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8 pin Volvo truck DLC diagnostic connector layout
8 pin Volvo truck DLC diagnostic connector

 

Pin
Number
Pin
Name
Description
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 

Pin
Number
Pin
Name
Description HD-OBD-2 adapter
pin Number
16 pin connector
1   GND   Ground 4+5
4   CAN   CAN diagnostic interface
  
1
7   CAN 12
8   +24V   24V Power 16 (Note the voltage!)
According to 1 reports in our database (1 positive and 0 negative) the Volvo truck 8 pole diagnostic pinout should be correct.

Is this pinout
Volvo truck 8 pole diagnostic visual pinout:click to enlarge
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