interface
7   J1708-
8   +24V   24V Power

J1708 interface details

J1708 is an SAE specification developed especially for heavy duty vehicles (trucks and buses). The protocol uses the same transceiver as RS-485. The bus network supports at least 20 nodes with these transceivers and no terminators are needed.The intention is that the protocol will promote a standard for serial communication between modules with microcontrollers.  J1708 protocol only describes the lower layers of the OSI model it is always used with an overlaying application layer. An example of such a layer is J1587 which is used for data exchange between microcontrollers in heavy duty vehicles.

Should be compatible with the following trucks:

  • FH (2005-2012)
  • FH 12 (1999-2005)
  • FH 16 (1999-2012)
  • FL 6 (2000-2006)
  • FM (2005-2012)
  • FM 10 (1998-2001)
  • FM 12 (1998-2005)
  • FM 7 (1998-2001)
  • FM 9 (2002-2005)

Volvo FH-12, FH-16 CAN 

Description HD-OBD-2 adapter
pin Number
16 pin connector
1   GND   Ground 4+5
4   CAN   CAN diagnostic interface
7   CAN 12
8   +24V   24V Power 16 (Note the voltage!)
8 pin Volvo truck DLC proprietary of Volvo truck 8 pole diagnostic connector layout
8 pin Volvo truck DLC proprietary connector
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